Author Topic: Stihl 025 pulled fine with spark plug removed but impossible with it installed  (Read 971 times)

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Offline riverguy

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Hi All,

    Surely someone else has seen this ? This is 21 years old and doesn't owe me a penny but I'd like to play with it and get it going again. I have soaked the combustion chamber with Sea Foam but with no improvement. I see only a slight darkening on top of the piston while looking through the spark plug hole. Perhaps there is a carbon build up at the top of the chamber that I can't see ? Might this up the compression making the pulling impossible with the spark plug in ? Anybody have thoughts on this ?

Thanks all,
FPJ


Did you ever find the solution to this thing?  I just posted the same question but with an 031, also 20 years old.  Some replies said it might be the starter, but yours, like mine, seems to turn over fine with the sparkplug removed.  Seems that would indicate the starter is OK.  I'm a veteran engine builder but know nothing about two-strokes.  This is a mystery!

Thanks,

riverguy

 

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