That Tiny-Tach won't work on a Gama Goat because the Detroit 3-53 doesn't have injection lines The injectors are directly driven by a cam lobe so there is nowhere to put the Tiny-Tach pickup/sensor. It was a screw on plastic tach with LED numbers. 0 bushel assembly. Since you can't waste time doing other things while you count pulses I set up the counter to suspend other things for 1 sec while pulses were counted then went on with other things, eg, display for a few seconds then back to get another count. Interesting enough the interior doesn’t have as much room as the 2012 extended cab Colorado that I traded in. It starts instantly with very little throttle and idles, but with a vibration the actually shakes the front tires. As I mentioned before in other post I just got a nitro 750 bass boat. Tiny Tach website http://tinytach. Anyway, last weekend I flew my Rotax 447 powered Minimax for the first time since doing my 3 axis conversion, and noticed that the plane constantly tried to roll to the right. My new tachometer doesn't work - Prior to 2019 / Serial Number 5000: Some things to check before returning the tach: Is the tachometer needle on the wrong side of the stop pin? Symptom: You can rotate the pointer backward (CCW) from 0 to 60 but not from 0 to 10 (CW). I also want to add a analog tachometer, but I believe that I have to have my alternator modified for a pickup before I can do this. It goes through the 16 pin connector P(1)-13 and is labeled W25. An hour-meter for lawn mowers, garden tractors and a tachometer variety of small engines and generators. Also now the tiny tach resides on the left side of the cluster. Uses a transducer on the fuel line which must be the correct size for the line - 6mm. but never got around to trying it but has some useful info if your thinking of going down that path. the Tiny gets a plug wire wrap, just like the freebie. I used a gasser tach and added a hall effect sensor that reads off two of the crank pulley bolts. So it will be the VHX gauges for me. Mounted the tiny tach on the mill yesterday. I think it was a supertach II from Autozone, but I don't remember the size. Hi all, do anyone one has experience with fitting a Tiny Tach or equivalent on an fuel injected outboard? I have done it on the spark plugs which is very straightforward but wonder if this set up would work if you wrap the sender wire around injector. This article on how to wire an electronic tachometer doesn’t have anything to do with Project X other than that ’57 is the granddaddy to Super Chevy’s Chevelle. If I remember correctly the white wire goes to ground. For example the rod storage doesn't have dividers. since it has a front decklid and dash, I will install a flip-down panel behind the dash to put the tach on and it will fold up under the dash out of sight when not needed. Tiny Tach website http://tinytach. What is the update time? All models currently update every 1/2 second. Don't worry about the gear indicator, chances are if you get the tach working the gear indicator will work too. Tiny Tach installed Got my tach last week. Not sure how linear this instrument will be with engine speed. Have a problem with the El wire backlighting in the gauges. (Hobbyking:- For faulty items, please fill out an RMA/Claim relating to this item/order). Just installed the "Tiny Tach" I got from Ziller on my new 5242 13000-watt Guardian. The boat refused to get on step. If you want to add a tach you're out of luck, unless you buy this neat little box that creates a signal that the tach can read. I'm pretty sure I have a straight up DK35 I can't find anything in the paperwork I was given to indicate otherwise. Have a problem with the El wire backlighting in the gauges. Tiny Tach website http://tinytach. It has the factory analog hour meter plus a resetable hour meter on the tiny tach I added , plus a resetable job/hour meter in the speedometer, I guess were ok with hour meters , lol , I think I'll run the valoline atv oil to the 20 hour change , then put the Amsoil 10-40 in it , it will at least make me feel better!. Interesting enough the interior doesn't have as much room as the 2012 extended cab Colorado that I traded in. 25 2 stroke idle rpm range / tiny tach Discussion in ' Nobody has ever complained that the hour meter doesn't work. Which Tach? Bronco Chat. The range $10, $25, and $50 tachs probably all have the same technology/accuracy. It sends a signal to a unit that changes the tach signal to the same signal a 4 cylinder gas engine would put out. It was bought at an