humbucker427
New Member
A little bit of background: It has 84 hours and just had the supercharger rebuilt. I also just changed the plugs today.
So, on the trailer it runs just fine. Revs nicely with no indication of trouble. When I get it in the water it starts and idles perfectly. Only when I give it throttle does it bog down and starts knocking intermittently. Like one knock every second or second and a half. It sounds like someone is hitting the engine with a hammer. I don't have to give it much throttle at all for this to happen. When I back off to idle, it will idle all the way back to the shore with no problem. Only when I give it gas.
It doesn't show any codes and the engine temp remains low. This is the first time I've had it in the water this year, and it ran perfectly fine at the end of last year.
The fuel is from August of last year, and it's non-ethanol. Also, I'm not 100% sure I put stabilizer in it. I think I did, but I'm not positive.
Any ideas?
So, on the trailer it runs just fine. Revs nicely with no indication of trouble. When I get it in the water it starts and idles perfectly. Only when I give it throttle does it bog down and starts knocking intermittently. Like one knock every second or second and a half. It sounds like someone is hitting the engine with a hammer. I don't have to give it much throttle at all for this to happen. When I back off to idle, it will idle all the way back to the shore with no problem. Only when I give it gas.
It doesn't show any codes and the engine temp remains low. This is the first time I've had it in the water this year, and it ran perfectly fine at the end of last year.
The fuel is from August of last year, and it's non-ethanol. Also, I'm not 100% sure I put stabilizer in it. I think I did, but I'm not positive.
Any ideas?
