I am just about to give up on this motor. It runs great at idle but will not run at WOT without pushing in the choke. It runs like a scalded dog when I do that. Let me give some history.
Last summer I was cruising out at the lake at about 3/4 throttle when we lost rpms and went down to basically an idle. After some extensive checking out at the sand bar I found that one side of the motor had no fire. I figured I lost a power pack. Easy enough. So we got towed in and I did the old swap the pack trick at home but the problem stayed the same. Same side was dead. So I figured the stator was bad so I ohmed it. Ohmed good. The timer ohmed good as well. All the coils checked good too. What the heck was going on? So I just parked it for the fall and winter. I started looking at it in April to get it going for summer. Changed the pins in the connectors, no help. Bought a new power pack, no help. Found a guy with a 86 Evenrude 85HP with a burnt piston that wanted to get rid of it, so he gave it to me. So I robbed all the ignition parts on it. Put the stator and the timer on my motor. BINGO. It runs great on the hose in the driveway. Runs great at idle in the water too just not at WOT unless I push in the choke. So I rebuilt the carbs and put in new kits. TWICE. No help. Re-ran all fuel lines with new hose and clamps, no help. Pulled the fuel pump off and apart and found no obvious holes or cuts in the diaphram. Checked it on a portable fuel tank I know works well on my dads boat, no help. The bulb on the tanks will not stay hard while its running. In fact the filter in the cowling area never fills up. It appears to be nearly empty while running.
Do you guys think this is a fuel pump problem? I'm just baffled.
Last summer I was cruising out at the lake at about 3/4 throttle when we lost rpms and went down to basically an idle. After some extensive checking out at the sand bar I found that one side of the motor had no fire. I figured I lost a power pack. Easy enough. So we got towed in and I did the old swap the pack trick at home but the problem stayed the same. Same side was dead. So I figured the stator was bad so I ohmed it. Ohmed good. The timer ohmed good as well. All the coils checked good too. What the heck was going on? So I just parked it for the fall and winter. I started looking at it in April to get it going for summer. Changed the pins in the connectors, no help. Bought a new power pack, no help. Found a guy with a 86 Evenrude 85HP with a burnt piston that wanted to get rid of it, so he gave it to me. So I robbed all the ignition parts on it. Put the stator and the timer on my motor. BINGO. It runs great on the hose in the driveway. Runs great at idle in the water too just not at WOT unless I push in the choke. So I rebuilt the carbs and put in new kits. TWICE. No help. Re-ran all fuel lines with new hose and clamps, no help. Pulled the fuel pump off and apart and found no obvious holes or cuts in the diaphram. Checked it on a portable fuel tank I know works well on my dads boat, no help. The bulb on the tanks will not stay hard while its running. In fact the filter in the cowling area never fills up. It appears to be nearly empty while running.
Do you guys think this is a fuel pump problem? I'm just baffled.
Last edited:
