Marine Tachometer on Ebay - page 1 - General - VWDiesel.net The IDI, TDI, and mTDI source.

Marine Tachometer on Ebay by JDiesel on 07 Mar, 2012 12:07
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?
#1 by R.O.R-2.0 on 07 Mar, 2012 12:43
sounds like the tach in question is meant to read off a reluctor ring, and these diesels have no such thing..
#2 by camboscams on 07 Mar, 2012 15:45
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.
#3 by JDiesel on 07 Mar, 2012 15:52
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
#4 by 8v-of-fury on 07 Mar, 2012 19:03
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.
#5 by ORCoaster on 07 Mar, 2012 19:31
Upshift man, don't you know what the 5th speed is for? LOL.
#6 by 8v-of-fury on 07 Mar, 2012 19:32
I do mostly in town! LoL when it was my 1.6NA i was mostly above 4000rpm too! lol 5th gear.. pfft!
#7 by Baron VonZeppelin on 07 Mar, 2012 21:08
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.
#8 by JDiesel on 07 Mar, 2012 23:15
Well I'm trying really hard not to be out $40 on ebay... do all diesel tachs work on an alternator signal?

What about something like this?
http://www.ebay.com/itm/60MM-Stepper-Motor-DIESEL-TACHOMETER-RPM-GAUGE-METER-/220704701680?pt=Motors_Car_Truck_Parts_Accessories&hash=item3363067cf0&vxp=mtr#ht_5914wt_939
#9 by bajacalal on 07 Mar, 2012 23:36
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.
#10 by Baron VonZeppelin on 08 Mar, 2012 00:08
http://www.ebay.com/sch/i.html?_nkw=diesel+tach*&_in_kw=1&_ex_kw=&_sacat=See-All-Categories&_okw=&_oexkw=&_adv=1&_udlo=&_udhi=&_ftrt=901&_ftrv=1&_sabdlo=&_sabdhi=&_samilow=&_samihi=&_sadis=200&_fpos=Zip+code&_fsct=&_fsradio2=%26LH_PrefLoc%3D1&_sargn=-1%26saslc%3D0&_salic=1&_saact=1&LH_SALE_CURRENCY=0&_fsradio=%26LH_SpecificSeller%3D1&_saslop=1&_sasl=&_sop=15&_dmd=1&_ipg=200

There are several interesting ones listed.

You'll need to contact sellers and ask about alternator/generator signal - if its not listed in the auction. If they don't know - you might can google the part number/name of product and get more info.

Use diesel tach* just like that with the wildcard asterisk for search term. Then lowest price+shipping.

Check them all out - all the way to the end. Because sometimes there will be some cheap ones at the end of page due to shipping cost not being listed.

For example - like this one that comes listed at bottom after a $15,000.00 item.
http://www.ebay.com/itm/Volvo-Penta-Marine-Tachometer-taken-off-MD2B-inboard-diesel-/130658576273?pt=Boat_Parts_Accessories_Gear&vxp=mtr&hash=item1e6bdba791
#11 by Baron VonZeppelin on 08 Mar, 2012 00:12
I had to fix that search link
Believe its working right, now.
#12 by R.O.R-2.0 on 08 Mar, 2012 07:12
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=30442.0

after 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..
#13 by ToddA1 on 08 Mar, 2012 19:59
Wasn't jimbote running a standard VW gas tach? Maybe the Ford sensor he used put out a stronger signal?

-Todd
#14 by R.O.R-2.0 on 09 Mar, 2012 11:03
Quote from: ToddA1 on 08 Mar, 2012 19:59
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..