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Old 05-23-2009, 04:23 PM   #8
ApS
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Default A common 2-stroke starting problem: Old, fouled plugs

Quote:
Originally Posted by Winnipesaukee View Post
"...Plugs are black/covered in oil......Spraying either in the carb does nothing......"
The oil is probably dissipating the spark. You should be able to SEE the spark.

Quote:
Originally Posted by Winnipesaukee View Post
"...Definitely getting spark. Pulled one out, forgot to ground, and zapped myself... I'm getting close to pulling the carb and cleaning it..."
You gotta SEE the spark. With fuel flowing as you've got it now, begin working on a spark plug angle.

Quote:
Originally Posted by Mee-n-Mac View Post
"...Still if you looked and saw a spark at a plug .... ????
"Zapping" is not the same as seeing a spark.

Quote:
Originally Posted by Winnipesaukee View Post
"...when I snap the throttle to WOT, fuel comes out the jets like normal...the engine right now is "running" off fresh, new fuel.
Just as a matter of long practice, I wouldn't touch the throttle unless gasoline has been in the carb fully for a day or two. The carb contains flexible parts designed for full immersion in fuel. Those can dry out and later rip. If you're getting normal fuel flow, then you most likely have a spark problem. I think the problem will be solved with a set of new spark plugs: At this late juncture, even one new plug that fits will get the engine started.

If the engine is still reluctant to start, remove one old plug altogether and crank the engine. The lowered compression load will increase the cranking speed, improving the opportunities at which compression and spark can spin the engine by itself.
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