Ms660 will not start, but fires a couple times...

[bikemike]

F**** 50 to 1 mix stihl ratio. 40 .1 at the leanest unless you have amsoil. Like I always say spark plugs are cheeper than engine parts

 

[Tree94]

After talking to my guys I'm pretty sure what Happened to this saw is they didn't mix the 2stroke oil in with the gasoline at the correct ratio....
I broke my foot the beginning of this month and out of desperation to continue bringing in income I allowed my father to foreman my truck and continue to do easy jobs that didn't involve climbing.
Apparantly he didn't do a good job supervising...

Sometimes life really likes to **** you

 

[Tree94]

Now it's got me thinking what damage has been done to my other saws and blowers...

 

[Tree94]

Update. Finally got the cylinder off. Can I put a new piston in and be good or do I need to buy both p & c ?

 

[Trx250r180]

Mastermind did a thread on cleaning cylinders a while back ,read it and clean the aluminum off the jug,and get a new piston

 

[HarleyT]

That cylinder should buff out fine, so start buffing... Before you buy parts...

You need to find out what burned it up to begin with, instead of just replacing the piston, or else it will just happen again.

 

[middleagemutant]

If it's rubber replace it

 

[Thommo]

Judging by the color of the spark plug i would say it was running very lean.