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Marine Tachometer on Ebay
by
JDiesel
on 07 Mar, 2012 12:07
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Hey Dieselers,
I'm looking at a marine tach on ebay for my 1.6 rabbit.
It says this:
This 12 volt, illuminated tach will work for 80-100/110-140/140-170/170-200 teeth diesel motors. It uses a 3 1/4" cutout and measures 3 3/4" across the face including bezel.
There is an adjuster knob on the back for those 'teeth' settings. Will one of them work on the rabbit?
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#1
by
R.O.R-2.0
on 07 Mar, 2012 12:43
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sounds like the tach in question is meant to read off a reluctor ring, and these diesels have no such thing..
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#2
by
camboscams
on 07 Mar, 2012 15:45
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Ummm, Flywheel teeth? that's how industrial stuff does it. it could be as easy as drilling a hole in the bell housing. Hopefully his flywheel has at least 80 teeth.
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#3
by
JDiesel
on 07 Mar, 2012 15:52
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Yep

Flywheels good. Forged in Germany, just put a new clutch in.
What I am looking for is a marine diesel tachometer for that W terminal. Is there a specific one that works good? Any recomondations? <=$50.00
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#4
by
8v-of-fury
on 07 Mar, 2012 19:03
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The only problem with most marine diesels are that they are bigger 5 or 6 cylinders.. and they only spin 3.5-4k rpm.. So a tach from them wouldn't be too useful as we can spin our motors to 6k.
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#5
by
ORCoaster
on 07 Mar, 2012 19:31
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Upshift man, don't you know what the 5th speed is for? LOL.
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#6
by
8v-of-fury
on 07 Mar, 2012 19:32
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I do mostly in town! LoL when it was my 1.6NA i was mostly above 4000rpm too! lol 5th gear.. pfft!
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#7
by
Baron VonZeppelin
on 07 Mar, 2012 21:08
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JDiesel, that "might not" have been a diesel specific tacho.
But anyway - you should find plenty diesel marine/tractor tachs on eBay that operate from an alternator signal. I used to find them for $40-60 new on eBay.
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#8
by
JDiesel
on 07 Mar, 2012 23:15
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#9
by
bajacalal
on 07 Mar, 2012 23:36
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No, some use a hall-effect type sensor, like a crankshaft position sensor on a gas engine or an ABS wheel sensor, with a ring that has teeth, often those are usually somewhat specific to the engine they're used on. I think optical sensors are another possibility but I've never seen this.
And some really old stuff is all mechanical, like a speedometer cable that comes off the engine.
Oh, and there some tools out there that measure RPM by the engine vibrations.
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#10
by
Baron VonZeppelin
on 08 Mar, 2012 00:08
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#11
by
Baron VonZeppelin
on 08 Mar, 2012 00:12
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I had to fix that search link
Believe its working right, now.
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#12
by
R.O.R-2.0
on 08 Mar, 2012 07:12
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here ya go.. idk why this cant be rigged up for under 40 bucks.. i did it for free.
http://www.vwdiesel.net/forum/index.php?topic=30442.0after you build this setup, you can drive any aftermarket GASSER tach with it.. dont need diesel specific one.
i have NOT figured out how to make it operate a stock VW tachometer yet tho..
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#13
by
ToddA1
on 08 Mar, 2012 19:59
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Wasn't jimbote running a standard VW gas tach? Maybe the Ford sensor he used put out a stronger signal?
-Todd
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#14
by
R.O.R-2.0
on 09 Mar, 2012 11:03
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Wasn't jimbote running a standard VW gas tach? Maybe the Ford sensor he used put out a stronger signal?
-Todd
prolly used a DSL 1.. or some other type of setup.. cause im using a strong pickup, and it doesnt even make a stock tach budge..