auction, so no PO to ask about it. [/quote ] I'm happy with my splitfire fire unit as well. Like I said, it's a tiny hole, a easy try with JB and if that doesn't work, nothing is lost but 10 minutues of your time. Option #4 is an item called Tiny Tach made by Design Technology Inc. Never had a tach to use, I guess I tune mechanically. Not sure how linear this instrument will be with engine speed. Then i cut two walnuts and one cedar log. It had a 1/4" "transducer" which seems to fit the fuel line ok. Never had a tach to use, I guess I tune mechanically. How do you install the Tiny-TachT? The gas tachs have a coax cable extending from the unit and ending with a red antenna wire and a white ground wire. The inductive pickup doesn't like the metal core wires. There must be a sequence of menu selections to get to a screen where I can rescale the existing tach from 20,000 to something more normal, but I haven't found it yet. Just installed the "Tiny Tach" I got from Ziller on my new 5242 13000-watt Guardian. Turn the tachometer over gently so that the backside is exposed. All New Standard Tiny Tach One Model Will Now Work With Most Gas Engines Rpm Reading Adjustable From 1 Spark Per 2 Revolutions To 8 Sparks Per Revolution Rpm Display From 1 To 19,000 Update Time 1/2 Second Hour Meter Records Total Actual Running Time On Your Engine Job Timer Can Be Reset To Record Fun Time For Record Keeping 6Ft. A tachometer is a good addition to any vehicle equipped with a manual transmission. Using a tach from a 6-cylinder model, while it will work, will only read 2/3 of actual RPM. Any bolt on fins etc will force the rear of the boat upward to put the boat on plane but the cost of doing that is more drag and less speed. Thats pretty cool , what kind of numbers did your engine make ? I have a tiny tach for diesels and it works very well , also keeps hours. The tiny tach was useless. Tiny Tach now makes a more expensive version that has no lag, but of course it's more money too. Here is a mod that was made on an LX150. It the placement of the tach. Power wire spliced into 12 volt wire. I'm working with a weighfeeder that uses a 3hp 180V 1750rpm DC motor controlled by a Bardac speed control. But I have also been looking at re-powering. This particular waveform makes the tach stop working above 4000 RPM because the 'off' time is too short. Don't throw out your dining room set just because it is looking worn or dirty. Do you think this tach would work for me? I dont want to buy a nice tach that I must mount, I really just want to check my RPMs once. See my '1990 Redo Transformation' for. Doe the Digital Tach respond in real time like and needle faced tach? Would the digital tach work for setting idle mixture setting?[/quote] Yes, yes and yes. What you have is commonly branded as "Tiny Tach" tachometer and hour meter. I've been thinking about a light sensor in the glow plug hole or a sound detector on an injector. I have a friend with a 1999 GMC, he came over and I put my cluster in his truck. The unit has an "idle control". Basically you can convert a signal then feed it to a 'normal' tach. Also now the tiny tach resides on the left side of the cluster. Sometimes not hooking up the ground for the Tachometer would make the engine meter work. The "sensor" lead is suppose to wrap around the a plug wire a few times and be cinched with a cable tie just like what you show in the picture. Destroked has this option and you'd probably still need a Dakota Digital interface to match you tach unless it's adjustable. As I mentioned before in other post I just got a nitro 750 bass boat. It starts instantly with very little throttle and idles, but with a vibration the actually shakes the front tires. i looked under for the speedo sensor and noticed all the wires are cut on it!. The moter runs fine but seems to be taching very high. or if it just doesn't work with an XS. Just looking for a step by step guide to find out why tach doesn't work. With this said, my buddy purchased a "Tiny Tach" 3-4 years ago (I think from GPASC) and it was not the Tiny Tach brand but it was identical in size. In all instances the tach is extremely sensitive to where it is placed, and doesn't seem to work any more than 4" away from anything, no where near 15 inches. My 2015 Nissan Versa Note has started making rattling noise when accelerating at low speed then the sound dies away when it reaches a certain speed. the tiny tach has 2 wires , red is rapped around the spark plug wire, and white is to ground, also with the tiny tach they have an