Tach. for 25HP Mercury

Riverman 0128 · Jul 28, 2006

I have a Mercury 25XD with manual start. What are my options for installing a tach.? Can someone tell me how to hook the tach. up? Thanks for all help!

jeffkrol · Jul 28, 2006

Re: Tach. for 25HP Mercury

Does it have an alternator ?

Riverman 0128 · Jul 29, 2006

Re: Tach. for 25HP Mercury

jeffkrol said:
Does it have an alternator ?

I'm not sure if it has an alternator. How can I tell for sure?

Barnacle_Bill · Jul 29, 2006

Re: Tach. for 25HP Mercury

Look for 2 yellow wires coming from under the flywheel going to a rectifier. Or check the voltage at the battery while the motor is not running, then start it and see if the voltage goes up. Or plug your serial no in here http://www.mercurypartsexpress.com/PartsExpress/ProductSelection/ServiceParts/sphome.asp?CID=
and check the parts lists.

jeffkrol · Jul 29, 2006

Re: Tach. for 25HP Mercury

Ther's always the Tiny Tach. Sorry no idea on how well they work. Nice idea though...... Maybe someone here has some familiarity.
http://www.tinytach.com/tinytach/fqa.html

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Tach. for 25HP Mercury

Riverman 0128

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