Hello,
if anyone remembers me; welcome back to me 15 hp evinrude. I've completed a few stints with my rebuilt engine and it runs good save for one issue, it likes to stall. So when i start it I turn the gas all the way up (as far as it will go in neutral), open the choke and pull once or twice which starts the engine just fine, push the choke back in and it'll idle but even when I leave the throttle at its maximum position it starts to reduce rpm and eventually stutters to a halt. It starts very easy after that, first pull but it always needs that max throttle position and eventually I'll get it to keep idling but then when I put it in gear and attempt to go full throttle it stalls again. Worth mentioning it wont really idle forever, it'll die eventually. Once all these is done the engine runs like a champ, seems to have plenty of power and when the boat is up on plane and the engines gets to chug away it does so, for how ever long I want it to. Anybody have any idea what's up with that?
Here are the details about the engine;
Fuel system completely rebuilt, new hoses, rebuilt fuel pump, carb cleaned three times, last time with ultrasonic, carb adjustments have been made to spec.
The compression on the engine at room temp without an exhaust on it in the dry was about 110 psi on both cylinders.
The electrical system has been checked, everything checks out, including coils. It has new plugs and sparkplug wires.
The reedvalves have been inspected and adjusted, looked really good and the whole engine has new crank case seals (all seals have been replaced with new ones)
Pistons were slightly scored (assuming it had overheated at some point in its life) but the rings were undamaged and didn't seem stuck, the cylinder walls looked fantastic (low hour engine)
The fuel tank has the vent screw open, the bulb hardens nicely when squeezed and softens a bit when the engine has run for a while.
if anyone remembers me; welcome back to me 15 hp evinrude. I've completed a few stints with my rebuilt engine and it runs good save for one issue, it likes to stall. So when i start it I turn the gas all the way up (as far as it will go in neutral), open the choke and pull once or twice which starts the engine just fine, push the choke back in and it'll idle but even when I leave the throttle at its maximum position it starts to reduce rpm and eventually stutters to a halt. It starts very easy after that, first pull but it always needs that max throttle position and eventually I'll get it to keep idling but then when I put it in gear and attempt to go full throttle it stalls again. Worth mentioning it wont really idle forever, it'll die eventually. Once all these is done the engine runs like a champ, seems to have plenty of power and when the boat is up on plane and the engines gets to chug away it does so, for how ever long I want it to. Anybody have any idea what's up with that?
Here are the details about the engine;
Fuel system completely rebuilt, new hoses, rebuilt fuel pump, carb cleaned three times, last time with ultrasonic, carb adjustments have been made to spec.
The compression on the engine at room temp without an exhaust on it in the dry was about 110 psi on both cylinders.
The electrical system has been checked, everything checks out, including coils. It has new plugs and sparkplug wires.
The reedvalves have been inspected and adjusted, looked really good and the whole engine has new crank case seals (all seals have been replaced with new ones)
Pistons were slightly scored (assuming it had overheated at some point in its life) but the rings were undamaged and didn't seem stuck, the cylinder walls looked fantastic (low hour engine)
The fuel tank has the vent screw open, the bulb hardens nicely when squeezed and softens a bit when the engine has run for a while.