Adding a tach to my Vanguard 18HP

DanoHB

I just dropped in my new Vanguard (other one broke a valve, punched a hole in piston, and tore up the head). I want to install a tach so I can monitor the RPMs better. Anyone done this? If so, which one and where did you get it? I bypassed the governor and want to make sure not to over rev it now. Also, what do you hook one up to, since we have no coils on this thing? Any help is appreciated.

I have taken off the starter from the engine and am running a stater (starter/alternator) that I had on their previously.

BGW

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1989Marathon

TinyTach makes a digital one for these small engines. Equus is also a good option. The digitals seem to have slow response time, but the analog ones don't. You should really think about installing a rev-kit and stronger pushrods.
The motor has 2 coils. It wouldn't run without them.

DanoHB

Will installing the pushrods and rev limiter void the new warranty. I just bought the engine so it has a 3 year warranty. I didn't remove governor, just used a linkage to bypass the governor spring. Without that, it was only running at about 8-10 mph. Now is back to normal over 30.

DanoHB

Ok, what wire do I connect it to on the coils? Do I attach to one or both? Just wanna know RPM range I am running at this point.

1989Marathon

The wire from the TinyTach just wraps around one of your spark plugs wires and picks it up inductively.

1989Marathon

I would think that any mods to the motor would void the warranty, especially disabling the governor.

Dave in VA

The Eqqus 8068 works great. The inductive pick-up attaches to the forward plug wire.

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This may help you, too.
http://www.buggiesgonewild.com/big-b...ital-tach.html

sassycat

i love that lil tack dave in va im sure it will work just as well with a 13hp honda..did it com from e bay? have a link,thanks

DanoHB

I got the digital one. It says to attach to spark plug wire. Works great. Now what do i set it at? How many times does spark plug fire per revolution? I have it set at one per revolution. Is that right? Options are once per, two per, or every other. Please help so i make sure is reading correctly. Thanks.

Dave in VA

Thanks--Got it locally at O'Reilly Auto Parts. It should work on anything with 1-12 cylinders. I haven't driven it that much since the install, but it seems to work well.