1989 40hp high altitude

pcrussell50

Petty Officer 1st Class
Joined
Sep 21, 2008
Messages
296
just got an oil injected 40hp yamaha from an owner who doesn't know much about boats or engines, but said the carb was "adjusted" for where he used it, which was a lake at 7000 foot level. i live at sea level.

so, do these carbs have adjustable mixture or fixed orifices for open throttle use?

-peter
 

donrjuan

Seaman Apprentice
Joined
Jun 9, 2009
Messages
39
Re: 1989 40hp high altitude

You and I are in the same,... well boat only I am trying to adjust for high altitude. I posted "Merc 60 high altitude" most of what we discuss there could possibly be applied to you in reverse. I am currently looking at rejetting mine. It may be wht you need as well but I am still debating for mine.
 
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