steam_mill
Chief Petty Officer
- Joined
- Jan 16, 2002
- Messages
- 413
I have a Mercury 75, 7.5 hp from the late seventies(1977?). Canadian serial number is 7106267.<br /><br />It runs well. Idles smoothly and WOT is smoth also.<br /><br />It is difficult to start. Once it starts, it will restart easily. After about <br />30 minutes of rest, it is difficult to start again.<br /><br />Here is what I've tried:<br /><br />1. Checked primer bulb. It pumps gas and gets hard. Pumped while underway. No difference.<br /><br />2. Checked fuel filter. It was clean but I cleaned it anyway.<br /><br />3. Checked plugs. They are new and were clean. Cleaned them and regapped them.<br /><br />4. Treated with Deep Creep. Idles even better now.<br /><br />5. When running, checked for spark. Will run with either plug wire disconnected. Nice blue flame on both plugs.<br /><br />6. No spark when it doesn't start. If I pull the starter over and over and over, it will eventually come to life and run great.<br /><br />It seems by conincidence but if I pull the motor up and drop it, it sometimes will restart.<br /><br />I'm completely stumped. If it were the powerpack, I'm thinking it will either work or not. I can run the motor for 30 minutes and it will start right back up. Wait awhile and it will not start.<br /><br />I'm thinking stator? But the spark is so good when it runs, that I'm not sure about that either.<br /><br />Fishing season is here. I need this to work.....<br /><br />Any ideas?<br /><br />Tx.<br /><br />Joe