Stihl 661 , black crank

[singinwoodwackr]

I ended up putting a new meteor piston in . Honed the cylinder and it's back in action.

Turns out the spring in the spark plug boot was bad causing the saw not to rev up . New spring and it's as good as new

Ha, I fixed one of those a couple weeks back. Guy said it wouldn’t keep running. Broken spring, 661

 

[singinwoodwackr]

The EPA exhaust restrictions will contribute to heat retention. My 661 with porting and empty can didn't respond well til it was broke in and the little round hole became a picture window as large as possible and the screen replaced. The brain that adjusts the carb adapts very well (<; to that in my experience. It will out perform a stock 881 I believe

In my experience they do out perform any of the stock 8 series. And 10# lighter and his with 42”, .404, 7t, 52AJ on both. But then my 066 does the same

 

[Gord404]

thanks- will take a good look at that tomorrow

 

[Jza]

Ha, I fixed one of those a couple weeks back. Guy said it wouldn’t keep running. Broken spring, 661

$5 spring too! I'm sure if the stihl shop had it there way they would of sold me a new module lol

 

[Tobystihl]

If a 661 has spark issues, nine times out of ten its the wiring loom at fault.

 

[Gord404]

ya it's strong enough for a cheap spark tester but not a new plug- think i have some wires on wrong- layed up with a sore back but will get at it again in a couple of days- put a new meteor piston in this one to- deglazed that perfect cyliner I took off but thought I had better start of with a new piston as well.