Author Topic: Husqvarna 350  (Read 1767 times)

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Offline jmester

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Re: Husqvarna 350
« Reply #50 on: December 29, 2018, 11:47:56 pm »
Pics showing impulse passages. 1st pic 350. 2nd pic 346.


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Offline Cut4fun .

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Re: Husqvarna 350
« Reply #51 on: December 30, 2018, 08:40:27 am »
Never paid attention to that before. Thanks for sharing
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Offline jmester

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Re: Husqvarna 350
« Reply #52 on: December 30, 2018, 02:09:51 pm »
The funny thing is that I know I watched Mitch's video on the last one I built. But never remember cutting a groove in the riser for impulse. Maybe I did but i think I would remember something like that.
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Offline Cut4fun .

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Re: Husqvarna 350
« Reply #53 on: January 24, 2021, 07:46:44 am »
Saving info by Spike60  = Just for the record there are 2 different 350 top ends and only one of them had the habit of spitting the muffler bolts. Early 350's were 44mm bore and straight open port designs, and shared that top end with the 351. (Jonsered 2150 and 2149) That top end is fine and did not have the muffler bolt issue.

The later 350's were 45mm and had the capped transfer ports. The cylinder was shared with the 353, but had a dished piston on the 350 and flat top piston on the 353. (Jonsered 2150 and 2152). That top end had an allergic reaction to the muffler bolts and spit them out whether it was a plastic case or mag case saw. Problem was some kind of vibration that was at it's worse at the 12,500 RPM. Unless you stayed on top of the bolts, it is just a matter of time until they get loose.

Best rebuild option is to go with the 346XP top end which is the same price as the 350 kits. Think it's only $110 for an OEM kit, so there's not much savings going with an aftermarket kit, Only 2 slight alterations need to be made and it bolts right on. Take about .050 off the cylinder bolts as the flange of the 346 jug is a little thinner than the 350's. Then shave the "ribs" on the clutch side of the crankcase so they do not interfere with the transfer castings which stick out a little farther on the 346 cylinders.

Results in a real quick snappy saw. I've built several of them for my tree service customers who always loved the 346 and don't want to let it go. Was hesitant at first to put them in commercial use, but decent 346/2153 carcasses are hard to come by. They actually hold up fine and I don't see issues with the plastic case. Now some of the guys are finding decent 350's and bringing them in asking me to "give them the 346 treatment".

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