This motor has me puzzled. My Dad bought a Jon Boat with this engine and I've been trying to help him rebuild it. Replaced the worn pistion rings, sealed the case, got it running decently at idle. When we tore it down, it was obvious that one of the coils had been replaced, points and condensers had been done. We replaced the wires, added new plugs, changed the fuel filter. Now the dilima:
In a tank, with no load on the motor, it seems to run fine. It ALWAYS starts. Very predictable. Choke it, and pull till it sounds like it'll start. Un-choke it and it'll start on the 2nd pull, just like clock-work. Let it warm up, and drop it in gear. In a tank it will run all day. Accellerate no problem. Foward or in Reverse.
Take it to the lake and it's a different story. Starts and idles fine, but when you drop it into gear, if it has a LOAD on it, it will come off idle, but it has NO POWER and if you try and accellerate, it's like there isn't anything there, and then it will start mis-firing. It only does it under load.
My I thought the obvious problem was a weak coil (since 1 had been replaced, and the other was the original). Purchased a new one and while it does idle better, it didn't solve the accelleration issue. It's not an issue of the handle not turning or opening up the carb, and "I" don't believe it's a fuel issue, or it would do the same thing when it wasn't under a load wouldn't it?
Anyone have any ideas?
In a tank, with no load on the motor, it seems to run fine. It ALWAYS starts. Very predictable. Choke it, and pull till it sounds like it'll start. Un-choke it and it'll start on the 2nd pull, just like clock-work. Let it warm up, and drop it in gear. In a tank it will run all day. Accellerate no problem. Foward or in Reverse.
Take it to the lake and it's a different story. Starts and idles fine, but when you drop it into gear, if it has a LOAD on it, it will come off idle, but it has NO POWER and if you try and accellerate, it's like there isn't anything there, and then it will start mis-firing. It only does it under load.
My I thought the obvious problem was a weak coil (since 1 had been replaced, and the other was the original). Purchased a new one and while it does idle better, it didn't solve the accelleration issue. It's not an issue of the handle not turning or opening up the carb, and "I" don't believe it's a fuel issue, or it would do the same thing when it wasn't under a load wouldn't it?
Anyone have any ideas?
