Coolster 125 (110) wont run.
#1
Coolster 125 (110) wont run.
Coolster 3125r with a mislabeled 110cc engine. Newer top end rebuild.
ran great, then just stopped and wouldn't restart.
Timing was off by 1 tooth, so I adjusted that. Adjusted both valves to .005. Getting 125 psi compression. Good spark, but put in a new plug anyways.
Still won't run. It will so mn etimes fire and limp along for a few seconds, then backfire out the carb and quit.
Thought it might be a carb issue, so I slapped a new carb on it (even though the old one was only 6 months old).
still runs the same.
I'm out of ideas.
what's next?
ran great, then just stopped and wouldn't restart.
Timing was off by 1 tooth, so I adjusted that. Adjusted both valves to .005. Getting 125 psi compression. Good spark, but put in a new plug anyways.
Still won't run. It will so mn etimes fire and limp along for a few seconds, then backfire out the carb and quit.
Thought it might be a carb issue, so I slapped a new carb on it (even though the old one was only 6 months old).
still runs the same.
I'm out of ideas.
what's next?
#2
#4
Did the straw trick, the "T" is TDC, or close enough I cant tell it's off. Pulled the cover anyways, it's on tight. Don't have the right puller to get it off, but I can see the key in the slot on the flywheel, and it looks OK. Cant see the slot in the crank, though. Bummed- I was convinced that was the problem.
had a new CDI lying around, no change.
as far as carb- what are the odds of a new carb being messed up in the same way as the old one? I even tried putting a little gas in the plug hole, with no luck.
had a new CDI lying around, no change.
as far as carb- what are the odds of a new carb being messed up in the same way as the old one? I even tried putting a little gas in the plug hole, with no luck.
#6
Just an update- cleaned the old carb, even had another one lying around. Still nothing. Pulled the flywheel, looks fine.
here is where I make myself look stupid- decided to check the spark again to see if it seemed to spark at roughly the right time.
it sparks, barely, for a few revolutions, then just kinda peters out. Obviously, it's an ignition problem. Parts are cheap, so I ordered an upgraded cdi, coil, and stator for it.
I feel stupid, my initial thought was spark, so I pulled the plug, held it to the head, and hit the starter. Saw a spark, and immediately crossed it off the list.
here is where I make myself look stupid- decided to check the spark again to see if it seemed to spark at roughly the right time.
it sparks, barely, for a few revolutions, then just kinda peters out. Obviously, it's an ignition problem. Parts are cheap, so I ordered an upgraded cdi, coil, and stator for it.
I feel stupid, my initial thought was spark, so I pulled the plug, held it to the head, and hit the starter. Saw a spark, and immediately crossed it off the list.
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