Husqvarna 359 w/ 372XP Crank... Is it possible?

[ZukiRyder440]

I have been some crazy ideas lately... this is one of them... Husqvarna 372 crank in a 357/359 chassis. BUT... I have a lot to figure out before I can start tinkering..

1- Is there enough material on the cases to bore out the existing bearing pockets to accept the 372 crank bearings?
2- Width of the crank (outside of lobe to outside of lobe)
3- How much bigger are the lobes on a 372 crank
4- Is there enough meat in the case around the 359/357 crank to make the pocket bigger? If not, maybe beef it up with some welding and mill it flat.
5- Spacer thickness (if I need one, that will come later)
6- Measure the inside + outside diameter of the 359 and 372 seals so I get an idea of what material needs to be removed.

Still a lot more things to figure out...

 

[jacob j.]

Anything is possible if you're willing to put enough work into it. I saw a 394 once that had a 3120 crank and top end. It had a lot of machine work done. I also saw
a Dolmar 166 once that had an 090 top end.

 

[huskihl]

Inner vs outer clutch also

 

[cuinrearview]

Didn't *s-wordsaw Jim do one with a 272 crank? Or was that just a 272 top end?

 

[ZukiRyder440]

Inner vs outer clutch also

Yup.

 

[ZukiRyder440]

Didn't *s-wordsaw Jim do one with a 272 crank? Or was that just a 272 top end?

He did one with a 272 top end

 

[ZukiRyder440]

Do 359s run SKF 6202s because if so, those are the same bearings as a 372

 

[ZukiRyder440]

And with the 36mm stroke, the displacement would only go up to around 62cc. Who knows, it could be an animal when its all said and done.

 

[ZukiRyder440]

Probably Monday Ill get some measurents down and start planning

 

[cuinrearview]

Do 359s run SKF 6202s because if so, those are the same bearings as a 372

Yes same bearings

 

[Czed]

I have been some crazy ideas lately... this is one of them... Husqvarna 372 crank in a 357/359 chassis. BUT... I have a lot to figure out before I can start tinkering..

1- Is there enough material on the cases to bore out the existing bearing pockets to accept the 372 crank bearings?
2- Width of the crank (outside of lobe to outside of lobe)
3- How much bigger are the lobes on a 372 crank
4- Is there enough meat in the case around the 359/357 crank to make the pocket bigger? If not, maybe beef it up with some welding and mill it flat.
5- Spacer thickness (if I need one, that will come later)
6- Measure the inside + outside diameter of the 359 and 372 seals so I get an idea of what material needs to be removed.

Still a lot more things to figure out...

Finish one saw before you start another.

 

[ZukiRyder440]

Finish one saw before you start another.

I know Im just thinking thats all. Im gonna get my 266 done soon.

 

[ZukiRyder440]

I just had a few thoughts... What if I could use a 372 crank with a 272 top end, if I could figure it out it could be a freakin monster.

I did some research and the 272 has the same stroke as a 359. SO... a 52mm top end plus and additional 2mm stroke would bring me to 76.45cc!!! That is a 17.45cc gain in displacement!!

 

[huskyboy]

The inboard clutch 372 crank won’t work on the outboard clutch setup the 359 uses without serious modifications if I had to guess.

 

[Czed]

I just had a few thoughts... What if I could use a 372 crank with a 272 top end, if I could figure it out it could be a freakin monster.

I did some research and the 272 has the same stroke as a 359. SO... a 52mm top end plus and additional 2mm stroke would bring me to 76.45cc!!! That is a 17.45cc gain in displacement!!

Bore out the 359 to maximum
Then chrome plate a piston that'll fit
Some Old poulans were built this way.

 

[ZukiRyder440]

The inboard clutch 372 crank won’t work on the outboard clutch setup the 359 uses without serious modifications if I had to guess.

Im thinkin of using the outboard 359 style clutch but I would have to modify the pto side of the crank i bet

 

[ZukiRyder440]

Bore out the 359 to maximum
Then chrome plate a piston that'll fit
Some Old poulans were built this way.

Now thats not a bad idea!