99' 150 Ocean Pro Idle probs
First, I am new to this board and found it out of desperation.<br /><br />I have a 1999 150 Johnson Ocean Pro. It starts fine at the ramp. Runs great until I shut it down for a 1/2 hour or more - after the engine has run for 30 minutues or longer (hot condition). It starts rough and idles poorly after that, stalling, sputtering and "missing" - kind of a like a sneeze. I know it is gasping for fuel. Sometimes when we accelerate it will stall when the motor is put under load. Other times it will idle fine at 650 RPM, then around 1,000 RPM it sputters and stalls.<br /><br />I bought the boat used from a Grady White Dealer and it had impecable maintenance records. I had a compression test done it prior to purchasing the boat. It all checked out. I had the power pack replaced, new plugs (none where fouled), new fuel filter, fuel/water separator filter replaced. Recently we had the boat for this problem at an OMC/Bombardier factory authorized warrenty center and they too could find nothing wrong, except they adjusted the the carb throttle linkage.<br /><br />I have a 60 gallon tank in the boat and changed up fuels and grades. I have added fuel additives to reduce gas line freeze (water in the gas), clean the jets and so forth. I typically use the boat once or twice a week for extended periods of time. I can burn 60 to 90 gallons of fuel in a weekend.
<br /><br />I reserached the posts on this site and found a couple messages that are similar, but the not the same. I apologize if somebody recently answered a similar post. So please indulge my request for insight to the problem. I would appreciate any ideas that you may have.<br /><br />Thanks
First, I am new to this board and found it out of desperation.<br /><br />I have a 1999 150 Johnson Ocean Pro. It starts fine at the ramp. Runs great until I shut it down for a 1/2 hour or more - after the engine has run for 30 minutues or longer (hot condition). It starts rough and idles poorly after that, stalling, sputtering and "missing" - kind of a like a sneeze. I know it is gasping for fuel. Sometimes when we accelerate it will stall when the motor is put under load. Other times it will idle fine at 650 RPM, then around 1,000 RPM it sputters and stalls.<br /><br />I bought the boat used from a Grady White Dealer and it had impecable maintenance records. I had a compression test done it prior to purchasing the boat. It all checked out. I had the power pack replaced, new plugs (none where fouled), new fuel filter, fuel/water separator filter replaced. Recently we had the boat for this problem at an OMC/Bombardier factory authorized warrenty center and they too could find nothing wrong, except they adjusted the the carb throttle linkage.<br /><br />I have a 60 gallon tank in the boat and changed up fuels and grades. I have added fuel additives to reduce gas line freeze (water in the gas), clean the jets and so forth. I typically use the boat once or twice a week for extended periods of time. I can burn 60 to 90 gallons of fuel in a weekend.
<br /><br />I reserached the posts on this site and found a couple messages that are similar, but the not the same. I apologize if somebody recently answered a similar post. So please indulge my request for insight to the problem. I would appreciate any ideas that you may have.<br /><br />Thanks