bigboat606
Seaman
- Joined
- Sep 6, 2009
- Messages
- 52
A week ago I ran my 1987 200 HP Evinrude motor on the flusher. It ran fine for a while then it started running rough and the idle began slowing. I pumped the fuel line primer 'bulb' and the idle picked up SOME but I could not pump it enough to keep the engine going. By-the-way the fuel pump was replaced about a year ago and has about 15-20 hours run time on it. Today I finally got around to looking at the engine. First I started hand pumping the primer bulb with the engine off. It would not get 'hard' no matter how much I pumped. It did get harder but not like a rock because it was moving fuel. I could hear fuel hissing or moving in the area of the carbs with each pump of the primer bulb. I took off the cover to the carburetors so I could view them as I pumped the primer bulb. I saw no fuel coming out of any of the carburetors. I next removed the vacuum hose from the fuel pump and checked for leaking fuel as I pumped the primer bulb. No fuel at the vacuum of the fuel pump. Finally I tried to start the engine. It ran smooth except it idled much too fast. (Usually when I first start the engine it runs too fast and I just choke it until the engine speed slows down, then I stop choking and I'm good for the duration. I only do this when I run on the flusher.) When I tried to choke the engine this time it had no effect. The engine kept a high idle no matter how long I keep the choke engaged. Finally the engine speed increased to around 1500 rpm (after 3 or 4 minutes) and I shut it down. After all this background my question is: where is my fuel going when I pump the primer bulb? I don't smell an unusual amount of fuel and I don't see it leaking anywhere, but do hear fuel moving in the area of the carbs. And I pumped the primer bulb A LOT. Also what is making the engine race at idle?
