372 XP

[Rich Fife]

A buddy asked me If I would work over his buddies saw... I said sure... tell him to cover the parts I put into it and we will be good. When I picked up this saw, it was Filthy... and it had a resident, a BIG spider turned the Exhaust into a home...

 

[Rich Fife]

After the saw was sprayed and wiped down with WD40, I checked compression. It felt weak, but I figured there was enough to fire it. Wrong. After working out my shoulder, pulling the cord, I decided to dive into it. What I found, wasn't good. I've saved a lot of Husky cylinders... but Not this one.

 

[Rich Fife]

I had an unknown BB cylinder and a Hyw piston on the shelf that i was going to use for a GTG saw... I contacted the owner and sent him some pics of his piston and cylinder... he asked how much it would be to fix the saw... My response was "$450 with all OEM parts"... (cylinder, piston, unlimited coil, NGK plug, air-fliter, gasket, clutch drum and Kill-switch)... he told me to box it up and drop it off at our buddies place...
I mentioned that I have an AM cylinder/piston... but, it's a big bore... 77cc. He asked, how much? Told him I had $75 into the kit... all said and done $150 for everything and we're good.

I took the AM 'stock' numbers...
Exh 102*
X-fer 126*
BD 24*
Int 71*
SQ .040"

I took .040" from the base... and took the lazy/fast route and machined a .025" pop-up leaving the Squishband alone.

 

[Rich Fife]

I continued on... opened up and blended the lowers. I Widened and raised the EXH roof. I widened and lowered the floor of the INT.

My numbers ended up @

Exh 102*
X-fer 127*
BD 25*
Int 78*
SQ .025"

 

[Rich Fife]

I got it together... fired it and then realized I never removed the plastic stops/limiters on the 'H' & 'L'. Once I removed those I was able to do a quick tune.
Tomorrow I'll stick it into some wood and run a few tanks through it.

 

[PA Dan]

Nice work brother!

 

[Rich Fife]

Nice work brother!

Thanks man!

 

[timg]

Nice looking work and sounds good. Any issues or pointers on edge dressing the port to cylinder bore blending? The titanekel plating doesn't seem to like grinding. I assume with the bore coloring that is a Titanekel plated cylinder. Thx. for sharing Rich.

 

[Rich Fife]

Thanks. The plating is definitely super hard/brittle... I have fine carbide bits and I'm able to run them in ccw rotation... I try to keep heat build up to a minimum... just slow and steady... I create a spot where the bare aluminum is exposed and then I work it in the direction I need it to go.

 

[Rich Fife]

A quickie.