dimanche 30 avril 2017

Stihl leaf blower BG 55-Z, compression 75

I have a Stihl leaf blower, model BG 55- Z. It was running fine, ran out of gas, refilled it, would not start. Replaced plug (even though plug looked good). Tested spark, good. Tried a small squirt of starter fluid, nothing. Rebuilt carb, noticed nothing damaged, and replaced fuel filter. Still no start. Removed muffler, soaked in desolvant over night even though it looked OK. Looked at piston through exhaust port, piston and rings look very good. Reinstall muffler, still no start.
Compression test 75. I understand it should be between 90 and 110.

Would a low compression test of 75 cause the engine to not fire at all?
Is it likely that the engine would go from running well one minute to not starting at all the next as a result of some compression issue?


Stihl leaf blower BG 55-Z, compression 75

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