Hi Guys,
I have posted about this a few times and I?m almost at my wits end with this motor. Below you can see everything I?ve done with the motor, the carb work and gaskets being most recent. Dropped the boat in the water this past weekend and had no success, the motor still stalls out and will not run at high RPMs at all while under load. I took the upper cowling off to find gas in my engine compartment, took the air silencer off (#52) and revved the boat up in neutral to see what was going on. All four carbs are spitting out fuel when revved up to the point where it filled the bottom of the silencer with fuel. The top left carb seemed to be the worst and was firing smoke out of the mouth of the carb when revved up. This leads me to believe the motor is getting way too much fuel. Ran the motor with an external tank as well as off the internal set up, no difference.
I have contacted the distributor we got the VRO fuel pump from, they are not able to replace it. At $450 I have tried to rule out everything before pulling the trigger on that VRO replacement. Does anyone have any other suggestions? I understand there are ways of testing the pump using a clear hose filled with oil etc. but I have not gone through that yet as it appears the motor is getting too much fuel. Additionally I know that when the pulse limiter line is removed and the ball is pumped the VRO does not release fuel which is a good thing. When I had the intake apart there was fuel sitting in the crankcase with the pistons and the exhaust leaks out the excess raw fuel as it sits on the trailer at the house.
At this point I am stuck between bringing it to the mechanic or purchasing the new pump as that?s all I see left that could possibly be causing the issue. Any thoughts or ideas are appreciated. Thank you!
Replaced so far:
? Intake manifold gaskets (man. To head and man. To carbs)
? All carburetor gaskets (carb repair kits on all four)
? Jets, floats, seals, seats
? Essentially all gaskets in the fuel intake and carbs.
? New fuel line
? New fuel ball
? New racor fuel filter/water separator
? New fuel line fittings
? New fuel tank pickup
? New spark plugs
? Tested for spark and compression
? Fuel pump replaced 9 months ago, just got my hands on the boat from my dad, boat did not run prior to installing the new pump and has not run property with the new pump.
I have posted about this a few times and I?m almost at my wits end with this motor. Below you can see everything I?ve done with the motor, the carb work and gaskets being most recent. Dropped the boat in the water this past weekend and had no success, the motor still stalls out and will not run at high RPMs at all while under load. I took the upper cowling off to find gas in my engine compartment, took the air silencer off (#52) and revved the boat up in neutral to see what was going on. All four carbs are spitting out fuel when revved up to the point where it filled the bottom of the silencer with fuel. The top left carb seemed to be the worst and was firing smoke out of the mouth of the carb when revved up. This leads me to believe the motor is getting way too much fuel. Ran the motor with an external tank as well as off the internal set up, no difference.
I have contacted the distributor we got the VRO fuel pump from, they are not able to replace it. At $450 I have tried to rule out everything before pulling the trigger on that VRO replacement. Does anyone have any other suggestions? I understand there are ways of testing the pump using a clear hose filled with oil etc. but I have not gone through that yet as it appears the motor is getting too much fuel. Additionally I know that when the pulse limiter line is removed and the ball is pumped the VRO does not release fuel which is a good thing. When I had the intake apart there was fuel sitting in the crankcase with the pistons and the exhaust leaks out the excess raw fuel as it sits on the trailer at the house.
At this point I am stuck between bringing it to the mechanic or purchasing the new pump as that?s all I see left that could possibly be causing the issue. Any thoughts or ideas are appreciated. Thank you!
Replaced so far:
? Intake manifold gaskets (man. To head and man. To carbs)
? All carburetor gaskets (carb repair kits on all four)
? Jets, floats, seals, seats
? Essentially all gaskets in the fuel intake and carbs.
? New fuel line
? New fuel ball
? New racor fuel filter/water separator
? New fuel line fittings
? New fuel tank pickup
? New spark plugs
? Tested for spark and compression
? Fuel pump replaced 9 months ago, just got my hands on the boat from my dad, boat did not run prior to installing the new pump and has not run property with the new pump.
