WANTED Early Husqvarna 357xp Piston

[CJ Brown]

As the title says, I'm looking for a piston for an early 357xp. They used a narrower connecting rod/bearing in the early saws so the distance between the piston bosses is narrower (approx. 14mm). The later saws used a piston with approx. 15.5mm between the bosses. Anybody got anything before I go looking for a 257 piston?

Thanks,
Chris

 

[Mastermind]

As the title says, I'm looking for a piston for an early 357xp. They used a narrower connecting rod/bearing in the early saws so the distance between the piston bosses is narrower (approx. 14mm). The later saws used a piston with approx. 15.5mm between the bosses. Anybody got anything before I go looking for a 257 piston?

Thanks,
Chris

I had forgotten about this issue Chris. I have a 254 piston.....but nothing in 46mm.

 

[CJ Brown]

Hi Randy. Yeah the early 357xps are a bit of a problem to rebuild. The guy I got the saw from straight gassed it and the dealer told him he couldn't get parts. So the owner bought a china kit (with the wrong piston) and installed it himself. That didn't go so well, so he sold the saw to me for parts. I have a cylinder here from another carcass but no piston.

 

[jacob j.]

Are you gonna split the case? I can send you a replacement crank that has the wider conrod.

 

[CJ Brown]

Thanks J.J.. I am trying to avoid splitting but that is certainly an option. The bearings feel okay to me so I will try the piston route first.
I would have to fab up a splitter since these things have stuffers and yes, I am lazy lol.

 

[Mastermind]

Are you gonna split the case? I can send you a replacement crank that has the wider conrod.

This would be the best way to go.

 

[MG2186]

I think I have one, let me look

 

[cuinrearview]

Do you have a PN? I have a new OEM 47mm piston but I'm not sure on the boss width. I'll see if I can find it and measure but it may take a minute. I also should have a crank.

 

[CJ Brown]

Do you have a PN? I have a new OEM 47mm piston but I'm not sure on the boss width. I'll see if I can find it and measure but it may take a minute. I also should have a crank.

re: part number - Husqvarna 503920471

edit: The piston should be 46mm. 47mm would be for a 359

 

[cuinrearview]

re: part number - Husqvarna 503920471

edit: The piston should be 46mm. 47mm would be for a 359

Good thing I put 47mm

I promise the crank would fit...

 

[CJ Brown]

I think I have one, let me look

Just wondering if you had a chance to look for that piston?

 

[MG2186]

Just wondering if you had a chance to look for that piston?

I just looked, the piston I have is 47mm. Sorry

 

[CJ Brown]

Thanks I appreciate you taking the time.

 

[CJ Brown]

I am still looking for a piston.

In the mean time, I have order some shims/washers - some in S.S. and some in aluminum. When they get here I will see how they fit and if I think they might work I will post up my findings in a new thread in the chainsaw forum.

 

[jacob j.]

Chris - If you're gonna do the washer thing, I recommend getting thrust washers. Thrust washers are usually heat-treated and withstand the vibration.

 

[CJ Brown]

Thanks J.J. - back to the drawing board lol. I will see what I can find

What if I heat treated the S.S. shims? In fact, if they are true shims, they may be quite hard to begin with - I would have to do a scratch test on them.

 

[Kiwioilboiler]

Do we know the date range for the narrow rod saws lads?
I've just won an 01.

 

[CJ Brown]

AFAIK 2001, 2002, and early 2003 were narrow bearing pistons. Same bearing as 254 -262 series.

 

[Kiwioilboiler]

AFAIK 2001, 2002, and early 2003 were narrow bearing pistons. Same bearing as 254 -262 series.

Typical.
Looks like I'm splitting one of the welded case ones here for a crank swaperoonie then.

 

[Josh0619]

I have a used piston