scavengerpioe
New member
I have a 50 hp Nissan that is driving me crazy. I work on motors but don't claim to be an outboard mechanic. I know enough to be dangerous. The motor starts right up and I can idol around the lake all day with no problem but from about 1/2 throttle on it starts to fall apart. This is a list of the things I have done. change plugs, 3 new coils, new head gasket, compression check (125,120,125), fuel pump, new cd box, rebuilt all 3 carbs (all ports clean) can't get over 4000rpm new lower pitch prop, the pontoon has a built in gas tank so I stuck the gas line in a fresh tank of gas. I sprayed gas into the carbs while running on the lake at high rpm but it acted like it was flooding out, did not pick up speed. I pulled the plug wires off one at a time while we were moving and it did effect the the rpm's. I pulled the flywheel to make sure there were no loose connections. added clear gas lines to see flow. A lot of this I did because I don't have the tools to do it correctly and didn't want to tie it up in a shop all summer as most shops are packed this time of year. What should I do next?