I was over at my friends house the other night skinning a couple deer, and I noticed his Husky 350 was partly disassembled on the bench. I took it home to fix it up for him. Oddly it was wearing an 18” 3/8” bar & chain. The clutch had the spur sprocket, so I suspected it was .325”. Turns out I was right. Anyway, I took the crank out and re-sealed the bottom end….the bottom of the riser was warped badly, so I trued that up. The saw also had a crappy 44mm open transfer AM jug on it. I swapped that top end for a decent 45mm OEM jug I had and a flat-top AM piston. I went ahead and did a muff mod (with a brace) and a healthy timing advance as well. Hopefully it serves him well for many more years.
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After making these two cuts, I had to open the high jet another 1/8 turn to get it to 4-stroke after warming up.
Husqvarna 350 repaired with muffler mod & timing advance. 3/8” chain