STIHL 028 Compression spec - spoke to Stihl

[abl1111]

Jockey,

Is that a 44mm ?

If so, can you measure the distance from the centerline of the pin to the top of the dome ?

I did this by placing the piston 'dome-side' down on a flat surface and measuring from the table's surface to the CL of the connecting rod pin...

Here's a picture of the piston from the side:

 

[jockeydeuce]

Jockey,

Is that a 44mm ?

If so, can you measure the distance from the centerline of the pin to the top of the dome ?

I did this by placing the piston 'dome-side' down on a flat surface and measuring from the table's surface to the CL of the connecting rod pin...

I'm sure your piston is correct now seeing that other picture, but........


I just measured mine (44mm piston), but measured from the very edge of the top of the piston to the center line of the pin is very close to 21mm. Sorry I couldn't get a good measurement to the tip of the dome like you did, but it should be about 21mm from the very edge to the CL of the pin.

 

[lone wolf]

I wonder if he called stihl or emailed and asked a tech what the deal with pistons for that saw is how many applications are their and would the serial number tell what piston exactly should be in there.

 

[abl1111]

Jockey - yeah mine measures about 20-20.5mm.

I talked to the guy who gave me the saw today - just to get some add'l info. He said that he would use it for 20 minutes and than it would just slowly lose power, and stall and be impossible to restart until it cooled again. It didn't seize or anything like that.

I think I'm gonna put it together and use a bit. My gut says that the P&C are just plumb-worn out from a healthy life... I know a new P&C would bring the saw back to life...

 

[abl1111]

Anway to test the roundness of a cylinder

 

[mtngun]

Anway to test the roundness of a cylinder

Bore mic and a fair amount of experience using it.

Your cylinder looks fine.

 

[powerking]

Bump...any word on what the final problem was with your compression issue?

 

[lone wolf]

Jockey Jockey - My piston looks exactly like yours. Even the "2" I can see, and thru to the inside of the other skirt, mine has 44L and a 24+

I see yours has something written in there too.

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A few pix of my cylinder and piston:

Thx for sticking in there !

Am I the only one that sees the plating worn off that Cyl?