Ever since I've had the motor ( 3 mons. ) it's not run good - acted like fuel starvation - sucking air..etc. Wouldn't idle good - hard to start ( hard to get primed ) etc.... It'll run good for few hrs. then it won't run.
When I bought the boat\motor the oil injection system had already been disabled and the I thought the VRO part of the fuel pump had been sealed off properly.
I resealed the VRO part of the pump - replaced the primer ball - replaced fuel lines from tank to fuel pump - new Atwood fuel filter - new Atwood fuel\water separator filter - new plugs - drained all carb bowls ( no trash ) - de carbed the engine - checked the compression, they're all within 10 psi of eachother and all in the 108 to 115 psi range.
Took the boat off shore two weeks ago - ran fine @ WOT for 2.5 hrs. getting offshore and ran good anything above 8 mph.... Anything below that speed, it didn't want to run - you'd have to pump the ball to get it to stay running. It would troll speed for a couple mins then you'd have to pump the ball again. On the way in it ran WOT for 2 hrs....not a problem. Got to the ramp to load the boat and it starts not wanting to stay running ( pump the ball again. ( Note: prior to taking it offshore I had taken it to the lake the week before it ran great all day - no problems. I thought I had fixed the problem with a single thing I had done or a combination of things - I was wrong ) A real pain in the butt.
Pulled the trigger on a new non VRO fuel pump last week. Took the boat to the lake today. Ran the boat for 1.5 hrs at all speeds - boat ran great - boat tied to dock for 45 mins. - ran down the lake for 15 mins..boat ran great. Boat sat for 3 to 4 hrs.. Could hardly get the motor to start after sitting for the 3 or 4 hrs. - couldn't seem to get it primed - when I did get it started it would cut off when you gave it trottle. It never ran good the rest of the day - it would hardly run at all.
Obviously the fuel pump isn't\wasn't the problem - waste of time and $$$$. This problem, what I think is a fuel problem has been going on since the first of April. The carb. fuel lines look good but I guess I can replace them also. I've checked and rechecked for cracks in vac and fuel lines...I've not found a bad line yet. Could be a crack in a plastic male nipple somewhere.
Any ideas would be greatly appreciated at this time...I'm at the end of my ideas. It runs good then it doesn't want to run at all. After the new fuel pump and after the first 1.5 hrs it seems to run worse than ever.
Ideas...?
When I bought the boat\motor the oil injection system had already been disabled and the I thought the VRO part of the fuel pump had been sealed off properly.
I resealed the VRO part of the pump - replaced the primer ball - replaced fuel lines from tank to fuel pump - new Atwood fuel filter - new Atwood fuel\water separator filter - new plugs - drained all carb bowls ( no trash ) - de carbed the engine - checked the compression, they're all within 10 psi of eachother and all in the 108 to 115 psi range.
Took the boat off shore two weeks ago - ran fine @ WOT for 2.5 hrs. getting offshore and ran good anything above 8 mph.... Anything below that speed, it didn't want to run - you'd have to pump the ball to get it to stay running. It would troll speed for a couple mins then you'd have to pump the ball again. On the way in it ran WOT for 2 hrs....not a problem. Got to the ramp to load the boat and it starts not wanting to stay running ( pump the ball again. ( Note: prior to taking it offshore I had taken it to the lake the week before it ran great all day - no problems. I thought I had fixed the problem with a single thing I had done or a combination of things - I was wrong ) A real pain in the butt.
Pulled the trigger on a new non VRO fuel pump last week. Took the boat to the lake today. Ran the boat for 1.5 hrs at all speeds - boat ran great - boat tied to dock for 45 mins. - ran down the lake for 15 mins..boat ran great. Boat sat for 3 to 4 hrs.. Could hardly get the motor to start after sitting for the 3 or 4 hrs. - couldn't seem to get it primed - when I did get it started it would cut off when you gave it trottle. It never ran good the rest of the day - it would hardly run at all.
Obviously the fuel pump isn't\wasn't the problem - waste of time and $$$$. This problem, what I think is a fuel problem has been going on since the first of April. The carb. fuel lines look good but I guess I can replace them also. I've checked and rechecked for cracks in vac and fuel lines...I've not found a bad line yet. Could be a crack in a plastic male nipple somewhere.
Any ideas would be greatly appreciated at this time...I'm at the end of my ideas. It runs good then it doesn't want to run at all. After the new fuel pump and after the first 1.5 hrs it seems to run worse than ever.
Ideas...?