660 squish? ??

[cobey]

With no gasket it was a head banger.
With card stock setting at .013
Pretty much unstartable.
Will the .o20 steel gasket with sealer
Be enough? The card stock was .011
Or so. I have a thicker gasket but it is .040. The thing jerked the rope back so hard it hit me in the wee wee area and I laid on the ground a bit and considered squish on big saws in a new light. What you all think?

 

[Deets066]

With no gasket it was a head banger.
With card stock setting at .013
Pretty much unstartable.
Will the .o20 steel gasket with sealer
Be enough? The card stock was .011
Or so. I have a thicker gasket but it is .040. The thing jerked the rope back so hard it hit me in the wee wee area and I laid on the ground a bit and considered squish on big saws in a new light. What you all think?

I think it's more the timing, I've ran 066's at .014-.016 and start just fine.... until you advance the timing a bunch

 

[cobey]

Odd, the timing is stock with the key so far. I wonder if there is a tighter place in the combustion chamber I'm missing?
I have always checked the squish on the piston pin sides of the piston .
Maybe a bad coil? The recoil spring is already going to crap anyway.
I will probably just keep this
Turd instead of selling it, I have a feeling
I would end up with a comeback anyway

 

[MustangMike]

If it is a head banger w/o gasket, do not use less than the .020 stihl. Insert that, then check the squish. You want about .020, but can get away with a bit less.

I would also highly recommend a OEM piston bearing. I tried to use the one supplied, and after about 10 tanks it gave the piston enough play to start touching the squish band (felt like the saw had no AV, and luckily I ripped it down).

 

[Deets066]

Check the gap on the coil to flywheel

 

[Deets066]

Should be no more than .014 and no less than .010

 

[cobey]

If it is a head banger w/o gasket, do not use less than the .020 stihl. Insert that, then check the squish. You want about .020, but can get away with a bit less.

I would also highly recommend a OEM piston bearing. I tried to use the one supplied, and after about 10 tanks it gave the piston enough play to start touching the squish band (felt like the saw had no AV, and luckily I ripped it down).

I have one, I'm gonna put it in
When I fix the squish.
It looks like it's pretty easy to pull the jug on this saw

 

[cobey]

Should be no more than .014 and no less than .010

I will dig out a feeler gauge, I used a business card

 

[Deets066]

I will dig out a feeler gauge, I used a business card

Business card is usually really close

 

[cobey]

Should be no more than .014 and no less than .010

Does it effectively change the timing,
Or just make the spark weaker or touch the flywheel if it's wrong?

 

[huskihl]

Does it effectively change the timing,
Or just make the spark weaker or touch the flywheel if it's wrong?

Bigger gap retards the timing slightly. Tighter advances it, but I believe it's only a very small amount

 

[cobey]

Bigger gap retards the timing slightly. Tighter advances it, but I believe it's only a very small amount

That's what my brain was thinking

 

[Wonkydonkey]

I'd also look at the fuel amount the carb is delivering, is the plug a rich colour
As I had a 036 that used to rip the easy start handle out of my poor little fingers.

It turned out to be the meatering leaver set to high. Since it been set ive not had a problem.

 

[Moparmyway]

With no gasket it was a head banger.
With card stock setting at .013
Pretty much unstartable.
Will the .o20 steel gasket with sealer
Be enough? The card stock was .011
Or so. I have a thicker gasket but it is .040. The thing jerked the rope back so hard it hit me in the wee wee area and I laid on the ground a bit and considered squish on big saws in a new light. What you all think?

Your.020 gasket will be perfect. You shouldn’t need any sealer

 

[cobey]

Your.020 gasket will be perfect. You shouldn’t need any sealer

It's a crappy looking metal one, it will work?

 

[Redfin]

If it still has the factory contour, yes.

 

[hseII]

Your.020 gasket will be perfect. You shouldn’t need any sealer

Unless the Cases are uneven.

 

[Redfin]

Unless the Cases are uneven.

What a skeptic.

 

[hseII]

What a skeptic.

That was part of the issue with this JMS 066 That Moobisicles fixed.

You Could Say It’s Still Fresh Nephew.

 

[Redfin]

That was part of the issue with this JMS 066 That Moobisicles fixed.

You Could Say It’s Still Fresh Nephew.

I know Man, the pain will ease.