internal battery that lasts only 3 to 5 years. The tiny tach was useless. Hi all, do anyone one has experience with fitting a Tiny Tach or equivalent on an fuel injected outboard? I have done it on the spark plugs which is very straightforward but wonder if this set up would work if you wrap the sender wire around injector. in a way your correct about the idle,that is the only thing that does get a little flaky,>>maybe cutting 1 would of been a little better for my idle. Gun control doesn't work. Converting the MGB Tachometer to V-8 Calibration By: Kurt Schley (This article appeared in Volume VIII Issue 1, January 2000. By that I mean, sometimes it doesn’t seem to actually engage when I turn it to the on position. I put the required 6 in pto on the 1811 and set the blower up as stated in the manual. Kev installed this full-sized tachometer on his Jackal. And my usual disclaimer: No, I do not work for Edge and Engine, or Stihl or Husqvarna, or any oil company, or DTI Industries or any tachometer company, nor do I get any financial payments, kickbacks or discounts from any of them for my posting here or anywhere else. I do know the tach uses the computer. I was considering one for the cockpit bulkhead (to be fitted under the companionway) and wondered how 'water resistant' the display actually is? I wouldn't expect it to be any more exposed than the chartplotter or the Fusion remote. See my '1990 Redo Transformation' for. It would fit great and all but the tach would work from the start. The hard part of this is the bent aluminum, which is a leftover bracket made at work. The central radio system is a joke, as is the tiny tach. Other factors inevitably come into play, so if something doesn't work as it should, change things around a bit. Also found out Tiny Tach (uses sensor which clamps around #1 inj line) that sensor is to large to fit our lines. – Built in Tiny Tach and do some hover work. Do you have a tiny-tach, hall effect or mechanical tachometer on your engine? Once the points gap is set, and the engine is running, set the carburetor throttle lever at one position (midrange - about 1800rpm) while looking at the tachometer slowly turn the distributor each way until maximum rpm is achieved. don't remember the brand but its not a tiny tach. If all this wire testing passes muster then you either have a bad tach or bad ignition module. The car has been stalling at slow speeds, as in a parking lot or driveway. I just checked by searching Tiny Tach installation instructions. -Bought a Tiny Tach TT2A to find out where my max rpms were on my 96' XP. Question is; how do I set my timing at 2000rpm if I dont have a tach?? I can judge by ear pretty good what 2000revs sounds like and hold it there but I won't be dead on im sure. Any electric tach that can be used for a 4-6-8 cylinder engine will work with it. The speedometer has similar symptoms: The needle fluctuates, sticks in one position, will not return to zero, will not register past a certain speed, reads slow or fast, the odometer does not register or it also just does not work. Maybe I just got a bad one. I know i'm suppose to wrap it around the spark plug wire but i dont even know where that is. The inductive pick-up attaches to the plug wire to make the tach operate. The Tiny Tac company should have sent me another one or asked that I send it back so they could fix it, but that's not policy apparently. At 12 to 15 MPH is 6,000 to 7,000 RPM normal or should it be lower?. service2 from 10-250 hours) Easy to install, Reliable and simple to operate Fast 1 second refresh rate 5' 6" length on the main lead wire NOTE: This tach will NOT work on. I have the same situation as you. July 4, 2016, 10:10pm #1. You can see that the input signal (pin 2 of the IC) after filtering is almost gone, but he tach will work with a very tiny signal, provided it crosses the trigger point of SourceVoltage / 2. I have a Tiny Tach; cheap to buy, but the response time is about 1. Just looking for a step by step guide to find out why tach doesn't work. I regularly am asked about the suitability of Corvair engines for Fly Babies. Started by Rail Dawg. The speedometer has always worked until this year and the tachometer has never worked. Here are two additional sources of information: The Corvair Engine. Especially when it comes to issues and repairs it's important to include as many images as possible to help our members diagnose your issue. I am old school having raced a 57 Chevy for numerous years. Two questions: I'm rewiring the tractor with a new