route66_garage
Cadet
- Joined
- Jul 21, 2008
- Messages
- 11
I recently purchased a 1978 Evinrude 9.9 outboard and have it on a small 16' pontoon boat. It starts right up and runs out great. The problem: After a few minutes of running, at any speed, the motor stops running. If I try to start it without pumping the fuel primer ball, it will not restart. If I pump the primer ball, it starts right up again, runs great for a few minutes and stops again. The ball, after it stops feels soft again, but it pumps right up. It is obviously a fuel delivery related problem but here is what I have done so far. Put a new fuel pump on it. Rebuilt the carb. Tried three different fuel tanks, with new gas, vents open and closed. Tried three different fuel lines with new bulbs. Two 3/8" and a brand new 5/16" ( a real Evinrude hose and bulb ). Cut the new hose down so the hose was shorter. Brought the tank onboard so it was at a higher elevation. I know the fuel pump works with cylinder compression, but the motor runs great with a lot of power when running? The water pump works fine and the motor does not run hot. If I catch it before it actually dies, and pump the ball, it stays running so it can't be electrical. Thanks in advance for any help you guys can share with me. Dave