Stihl 064,What do you see?

[jmssaws]

From the looks of the crown I'm saying squish was tight and or compression was very high

 

[Definitive Dave]

Is the 281 282 piston domed and 2 ring?
Mystery ks cylinder with mahle piston

 

[lwhaples]

Are you sure it's a 064?

Looks like my other 064.How do I tell? Aluminum flywheel with a 8mm nut.

 

[jmssaws]

Looks like my other 064.How do I tell? Aluminum flywheel with a 8mm nut.

Pic of the flywheel and top cover or recoil?
Oil pump have a rubber hose?

 

[jmssaws]

Is the 281 282 piston domed and 2 ring?
Mystery ks cylinder with mahle piston

No
That's a 056 piston and a ks red light cylinder

 

[jmssaws]

056 piston

 

[jmssaws]

066 on left
064 on right

 

[jmssaws]

066 on right

 

[lwhaples]

 

[jmssaws]

I'd swear that was a 52mm cylinder but I guess I'd be wrong.
Cylinder bolts still m5?

 

[jmssaws]

A 52mm ks doesn't look like that so that's why I thought it was a mahle

I'm dying to know what squish is

 

[jacob j.]

There was guy over at the Forestry forum years ago that built up an 066 with an 056 Super piston for milling, and he swore by it. I doubt that's one of his saws but probably somebody had the same idea.

 

[Onan18]

Is the 281 282 piston domed and 2 ring?
Mystery ks cylinder with mahle piston

Every 288 I ever had apart had a single ring piston. I guess it is possible that there may have been an early thin ring 288 piston but I have never seen one. Now a thin ring 181 (52mm) that I have seen.

 

[jmssaws]

Maybe not in oem but several am 288 piston have 2 rings.

No dome though

 

[lwhaples]

Bolts are 5mm. With a flat top and no gasket,I get .013.With dome piston and no gasket and .021 solider it never touched.The saw had a .020 gasket on it when torn down.

 

[MustangMike]

Is it possible it has a 056 piston that was turned down so they could get the dome?

 

[jmssaws]

Is it possible it has a 056 piston that was turned down so they could get the dome?

A 056 is a dome piston.

 

[MustangMike]

Exactly, I'm saying maybe they turned down the diameter to use a domed piston. (Sorry if my post was not clear).

 

[jmssaws]

Exactly, I'm saying maybe they turned down the diameter to use a domed piston. (Sorry if my post was not clear).

There is 52mm 54mm and 56mm 056 pistons

 

[a. palmer jr.]

Is that a domed Mahle piston?
Circlips dont look like OEM Stihl either for that model.
Ring looks like 1.5 mm instead of 1.2mm.
Is that an unusual bevel to just one large corner of the intake, or is it worn oddly there or just a trick of the light?
I am guessing modified saw probably Husqvarna piston, maybe 066 cylinder with 288 piston.
The unusual wear at the inside of the pin boss makes me think they used an 088 Stihl piston pin bearing without spacers instead of the 288 OEM bearing.

I wish all saws would use that type of wrist pin circlip...