As I've been working through my boat and outboard, I recently rebuilt my 3 carburetors using OEM rebuild kits. i.e. gaskets, new floats and float valves. There really isn't much with these carburetors to screw up. I unscrewed the jets out of the bowl and verified that they were clear of any obstructions. The outboard starts much better now that this has been done.
Last night I took the boat out and it wanted to fight me a bit starting, but it finally started and I let it warm up before going out and getting it up on plane. I ran around 4700 RPM as measured by the tach which is where it was running before I did the carburetor work. Later in the evening when I was going to run it a bit before coming back to the dock, I'd give it throttle and it would start to build RPMs and then it would lag and die. It certainly seems like it is starved for gas which would be indicative of stuck float valves or a poorly performing fuel pump. Unfortunately I was out alone; otherwise, I'd have had someone pump the fuel bulb to keep pressure into the fuel pump while throttling up to see how it behaves.
I will be doing that this weekend sometime. In the meantime, I'm looking at getting an inline fuel pressure gauge. What is the maximum fuel pressure that I would expect to be dealing with on this year of engine? I've found an acceptable inline gauge that goes up to 15 PSI. Would that work well?
I am leaning toward a rebuild of the duel pump as my next step in the process.
Last night I took the boat out and it wanted to fight me a bit starting, but it finally started and I let it warm up before going out and getting it up on plane. I ran around 4700 RPM as measured by the tach which is where it was running before I did the carburetor work. Later in the evening when I was going to run it a bit before coming back to the dock, I'd give it throttle and it would start to build RPMs and then it would lag and die. It certainly seems like it is starved for gas which would be indicative of stuck float valves or a poorly performing fuel pump. Unfortunately I was out alone; otherwise, I'd have had someone pump the fuel bulb to keep pressure into the fuel pump while throttling up to see how it behaves.
I will be doing that this weekend sometime. In the meantime, I'm looking at getting an inline fuel pressure gauge. What is the maximum fuel pressure that I would expect to be dealing with on this year of engine? I've found an acceptable inline gauge that goes up to 15 PSI. Would that work well?
I am leaning toward a rebuild of the duel pump as my next step in the process.
