I pulled the fuel filter off, cleaned it with isopropyl alcohol, and dried it. Remounted and went out with the engine cover off. Just like a few days ago, after about a minute at full throttle, the engine dies down
. If I pull the choke out in time, the engine can keep running, so I did that in order to motor
back into the marina.
As I idle the engine, the choke can stay in, and if I try to increase the RPM
slowly, I can hear it starting to change the sound, and further increase kills the engine.
When I moored up, I saw a layer of fuel on the surface of the water
. I know it only takes a few drops to look like a lot, but it was quite an area.
Inside the engine, it seemed dry, couldn't see or smell fuel coming out. Someone told me it seemed like the fuel came from the exhaust
So for the minute or so that it runs at full throttle, it's absolutely fine - normal response to throttle and no misfiring, lack of power or wrong sounds. But then it suddenly dies off.
I am quite sure (from what I can deduct with my limited experience with engines) it's fuel starvation by lack of flow into the float bowl at higher engine speeds. So when the engine runs idle or close to idle, enough fuel comes in, when it's at high speeds, it empties the float bowl down to where it cannot draw fuel any more.
Applying the choke partly should explain that.
But how about the fuel spill - could the fuel I am missing at high speed be that same fuel being dumped into the water (through the exhaust
Unless there is a clear diagnosis here, I will tend to just "call a friend", i.e. $$$