Author Topic: Husqvarna 50  (Read 5640 times)

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Offline David Young

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Re: husky 50 300th anniversary
« Reply #10 on: April 23, 2011, 11:38:26 am »
I think the only prob was not a bolt pattern issue but a piston clearance issue with the case.

D

Offline Cut4fun

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Re: husky 50 300th anniversary
« Reply #11 on: April 23, 2011, 11:44:21 am »
hey cut, know of anybody that has a 5000 topend around?

I took another extra 5000 plus 490 top end in. I have one guy inline before you, sent pm so you know.
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Offline SawTroll

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Re: husky 50 300th anniversary
« Reply #12 on: April 23, 2011, 12:29:12 pm »
I had read somewhere that husky 50 had 2 different cyl bolt patterns for early and late. You know anything about this Spike or others?  I cant get the pdf file to open that it was in to post for you.

......

I have a paper copy of a SB from 1990, that tells the change happened 1989 week 19, at serial 9190006. The new version was called 50 Special, and had a 45mm top end.

Offline Cut4fun .

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Re: husky 50 300th anniversary
« Reply #13 on: April 23, 2011, 02:30:05 pm »
It's in that link above with pics too.

MODEL: 50 SPECIAL REPLACES 50 RANCHER FROM SERIAL NUMBER 9190006

The differences between the model 50 S and 50 R are among other things that the displacement
is increased from 49 cm3 to 51 cm3 and that the SA-silencer is replaced.
Due to the changes above, the 50 Special has gone through a for each country new specific
testing procedure. This means that no 51 cm3 cylinders should be mounted on saws with
lower serial number than 9190006.
The 51 cm3 cylinder base does not fit the crankcases of older 50 R models.




The 51 cm3 cylinder base has the outer diameter of approx. 49,7 mm (the outer diameter
of the piston = 45 mm).
The 49 cm3 cylinder base has the outer diameter of approx. 47,9 mm (the outer diameter
of the piston = 44 mm)
The inner diameter of the new crankcase is approx. 50,5 mm (this crankcase is identified
with the improvement code F)
The inner diameter on the old crankcase is approx. 48,5 mm
Old crankcase New crankcase (F)
2: X 90.111-26 7.6 01-90
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Offline brokenbudget

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Re: husky 50 300th anniversary
« Reply #14 on: April 24, 2011, 09:05:00 am »
hey cut, know of anybody that has a 5000 topend around?

I took another extra 5000 plus 490 top end in. I have one guy inline before you, sent pm so you know.

kevin, thanks for the info on the different sizes. 8)
didn't see any p.m. from you on the cylinder though. ;D
yep i looked. it is a 45mm case so i guess this is a go for me.
if i don't end up with a good 5000p/490 top i'll buy that 46mm 51/55 top from bailey's and run it. :)
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Offline Spike60

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Re: husky 50 300th anniversary
« Reply #15 on: April 24, 2011, 09:54:19 am »
Well, I built my 50Magnum last night using the 490 top end. Kinda sorta. I'll try to get some pics posted during the week.

The 50 bottom I had turned out to be unuseable, so I went with a 55Rancher chassis that I had and moved the 50's externals over to get the earlier look. I bagged the idea of using the 50's choke and filter set up, as the 55's was right there on the bench. Decided to just modify the gray top to clear the choke lever and air filter. Going to give it a run today and see what she does.

Also did a little research at the store on all of these different cylinders yesterday morning. It seems that I may have gotten the last, or at least one of the last closed port 55 cylinders from Husky a couple weeks ago. (it's going on a cosmetically perfect 55 I have.) I entered the same part number into web order and it got superceded up to the open port 55 set. So, we may have seen the last of them.
Husqvarna-Jonsered

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845-657-6395

Offline brokenbudget

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Re: husky 50 300th anniversary
« Reply #16 on: April 24, 2011, 12:01:20 pm »
I bagged the idea of using the 50's choke and filter set up, as the 55's was right there on the bench. Decided to just modify the gray top to clear the choke lever and air filter. Going to give it a run today and see what she does.

good call. the filter/choke set up was always a crap design imo. you could never trust the filter to flex back and seal properly. and sometimes it would just move itself right off the mount letting in all sorts of junk. then if it was doing it's job some people had the problem of the filter bring pulled into the carb and choking it at full throttle.
when I grow up, i wanna be an adult.

Offline Spike60

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Re: husky 50 300th anniversary
« Reply #17 on: April 24, 2011, 12:36:24 pm »
I bagged the idea of using the 50's choke and filter set up, as the 55's was right there on the bench. Decided to just modify the gray top to clear the choke lever and air filter. Going to give it a run today and see what she does.

good call. the filter/choke set up was always a crap design imo. you could never trust the filter to flex back and seal properly. and sometimes it would just move itself right off the mount letting in all sorts of junk. then if it was doing it's job some people had the problem of the filter bring pulled into the carb and choking it at full throttle.

Everything you said, plus I realized that building it on the 55 I wouldn't have a throttle lock unless I swapped tanks or trigger assemblies. And I also knew that the 55 carb was fine, but had no idea about the carb that was on the 50.

What you said about the 50's setup is dead on. I think that the flexibility of that air filter was only correct for a certain period of time. New, they were a little too stiff; they'd be OK for a while; but then they'd become too flexible causing the problems you mentioned.
Husqvarna-Jonsered

Ashokan Turf and Timber

845-657-6395

Offline brokenbudget

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Re: husky 50 300th anniversary
« Reply #18 on: April 24, 2011, 07:18:37 pm »
i like it when you get one of these saws in, and the filter has been passing for a while with no scoring on the intake side of the piston. nothing wrong with the saw except that big pile 'o' sawdust in the case ;D
i can't remember how many i've had to stuff a rag down in there and give the crank a turn to scoop up that mess :D
at least it comes out without scattering and fouling up the bearings. i guess thats what the oil is for, keeping the dust sticking to itself.
when I grow up, i wanna be an adult.

Offline brokenbudget

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Re: husky 50 300th anniversary
« Reply #19 on: April 28, 2011, 04:36:12 pm »
well, the clutch shoes and spring are in, now i need to order the oiler line and pump gear. the pump gear was (WAS) fine, until i misplaced it :o  of course, i cleaned up the shop yesterday before i noticed it was mia. ;D
when I grow up, i wanna be an adult.

 

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