Author Topic: Stihl 066 660 MS660  (Read 2920 times)

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Offline Cut4fun .

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Re: Stihl 066 660 MS660
« Reply #30 on: April 29, 2023, 07:33:06 am »
Stihl MS660 MS251 in wont start. All I did was swap out mix. Put my fresh in and few pulls on each running.

The 660 fuel was so dark. The 251 had water in it. White flakes floating in both.

Check your mix cans etc and rinse them out from time to time. Putting new on top of old isnt helping folks.Whatever is in there is ruining your new mix.
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