I have an '86 150 Yanaha that has begun to act peculiar. When at 3000 RPM and higher engine will "surge" about 500 RPM for a few seconds then drop back to original RPM. Does not do this at idle. Only at hegher RPM. Feels like a fuel problem. Does anyone have any ideas about what to look for? Perhaps the fuel filter?<br /><br />Any thoughts appreciated. Thanks
