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  Getting '94 Yamaha c85 for Montauk, ? re: tach, bracket, prop

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Author Topic:   Getting '94 Yamaha c85 for Montauk, ? re: tach, bracket, prop
Kelly posted 06-06-2002 11:08 PM ET (US)   Profile for Kelly   Send Email to Kelly  
Found a used '94 Yamaha c85 and an am going to put it on my Montauk. First, I was wondering, do I need to get a tach? I know it is nice, but does it really make that much difference for an older basic motor like this. Is there an inexpensive alternative to a Yamaha tach that could be used mainly just to check rpms at wot?

Second, I was thinking about a bracket, not really to improve performance that much, but more to be able to raise the motor for shallow slow running and to avoid adding holes in the transom now and if I got another motor in the future. I was thinking about a CMC model.

Third, my current motor is an '87 70 hp Johnson with a stainless steel prop. The new motor has a stainless steel prop also. Would the Johnson prop fit the Yamaha? Could it be made to fit reasonably and be used as a spare?

These where the questions that came to mind, if you have other comments let me know.

Thanks, Kelly

jimh posted 06-07-2002 12:47 AM ET (US)     Profile for jimh  Send Email to jimh     
You can use an aftermarket, generic Tachometer with the Yamaha engine. I would recommend you have a tach so you can judge the engine speed at wide-open. Over-revving the engine could be dangerous.
John from Madison CT posted 06-07-2002 06:45 AM ET (US)     Profile for John from Madison CT  Send Email to John from Madison CT     

Those really neat Yamaha digital tachs can be found on Ebay for less than half of new dealer prices. Not only do they show RPM's but also, Overheat and Oil reservoir levels. (if applicable).

Keep an eye out on ebay.


Soho posted 06-07-2002 07:50 AM ET (US)     Profile for Soho  Send Email to Soho     

I have a tach from my old 90 - 90hp Yamaha. If this would work, it should ? - I can send it to you. Let me know if you want it.



Bigshot posted 06-07-2002 11:26 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
The older tach will work on that 85. A 13x17 SS prop will be perfect as well. You can have the OMC prop rehubbed($50) to fit a Yamaha.

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