papa porky
Recruit
- Joined
- Aug 12, 2012
- Messages
- 1
My 1989 Mariner Magnum 150 will not go past idle speed while in the water. The motor starts and runs fine, but rpms will not go past idle with a load on the prop. I can rev the motor while in neutral, or if running the motor out of the water. I rebuilt the fuel pump and replaced the fuel hoses and fuel filter. It ran fine previously. One day while cruising 30-35 mph I went to pick up some passengers, after that it acted like it was bogging down. It would eventually speed up the next couple of times I took it outbut not more than 30mph. It now only runs to about 15-20mph.