wiring harness. i like to run tach’s on all my old junky motors, outboards and old snapper comet mowers. I've been doing some pretty extensive work on my g43 and was recently able to go out and test. Focker, Apr 30, 2018 Im also pleased that my mixed matched t-90 shifts great and doesn't pop out of second gear. Interesting enough the interior doesn’t have as much room as the 2012 extended cab Colorado that I traded in. It's a nice little tachometer and hour meter. Community Message Forum Photo Gallery Event Calendar Book Reviews Bronco Wallpaper. Started by Rail Dawg. It doesn't have to be much as long as at least one full coil is not touching it is good. I don't know anything about tachometers or motors, so I am not sure when my motor hits on each cylinder. So hope to get them painted and installed by the weekend. The newer ducati fires ever 180 where the points doesn't. I wouldn't mind getting my tach working (one works the other doesn't) - any tips on diagnosing the parts that needs to be replaced to get it working would be appreciated. The tiny tach on the iSport really sucks. I think it also helps when I hit a rock. (for a price) The real issue that jumps out at me is compatability with the dash circuit board. When people install a 1965 or later MGB 1800 engine in the MGA (fairly common actually) they lose the mechanical tachometer drive. Find many great new & used options and get the best deals for Tiny Tach TT2A Hour Meter & Tachometer at the best online prices at eBay! Free shipping for many products!. (fortunately, the seller had a money back policy ) Over last weekend, I was able to verify that the tachometer in my cluster is in fact working. It doesn’t hurt that it looks great too. My cable Tach on a L3710 is doing the same thing. Any of my search term words; All of my search term words; Find results in Content titles and body; Content titles only. It was bent, probably to bring the machine speed down (was running right at 11mph). Just installed the "Tiny Tach" I got from Ziller on my new 5242 13000-watt Guardian. It is a proximity sensor that mounts in a threaded hole in the bellhousing and senses the flywheel teeth as they pass it. Anyway the little side kickstand chopped it not all the way in half but pretty close and I tried to repair it but it still doesn't work. I'm working with a weighfeeder that uses a 3hp 180V 1750rpm DC motor controlled by a Bardac speed control. The tiny tach is a perfect digital signal 0-5v. Since they seem to work fine in similar planes like Pietenpols, they should work fine. I'm wondering if someone could help with mounting suggestions for an Engine Cowl to suit our Himax. The info system is way too small in font size; it should be a customizable display panel showing oil temp, oil pressure, and coolant temperature as a default setting at. I don't even use a rotor tach I see no use for one since like you, learned in a bare bones machine. My tach is reading low by about 2,000 rpm at upper end and 200 low at idle. The stumbling block right now is the governor. One TINY-TACH?. Two questions: I'm rewiring the tractor with a new wiring harness. Find many great new & used options and get the best deals for Tiny Tach TT2A Hour Meter & Tachometer at the best online prices at eBay! Free shipping for many products!. Doesn't anyone have any experience with those and how well they work? I don't want a full time tach on my motor and spending the $50-60 that a TT would cost just to check the rpm once or twice is a bit much for me. That said, six cylinders is six cylinders, and the tach doesn't know if the engine is a 2. I gutted my tach case and put the workings of a Sun super tach in. On many MG V-8 conversions, the last item to be addressed is often the modification of the tachometer (and usually speedometer too!) to V-8 mode. Unknown model - no info. My tractor doesn't seem to have the tach sensor that is in the photo either. fifty plus ship, will look into it if i dont go broke. Well I just recently installed a tach on my bug, if you read my gas leak post you would know some gorry details. It is a proximity sensor that mounts in a threaded hole in the bellhousing and senses the flywheel teeth as they pass it. Here is a mod that was made on an LX150. Great looking and nice features except the backward rotation tach doesn't cut it. However I've never used it out in the bright sunlight might effect it. Not sure how linear this instrument will be with engine speed. I wouldn't mind getting my tach working (one works the other doesn't) - any tips on