I have a intermittant problem on a 1995 150 HP ocean runner that is driving me mad. The motor is lossing the top end RPM. Compression is 100 PSI +/-5 on all six. New plugs, rebuilt all six carbs. One of which had a problem of a missing bowl seal (BB like plug) and was leaking fuel. New bowl and new fuel line pump bulb. Old one was cracked after one season.
Launched boat and it ran normally at first, but at WOT it wouldn't get over 4200 RPM. One day later the boat was run approx 8 miles, WOT 5500 RPMs.
Boat sat for 5 days and now I can't get 2500 RPMs at WOT. Runs rough, it feels like a miss. No alarms of any kind. Could someone please point me in a direction to troubleshoot this? The pump in the fuel line never gets completely firm no matter how much it is pumped. But no fuel leaks from the carbs. I'm stumped.
Launched boat and it ran normally at first, but at WOT it wouldn't get over 4200 RPM. One day later the boat was run approx 8 miles, WOT 5500 RPMs.
Boat sat for 5 days and now I can't get 2500 RPMs at WOT. Runs rough, it feels like a miss. No alarms of any kind. Could someone please point me in a direction to troubleshoot this? The pump in the fuel line never gets completely firm no matter how much it is pumped. But no fuel leaks from the carbs. I'm stumped.