This is an odd thing that happens but I put the 17ft boat in the water, start the motor very easily and then for the next 15-20 minutes or so it runs great, smooth and revs fine. Then all of sudden it reduces speed and won't go past half throttle, like it is running on one cylinder though still smooth without misfiring. If I push the throttle to full it tries for a second to rev but then stays half throttle. When I rev it in idle it runs just fine but back under a load...no go. It seems like not enough gas is getting through... Finally when I was approaching the dock and ramp at slow idle it was stalling - again seemed like no gas...
Some thoughts were:
* Carburetor issues though both were recently taken off and cleaned. All seemed to be clear.
* Crack in cylinder so when it heats up it loses compression but that should have happened much quickly than 20 minutes. It is not overheating as water pump is working fine.
* Acceleration linkeage has no slippage.
* Could it be a faulty fuel pump? Checked the flow to carbs and both were strong. Could the pump lose its efficiency after a while?
* New fuel and tank cap is loose for air
* Fuel hoses are fine (no leakage) and I have fixed some faulty wiring
I am not an expert engine mechanic but fairly handy so am trying to get some guidance so I can feel confident about going out with the family. I will tackle most anything...
Any input is much appreciated!! Thanks.
Some thoughts were:
* Carburetor issues though both were recently taken off and cleaned. All seemed to be clear.
* Crack in cylinder so when it heats up it loses compression but that should have happened much quickly than 20 minutes. It is not overheating as water pump is working fine.
* Acceleration linkeage has no slippage.
* Could it be a faulty fuel pump? Checked the flow to carbs and both were strong. Could the pump lose its efficiency after a while?
* New fuel and tank cap is loose for air
* Fuel hoses are fine (no leakage) and I have fixed some faulty wiring
I am not an expert engine mechanic but fairly handy so am trying to get some guidance so I can feel confident about going out with the family. I will tackle most anything...
Any input is much appreciated!! Thanks.
