Re: 1972 20hp johnson not running properly
Well I tried to make her run again tonight. It took me about an hour to get it to start. I rechecked some things: spark is good, and I think the fuel pump is good, it shoots fuel out about 3-4 inches, is that enough or dooes it need more pressure? I tore into the fuel pump last weekend and everything looked good as far as I could tell. I also replaced every inch of fuel line and put new hose clamps on everything. The needle valve is 1&1/2 turns out. It finally started when I had the throttle opened a little. I think I had it flooded at first, so I took the plugs out dried them, and also blew the cylinder out with compressed air. Anyway after it was running: it will not idle but will run if I keep the rpm's up. adjusting the needle valve does not seem to make a difference. I also put some grease around the shaft that controls the butterfly on the carb, didn't seem to make any difference. Prettymuch I am done monkeying with this thing, and I usually don't give up, but this has me so frustrated. I think I will wait for a few reply's and then it is going to a mechanic. So any more ideas would be helpful and appreciated.
Well I tried to make her run again tonight. It took me about an hour to get it to start. I rechecked some things: spark is good, and I think the fuel pump is good, it shoots fuel out about 3-4 inches, is that enough or dooes it need more pressure? I tore into the fuel pump last weekend and everything looked good as far as I could tell. I also replaced every inch of fuel line and put new hose clamps on everything. The needle valve is 1&1/2 turns out. It finally started when I had the throttle opened a little. I think I had it flooded at first, so I took the plugs out dried them, and also blew the cylinder out with compressed air. Anyway after it was running: it will not idle but will run if I keep the rpm's up. adjusting the needle valve does not seem to make a difference. I also put some grease around the shaft that controls the butterfly on the carb, didn't seem to make any difference. Prettymuch I am done monkeying with this thing, and I usually don't give up, but this has me so frustrated. I think I will wait for a few reply's and then it is going to a mechanic. So any more ideas would be helpful and appreciated.