You guys have helped me so much, and I appreciate it. But this motor keeps giving me problems, so please, a little more help. Once again I have a 1975 75HP Evinrude Hustler.
I had a little trouble with the timing, but I think I got that fixed. the flywheel had sheered the key, so I fixed that, and retimed it according to manual specifications. I took it out to the lake to run it, and it ran fine for two runs. Now what its doing is surging at Wide Open Throttle. So I thought I might be losing a piston again because I replaced the coils and WAS NOT crazy about how the spark plug wire taps into the coil. In fact, during my trip they came apart....TWICE!!! So I might be looking for a better option on these down the road.
I was messing with the spark advance in open water, even though I dialed it in at home, and all of a sudden at high throttle, the motor dies, and then would not start. I had the same thing happen to me on shore earlier, and I thought it was just a low battery. That time, after charging it it seemed to work fine. But this time I tried to start it 2 or 3 times, then went back to the gas ball....empty. Pumped it up firm, tried to start it, ball is flat again. So I troll back to shore where after a few tries I get it to start, run a few seconds, and then die. It does this three times, then finally starts and stays running. I go back to the ball on the motor and when I pump it then engine picks up.
So, waddya think? Fuel pump? This would explain the surging at full throttle and the random dying and flat ball. I just rebuilt it three weeks ago, but since then it has fuel locked, HARD, once. Could I have messed up the diaphragm, or can you simply not rebuild these worth a damn and when its time do you just need to replace the fuel pump?
I had a little trouble with the timing, but I think I got that fixed. the flywheel had sheered the key, so I fixed that, and retimed it according to manual specifications. I took it out to the lake to run it, and it ran fine for two runs. Now what its doing is surging at Wide Open Throttle. So I thought I might be losing a piston again because I replaced the coils and WAS NOT crazy about how the spark plug wire taps into the coil. In fact, during my trip they came apart....TWICE!!! So I might be looking for a better option on these down the road.
I was messing with the spark advance in open water, even though I dialed it in at home, and all of a sudden at high throttle, the motor dies, and then would not start. I had the same thing happen to me on shore earlier, and I thought it was just a low battery. That time, after charging it it seemed to work fine. But this time I tried to start it 2 or 3 times, then went back to the gas ball....empty. Pumped it up firm, tried to start it, ball is flat again. So I troll back to shore where after a few tries I get it to start, run a few seconds, and then die. It does this three times, then finally starts and stays running. I go back to the ball on the motor and when I pump it then engine picks up.
So, waddya think? Fuel pump? This would explain the surging at full throttle and the random dying and flat ball. I just rebuilt it three weeks ago, but since then it has fuel locked, HARD, once. Could I have messed up the diaphragm, or can you simply not rebuild these worth a damn and when its time do you just need to replace the fuel pump?
