D
Dan Heading
Guest
"I have a Mercruiser 4.3 liter
"I have a Mercruiser 4.3 liter V6 (GM 4.3 Liter V6 engine block), that I did an engine swap on. The donor engine came from a pickup truck with throttle body injection, and as such, while most parts were interchangeable, the fuel pump was not. I purchased an electric fuel pump, and the boat runs perfect at WOT. I'm decent with mechanical things, but I could not find any information in my repair manual about what kind of fuel pressure my engine was supposed to have. The carburetor is of 2 barrel design, and is the original carburetor. When I start the boat, it seems ok, and will run at wide open, but when you decelerate the boat tends to stall at low RPM, and refuses to restart. I was told that I have a fuel pressure issue that can damage the carburetor. I was told to buy a Holley pressure regulator and set it between 5 and 7 PSI. Does this sound reasonable? Is 5 to 7 PSI too much or too little for my application? I know fuel injection systems require considerably more pressure in a lot of applications, but I've never put an electric pump on a carbureted engine before..
Thanks for the time and the info."
"I have a Mercruiser 4.3 liter V6 (GM 4.3 Liter V6 engine block), that I did an engine swap on. The donor engine came from a pickup truck with throttle body injection, and as such, while most parts were interchangeable, the fuel pump was not. I purchased an electric fuel pump, and the boat runs perfect at WOT. I'm decent with mechanical things, but I could not find any information in my repair manual about what kind of fuel pressure my engine was supposed to have. The carburetor is of 2 barrel design, and is the original carburetor. When I start the boat, it seems ok, and will run at wide open, but when you decelerate the boat tends to stall at low RPM, and refuses to restart. I was told that I have a fuel pressure issue that can damage the carburetor. I was told to buy a Holley pressure regulator and set it between 5 and 7 PSI. Does this sound reasonable? Is 5 to 7 PSI too much or too little for my application? I know fuel injection systems require considerably more pressure in a lot of applications, but I've never put an electric pump on a carbureted engine before..
Thanks for the time and the info."