044 Rod at piston width

[dls]

Overhauling all 5 of my 044's. First time for this issue. I thought the 10mm and 12mm were pin diameters. Newer were 12. Today I put a new crankshaft in 1 that had a loose rod at the crank and the piston would not fit on the new rod. I finally dug out an aftermarket piston and it would slip over. Are there different connecting rod widths? 20 years of tearing these things down and putting them together and I never saw this before.

 

[pioneerguy600]

The 10 mm pin rods are narrower at the piston pin end, I have never bothered recording the widths but have built a fair number of both 10mm and 12mm pin diameter saws.

 

[pioneerguy600]

I do have some cranks out of saws so now I must take and record measurements, have so many measurements , might as well add these .

 

[Chainsaw Jim]

10mm 044...



12mm 044..

 

[pioneerguy600]

Thanks Jim, saves me the effort of digging out the cranks and measuring them.

 

[dls]

I tried several pistons. Some would not fit, some tight, 2 seemed about right. I guess at some point quality control was downsized or eliminated. I didn't measure any. Too cold to go out and get my caliper. Interesting to see what you found.

 

[Chainsaw Jim]

Thanks Jim, saves me the effort of digging out the cranks and measuring them.

No problem. I already had them sitting next to my bench from doing measurements and comparisons so it was too convenient not to.

I was wondering if an 064 crank would fit in the 044 case, lol.

 

[pioneerguy600]

No problem. I already had them sitting next to my bench from doing measurements and comparisons so it was too convenient not to.

I was wondering if an 064 crank would fit in the 044 case, lol.

That would be stretching it a bit....LOL