diagnosing the parts that needs to be replaced to get it working would be appreciated. Asking for recommendations based on boat size, load, mtr size to anybody will give you a good start in respect to pitch and that's it. By installing the "Tiny Tach" transducer on the injection line, the Tiny Tach. A quick video showing how to install a Tiny Tach and how it works. Mine is also same when key is off turns power off to Tiny Tach. It doesn't have to be much as long as at least one full coil is not touching it is good. Any bolt on fins etc will force the rear of the boat upward to put the boat on plane but the cost of doing that is more drag and less speed. if it doesn't well you know what to do. Note #2:These auto manufacturers use tachometers made by different tachometer manufacturers. new question where is the best place on the 80 to hook up a tachometer ? doesn't need to be dead on but I want to tune this old girl and need to know where im at RPM wise. If you want something that is cheap and works, this is it, but don't expect much more. On progressive springs the lighter part may coilbind but that is okay as long as the entire spring doesn't. If even that doesn't work out, I'll have to revert back to the way people learned how to fly ultralights in the 1980's and self teach myself. You can spring for a REAL weld after that. Thanks also for the tinytach suggestion. JMO Note: the silver band on the diode goes towards the tach. If the air ride suspension doesn't work compressor. The fun doesn’t stop even when the sun goes down with the Super Rock Rey. Off-Topic Chat. Especially when it comes to issues and repairs it's important to include as many images as possible to help our members diagnose your issue. The tachometer quit working >yesterday. The common fix is to install the Smiths electric tach from a 1965-1967 MGB. It had a 1/4" "transducer" which seems to fit the fuel line ok. Connect the yellow wire to your lighting wiring. I unhooked cable from gen and turned it by hand. Tiny-Tach: Gasoline Tachometers. How do I check to see if it is the tach or the sending unit? My gas guage has stopped worked. Tiny Tach is a popular one of the second type. It sends a signal to a unit that changes the tach signal to the same signal a 4 cylinder gas engine would put out. Tiny Tach TT2A Digital Hour Meter / Tachometer - Adjustable Resettable Job Timer | eBay. You would think this would be an easy find using Google but can't find what I want. But i can multi task. He suggested the "Commercial" model was best for this bike (among other features, it reords max rpm on the last run), but talk to him about what will suit your bike best. If the air ride suspension doesn't work compressor. It appears to be off by a mile or two more than what the mileage actually is. The Destroked kit is $249 and the Dakota part is $84. With this said, my buddy purchased a "Tiny Tach" 3-4 years ago (I think from GPASC) and it was not the Tiny Tach brand but it was identical in size. Thanks also for the tinytach suggestion. Probably by only tiny fractions of an inch, though. Since your motor has no alternator, you are somewhat limited in what will work on it. Try a different length of wire or a thin metal rod, a different DMM, a different engine, etc. Why does your tachometer not work on my 2005 Kia Sedona? Counter strike doesn't work on windows 7. For a Tach, I'd get a tiny Tach and. 94 International with a Cummins motor and eaton 10 speed all gauges peg all the way and back but only the speedo and tach wont work once running. Some of the older farm tractors used a cable-driven tach like a speedometer, with a drive unit built into the back of the generator. It is extremely slow though in comparison to the Fast Tach. I like knowing the RPM while using the tractor. The first truck I plan on timing will be my 84 (no tach) and the others I plan on doing in the future are all later 7. Anyways, I used a monster tach mounted just below the ash tray. Dear all, I am looking forward to install a tachnometer on my bj40. Might be the problem. Obviously extreme over-rev can damage the engine, but we don't know what your RPMs are. I was wondering if anyone has any neat ideas on hooking it up a little. 5, Drilled slide,Tiny Tach,Performance CDI/COIL, Reinforced Front STRUTS,Steering Wheel Last edited by nam6869usmc on Tue Jul 11, 2006 12:46 pm, edited 1 time in total. 