Re: moped lost power and died - now won't start and has low compression

Mike Boyd /
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Piston and cylinder show a classic "4 corner" seize pattern, indicating that the piston got too hot and swelled and grabbed inside the cylinder.

The brass bushing at the small end of the crank is damaged as well. What 2 stroke oil/premix ratio were you using?

If this were my engine I would replace the crank, seals, and bearings with one of these.

You can try to hone the cylinder reuse, and maybe sand the piston and replace the rings, but with stock cylinder it's probably cheaper and easier to find a good used replacement for both on the buy/sell forum or buy a newer cylinder kit.

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Subject Written By Posted
  moped lost power and died - now won't start and has low compressionTopic by: up shits creek up shits creek 07/10/19 12:21PM
  Re: moped lost power and died - now won't start and has low compressionRe: Dirty30 Dillon Dirty30 Dillon 07/10/19 12:36PM
  Re: moped lost power and died - now won't start and has low compressionRe: up shits creek up shits creek 07/10/19 12:46PM
  Re: moped lost power and died - now won't start and has low compressionRe: Dirty30 Dillon Dirty30 Dillon 07/10/19 04:53PM
  Re: moped lost power and died - now won't start and has low compressionRe: live ɘvil live ɘvil 07/10/19 05:14PM
  Re: moped lost power and died - now won't start and has low compressionRe: Mike Boyd Mike Boyd 07/10/19 01:18PM
  Re: moped lost power and died - now won't start and has low compressionRe: up shits creek up shits creek 07/10/19 01:21PM
  Re: moped lost power and died - now won't start and has low compressionRe: live ɘvil live ɘvil 07/10/19 04:35PM
  Re: moped lost power and died - now won't start and has low compressionRe: up shits creek up shits creek 07/10/19 04:50PM
  Re: moped lost power and died - now won't start and has low compressionRe: Saabsonettguy . Saabsonettguy . 07/10/19 05:17PM
  Re: moped lost power and died - now won't start and has low compressionRe: live ɘvil live ɘvil 07/10/19 05:25PM
  Re: moped lost power and died - now won't start and has low compressionRe: up shits creek up shits creek 07/10/19 06:29PM
  Re: moped lost power and died - now won't start and has low compressionRe: Den 23 Den 23 07/10/19 09:53PM
  Re: moped lost power and died - now won't start and has low compressionRe: Overpriced Parts Overpriced Parts 07/11/19 12:27PM
  Re: moped lost power and died - now won't start and has low compressionRe: up shits creek up shits creek 07/11/19 05:44PM
  Re: moped lost power and died - now won't start and has low compressionRe: Mike Boyd Mike Boyd 07/11/19 05:48PM
  Re: moped lost power and died - now won't start and has low compressionRe: up shits creek up shits creek 07/11/19 06:30PM

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