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?
This certainly seems like a fuel delivery problem of some sort. I’d try pumping the bulb when it starts to stall out first, as was mentioned before. If that makes it take off again the fuel pump is suspect.
If it ends up not being the fuel pump, I’d check out the carburetor. Maybe the high speed circuit is partially blocked, maybe the float leve.is set too low, maybe both, maybe there is a partial blockage in the path between the output of the pump and the float valve in the carb.
Question: is it my imagination or does the tiller grip twist clockwise on this motor to throttle up? I’d have a rough time getting used to that.
-Ben
OldJohnnyRude on YouTube