3 trucks, with a tach so no problem. How does your electrical generation work ?. Installing an hour meter on a Sears lawn tractor will let you know how long the engine has run. The tiny tach was useless. How do I check to see if it is the tach or the sending unit? My gas guage has stopped worked. I would like to buy a tachometer that I can get near the spark plug to test the RPM of my small engines. This is my first 2-stroke outboard. Bob: Those things are pretty neat but it won't work on any Detroit or a Cummins with the PT fuel system. Tiny-Tach makes a tachometer that installs simply by wrapping a wire lead around one of the spark plugs and grounding the other; it’s a little ugly but the price is good. Hi, If your like me and riding the bike in the high rev range you might be looking for a tacho. Some of the older farm tractors used a cable-driven tach like a speedometer, with a drive unit built into the back of the generator. I've been told that the 3600 rpm is the speed for supplying 60hz. Also, comes with a new gt2052 turbo. Kev installed this full-sized tachometer on his Jackal. Here are two additional sources of information: The Corvair Engine. Yes the tach shows the RPM's rising at that time but the engine is not revving with the transaxle slipping. Tiny Tach Diesel counters seem to be recommended quite frequently on the forum. I just ordered a elec/analog tach. Hey Norm: I have a Tiny Tach watching the engine RPM and i also have a digital bicycle speedometer watching the bandwheel speed. Anyway the little side kickstand chopped it not all the way in half but pretty close and I tried to repair it but it still doesn't work. Boom, now she does about 16. The cable has been disconnected and tucked up under the cowling behind the regulator. Governor not keeping them down to under 2000-2200? I tried a Tiny-Tach which works well on most engines. Units retail for $95 and read off an injection line. Can't read RPM's. Well I just recently installed a tach on my bug, if you read my gas leak post you would know some gorry details. Tiny Tach had multiple models in the past. Also I currently have a minn Kota 46lbs thrust troller. He suggested the "Commercial" model was best for this bike (among other features, it reords max rpm on the last run), but talk to him about what will suit your bike best. 1980 Tach Cluster (Full View) 1980 Tach Cluster (Close up) 81-84: '78 and up tachometer cluster will work as a "plug in and go", but you will not have use of your factory cruise control if the truck is an '83 or newer (the green box behind the speedometer). Who the heck needs a tachometer on a cruiser? Well, probably nobody but it's really sort of fun watching your engine lope along at 70 mph at 2500 rpm and you'll quickly realize you've been running your big 1500 or 1600 a lot slower than you'd thought around town. The Tiny Tach is indeed a marvel that I have just one issue with: no light! It would be twice as great if it had an option for backlighting the display. Looking for an old soul like myself. Also make sure the electrical leads do not contact any part on the engine that develops excessive heat, such as the exhaust manifolds. Sometimes not hooking up the ground for the Tachometer would make the engine meter work. You might check with Sunpro, or one of the other electronic instrument manufacturers to see what's available. The technology package provides information just don't wreck the truck while driving trying to find the information you are looking for. My Static RPM is 3050 on the ground. The tacho that was on the plane was a Tiny Tach, but I had to cut the wires in order to remove it, so now I've got to get another tacho, and as there's a grey wire coming out of the engine specially for one, I might as well use it. High RPM recall. I do like the size of the Tiny Tachand I hate to have to send it back since I have mounted it on my motor's tiller arm with screws! The hour reading seem to be accurate. 5avg/ 7010rpm. even closer on my junky truck. I plan to send both of these back and find something else that would work. Try the prop and if that doesn't work you need more hp. What intrigued me most was that it had more programmable options including the number of pulses per crank revolution. LS SWAP TACHOMETER PROBLEMS. Brand New!Tiny Tach hour meter and tachometer, all in one. If anyone is having issues with a tach needle bouncing or reading incorrectly you might try the 2 dollar Radio Shack fix before shelling out 30 bucks for a tach noise filter. so it doesn't load it down electrically. Once again, if you get this one, test it out to make sure it will work on what you want to use it on. (Hobbyking:- For faulty items, please fill out an RMA/Claim