Home › Forum › Ask A Member › 1970-ish Yamaha Mariner 8 runs erratic. Can you tell me why? › Re: 1970-ish Yamaha Mariner 8 runs erratic. Can you tell me why?
September 26, 2016 at 9:36 am
#44728
quote BillW:
If it is the fuel pump or something like that, you should be able to pump the primer bulb and have it run well again. Usually when Yamaha pumps go bad, they idle poorly because gas goes into the crankcase. If you pump the bulb and it doesn’t help, I would revisit the carb, particularly the area between the fuel inlet nipple and the float valve.
If THE OWNER HIMSELF replaced the diaphragm, then, yeah, I would suspect he messed something up….
(You’re sure it’s not overheating, right?)
Long live American manufacturing!