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Mike Dempsey

stihl 066 problem

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Although I dont post here often I have been a lurker for a couple of years.

I mainly use my big saw for milling and I managed to persuade my 15 year old son today to leave his beloved computer behind and come out logging. I an wanting to build a fence from DF and started on a log about 8' long by 2' dia.

I was half way down the first top plank when I heard a loud bang and the ignition lead was loose on the spark plug. I reattached it making sure it was tightly on and carried on milling. This bang happened again about another 12" down the plank with the ignition lead being loose again. Not sure of why this was happening or what caused it I gave up and thought I would post a question here. I dont want to damage the saw as they are expensive enough without bashing on and perhaps having an expensive repair job. Anyone have any ideas?





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i have a similar problem with the MS660. The spark plug vibrates loose from the cylinder and sometimes the HT lead will pop off the plug. Doesn't make a bang though.


Mine only does it with milling never solved the problem.

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