relating to this item/order). This Honeywell Hobbs hour meter says it's sealed but it doesn't say anywhere in the specs that it is waterproof. There are other economical solutions like the "Diesel Tiny Tach" available on line. 9 replies; 433 Safety Matters Language. This is the tiny tach and I. There are a few "treadmill conversion" threads here with varying amounts of information, but I thought I'd summarize my own experiences here in one single. max rpm is about 8000 or 7000 dont remember. Shop for the removable screen door seals, latches and gas springs. A word of advice; when you wrap the spark plug leads for the Tiny Tach, be sure to wrap both plug leads for one cylinder so the tach will still work when you do your mag tests. If you do a google shopping search for tach/hour meters $80-$100, there's basically none made specifically for small engines, but there are laser ones for fans, engine flywheels, anything that spins, but they don't have hour meters of course and someone here explained a flywheel should have a clean reflective. the Tiny gets a plug wire wrap, just like the freebie. I don't know anything about tachometers or motors, so I am not sure when my motor hits on each cylinder. Hey Norm: I have a Tiny Tach watching the engine RPM and i also have a digital bicycle speedometer watching the bandwheel speed. see more I called Design Technology who manufactures the tiny tach after receiving my tiny tach and they instructed me with my setup. can i use the stator for reference signal it being 24v for this tach. The tachometer has been working at 100%. While they work for a cheap way to check RPMs, the company doesn't stand behind their product even when its brand new! AL from Illniois. Getting on the water with a tach is the real test and only way to really do this right. i think i have read all the post and only 1 reference to tachometers. I guess this was done because the tractor has an alternator. OK it doesn't have the "looks" to go with a Kelvin, but does the Tiny Tach look that much different from a cycle computer ?. now works for most gas engines. Guages are a joke. The tachometer worked fine. I finally figured out why my super glide has been bugging me. Using a "Tiny Tach" electronic tachometer; Corvair Engines. The entire wire was ran perfect except for a stupid 2inch section where I just had a brain fart. i've been running tiny tach brand for a while now and jus recently trying cheapo ebay tach's. From the design of the dial, I'm guess it came from an 84-86 (or early 87) Cherokee or Comanche. poorman9, Jul 18, 2011. It doesn't take much altitude change to mess up the high-speed jet setting on a 2-cycle chainsaw and lose power or run too lean. The tach with the small gas gauge in it that Bake 74 mentions is probably the cleanest way to do this. This year I have a (new to me) 451 Blower on my 1811. Works good! the only real challenge was the needle, I had to ream the Datsun needle with a tiny little drill bit to get to the correct size. I found out why my tach doesn't work. the rpm tach does not move at all. Then the program just uses whatever the latest values are to do its work. I wound up buying a laser tachometer that uses a tiny reflective metal strip like foil tape and it works great. All Summit® tachs have black or silver faces with white or black digits, and include mounting hardware and a lighting kit. The transducer reads the fuel pressure pulse between the injection pump and the injector, neither of those engines uses an injection pump that generates the high pressure fuel inpulse that this particular device uses to work. On progressive springs the lighter part may coilbind but that is okay as long as the entire spring doesn't. I took it out the other day and the boat was a little heavier than I would like to see. The Vapor's lead is at the coil (optional). Totally different world in a 1600lb helicopter with a twist throttle. will somehow. In the morning when. As Rande stated, check the purple (ignition) and gray wire at the tach (sender) and ground wires on the back of the tach. I believe it's the ones with dual magnets. Classic tachometer quit. It says to wire to +12v battery and -earth, but doesn't mention if this should be swiitchable or not? I dont suppose theres too much in teh way of battery drain from one of these, but thought I'd ask how you wired yours. May cure a tach that is randomly jumping due to a slowly corroding tach filter. I don't know if the cold did something to it, if it will work after it warms up, or what might have happened.