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Author Topic:   Which tiny tach to buy?
Erik posted 06-01-2001 08:43 PM ET (US)   Profile for Erik  
Which tiny-tach should I buy for a 2-stroke outboard? There are 3 diffrent models to chose from:

2C is used when there is one spark plug firing on each resolution of the crankshaft.

4C is is for engines which have a spark every two revolutions of the crankshaft such as those with a distributor driven crankshaft.

1C is for twin cylinder engines with a spark firing every 180 degrees of the engine crankshaft.

Dick posted 06-01-2001 09:01 PM ET (US)     Profile for Dick  Send Email to Dick     
What motor do you have?
Teleflex makes several models of universal outboard tachometers which have a selector switch on the back to set it up for the number of poles in your alternator.
Most newer motors have 12 pole alternators which would be the 6P position on the switch.
Erik posted 06-01-2001 11:11 PM ET (US)     Profile for Erik    
No it has to be a tiny tach cause the engine is a Mercury 15hp so it has to be portable. Im gonna bolt it on somewhere next to the pull start probably so a teleflex tach would look quite out of place.-Erik
whalernut posted 06-02-2001 02:31 AM ET (US)     Profile for whalernut  Send Email to whalernut     
Dick, do you know if an Airguide Tach from the 60`s will work on a 1975 85h.p. Johnson. The Tach instructions say for motors with points or 12 volt system? Regards-Jack Graner.
dgp posted 06-02-2001 07:10 AM ET (US)     Profile for dgp  Send Email to dgp     
Erik, Mercury Quicksilver offers a small rectangular digital tach and resettable hourmeter. I think they call it a Service Monitor. It's inductive powered from the spark plug wire.
Have your Mercury dealer check his Accessory Catlog for the correct P/N. Don
triblet posted 06-02-2001 08:49 AM ET (US)     Profile for triblet  Send Email to triblet     
That Quicksilver tach sounds like Mercury
is reselling the tiny tach. This thread
got me to do a web search on tiny tach.
That thing crops up everywhere: PWCs,
powered parachutes, lawn tractor pulling,
... ;-).


Dick posted 06-02-2001 09:53 AM ET (US)     Profile for Dick  Send Email to Dick     
Those old tachometers were pretty universal, about the only thing that would fry them was a Mercury. It should work.
whalernut posted 06-02-2001 10:29 AM ET (US)     Profile for whalernut  Send Email to whalernut     
Thanks Dick-Jack. P.S. Were they all Stainless Steel as this one is, and was $43.50 a good price for a new one as I paid? It looks very classic with the old car guage look.
Erik posted 06-03-2001 04:43 PM ET (US)     Profile for Erik    
I just took a look at mercury Quicksilver Service Monitors but there so expensive. The tiny tach is about $40 and the service monitors are about $60.They are the same thing with diffrent names basicly. If no one knows which tiny tach i should by I might not have a choice but to by mercury's.-Erik
Erik posted 06-12-2001 07:37 PM ET (US)     Profile for Erik    
Doesn't any one know which tiny tach to buy? Please Please Help!
TampaTom posted 06-14-2001 02:39 PM ET (US)     Profile for TampaTom  Send Email to TampaTom     
If you have a 15 HP Merc 2 cyl, 2 stroke, you would want the 1c model. If you have a 4 stroke, the 4c model.

If not sure, check this link, or call them.

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