Husky 55 closed port

[Fifelaker]

I have a closed port jug, I am in need of a piston for. LRB is a no, Traverse Creek is a no. I have heard of some alternatives, but I don't remember what they were. Anyone have the answer?

 

[5155]

Hl Supply has them listed.
You might want to measure the bore.

 

[Stump Shot]

https://www.hlsproparts.com/Husqvarna-55-55-Rancher-windowed-piston-kit-p/h31055-w.htm

 

[5155]

The last smaller one I got at lrb.
Maybe it was their last one as I see none now.

There are guys that can machine others to work.
That's above my intel.

 

[SimonHS]

I think you will need a windowed 45mm piston. I can only see pop-up pistons available:

https://ebay.com/itm/POP-UP-PISTON-...-CLOSED-PORT-PISTON-45MM-NEW-USA/144312555365

 

[Stump Shot]

Hl Supply has them listed.
You might want to measure the bore.

Yes, seems to me I had one like this and it was the bore of a 51
Might be farmertec made one like that, its been a while now...

 

[wcorey]

Can also use a slab sided piston like a 51 and grind out the lower transfers to match the crank case, makes it bottom fed and works fine.

 

[Stump Shot]

I think you will need a windowed 45mm piston. I can only see pop-up pistons available:

https://ebay.com/itm/POP-UP-PISTON-...-CLOSED-PORT-PISTON-45MM-NEW-USA/144312555365

I think you're right, I believe I still have that windowed 46mm piston come to think of it.

 

[5155]

I have saws with both sizes open and closed.
Either their badges mean nothing to bore size, OR, the top ends were changed before I got em.

Best runner I had was small bore cp that I bought new.
It is labeled 51.

 

[huskihl]

I think the 51 and cp 55 were both 45mm. Open port 55 was 46mm

 

[cus_deluxe]

I have saws with both sizes open and closed.
Either their badges mean nothing to bore size, OR, the top ends were changed before I got em.

Best runner I had was small bore cp that I bought new.
It is labeled 51.

Ive never heard of a closed port cylinder on a 51, unless you got urself a unicorn.

I think the 51 and cp 55 were both 45mm. Open port 55 was 46mm

correct

 

[cus_deluxe]

If it was me, id use a 51 piston and drill/endmill on each side of wrist pin boss to feed lowers, its been done before dot dot dot

 

[5155]

I thought the 51s were 45 and 55s 46.
You guys have more experience.

I tried researching this the other year and found disagreement and realized what mattered was keeping running.

 

[cus_deluxe]

It is exactly as kevin said above. If you have an oem 45 mm closed port cylinder, its from the "non-rancher" 55, built only a couple years. If you have a 44 mm closed port that fits this platform, its from a partner 5000/jonsered490/poulan pro 325.

 

[Ronie]

I did both of my closed port saws like @wcorey said but used 353 pistons.

 

[wcorey]

Partner 5000+, jred 490 44mm

jred 590, cp 55, op 51 45mm

op 55, pp325, partner 5500 46mm