Hello everyone I am new to the forum glad to join a bunch of knowledgable gentlemen as yourselves. So hears what I have for you Im sure you have heard it a million times. But I really need the help.
Take the boat out first weekend of the year using premium fuel, stabil, and quicksilver two cycle oil 50:1 Runs like a champ.
Second time out motor begins surging at WOT. Almost like someone flicking a switch on and off hit 4500 drop to 38 instantly pick back up and drop, So I thought surely fuel is the problem. So I brought it home replaced everything from the tube pick all the way to the fuel pumps. Everythings tight no leaks no air.
So I take it out today go for wot motors a little hesitant getting off the line but does once it does it runs up to 4200 and like a switch first it falls to 3800 and then like a second switch falls to 3200 and will stay there all day no problem no missing overheating alarms nothing.
So as soon as is starts dropping I checked the inline fuel filter it was full and the fuel primer bulb was still firm. The carberators were all taken off and cleaned they were freshly rebuilt last year. I noticed like someone else did when I took my front cover off I had some oil/fuel residue left on the face of the cover attached to the carbs. I'm going to replace pumps but if the inline was still full and the bulb still firm could that be the problem. Checked vent valve I could blow through it no problems checked pickup tube and replaced fuel lines.
Idles great real smooth usually no hesitation when coming off the line just started that this time around. The plugs were a little black around the edges but the electrodes were tan when I took em out and cleaned them. I don't know I'm lost and I know nothing bout the electronics. My alternator is charging well stays at or around 13v when wide open.
Take the boat out first weekend of the year using premium fuel, stabil, and quicksilver two cycle oil 50:1 Runs like a champ.
Second time out motor begins surging at WOT. Almost like someone flicking a switch on and off hit 4500 drop to 38 instantly pick back up and drop, So I thought surely fuel is the problem. So I brought it home replaced everything from the tube pick all the way to the fuel pumps. Everythings tight no leaks no air.
So I take it out today go for wot motors a little hesitant getting off the line but does once it does it runs up to 4200 and like a switch first it falls to 3800 and then like a second switch falls to 3200 and will stay there all day no problem no missing overheating alarms nothing.
So as soon as is starts dropping I checked the inline fuel filter it was full and the fuel primer bulb was still firm. The carberators were all taken off and cleaned they were freshly rebuilt last year. I noticed like someone else did when I took my front cover off I had some oil/fuel residue left on the face of the cover attached to the carbs. I'm going to replace pumps but if the inline was still full and the bulb still firm could that be the problem. Checked vent valve I could blow through it no problems checked pickup tube and replaced fuel lines.
Idles great real smooth usually no hesitation when coming off the line just started that this time around. The plugs were a little black around the edges but the electrodes were tan when I took em out and cleaned them. I don't know I'm lost and I know nothing bout the electronics. My alternator is charging well stays at or around 13v when wide open.
