posted a couple weeks ago about a power loss after warming up- finally found time to go through and clean the carbs this weekend and everything seemed to run well with no power lapses. However, I did notice my fuel gage fluctuating with my throttle speed- not just shifting fuel... The fuel gage is just the cheap aftermarket unit, not the Yamaha. with the ignition on/engine off I was reading 1/2, got the same reading at idle after starting. As I increased the throttle, up went the fuel gage to full at full throttle. It seemed to follow my throttle settings, but when I go back to idle it would only go back down to 3/4. Turn the ignition off and back on, it resets to 1/2??? Is my voltage regulator bad or maybe just the tank sensor? thanks for the help, and could this be related to the previous power loss problems?<br /><br /><br />Old post:<br />2003 90hp yam 2-stoke w/ 90 hours. I took the boat out the other week (after sitting about 5 weeks) and it started fine throttled up fine ran about 2 or 3 minutes then bogged down. Didn't sound like a fuel problem, but that was the easiest place to start, so I installed a canister fuel filter, new under cowl filter and a new fuel pump. After 2 more sea trials the symptoms are still persisting. She boggs down to about 1500rpm (no warning buzzer, full of oil and head still cool/warm to touch)after about 2-3 minutes. Seems to idle fine and will throttle up fine in nuetral with no load. During my sea trials it has come back and run fine for a minute and then the problem persists. My warrenty ran out the day before the problem occured- however the dealer took it in last week "under warrenty" and now I'm stuck with a $350 repair bill for them to tell me they couldn't get it to mess up/don't know...they did put it on a dyno to load it up.... still no good. Where do I start now? I have thought that if it were a carb problem, I would have more low end problems or a more consistant problem? Power pack? ? ?
