Project Stumpbroke Husky 359

[wigglesworth]

Is that what you found on yours? Mine does have the Walbro on it, so maybe that's a good thing.

Yep. The popoff pressure was over 40lbs. Even with the pop off pressure fixed, it still wouldn't hold a tune. Slapped on a 199 walbro, and bingo, no more probs.

First I've heard that. My ported OE has the 357 Zama carb and it does fine?

Once u go so far with the port work, they just won't feed it. Myself, randy and terry all had the same problems, all with brand spankin 357 zama's.

 

[tree monkey]

note to self hold shift key down

 

[Stumpys Customs]

As long as the carb isn't givin any troubles, there's no reson to replace it. I'm finally geting this thing back together.

 

[jnl502]

Have you put a degree wheel on it yet? Did you have some timming #'s in mind before you started or did you cut the squish then raise the ports the same? Just wondering how you decide what to start with first. Also which #'s do you want to change to make more power?
Looks good btw.
jnl

 

[Stumpys Customs]

note to self hold shift key down

Thats bold not caps :bang:

 

[Hedgerow]

As long as the carb isn't givin any troubles, there's no reson to replace it. I'm finally geting this thing back together.

OK... I'll check it out in person when I drop off this blue thing... Of beauty!!!

 

[sunfish]

Yep. The popoff pressure was over 40lbs. Even with the pop off pressure fixed, it still wouldn't hold a tune. Slapped on a 199 walbro, and bingo, no more probs.



Once u go so far with the port work, they just won't feed it. Myself, randy and terry all had the same problems, all with brand spankin 357 zama's.

Thanks for the info, Wiggs.

 

[wigglesworth]

As long as the carb isn't givin any troubles, there's no reson to replace it. I'm finally geting this thing back together.

The walbro on mine runs great now. From what I understand, u either have a good walbro, or a bad one. Some run years with no trouble, some are junk from the get go.

 

[outdoortype]

The walbro on mine runs great now. From what I understand, u either have a good walbro, or a bad one. Some run years with no trouble, some are junk from the get go.

Yes I often wondered the same thing until my older '04 started acting up. It seemed like the same carb was in production for 7-8 years before they started having all those problems. Just wondering if ethanol infected gas became more commonplace and that caused the seals around the accelerator pump to degrade/fail?

 

[Hedgerow]

Ran the 359... :msp_wink:
I like...

 

[ndlawrence]

Ran the 359... :msp_wink:
I like...

It ain't right I tell ya! Running my saw before me that is

 

[Hedgerow]

It ain't right I tell ya! Running my saw before me that is

It sure ain't your daddy's 359!!! You'll be needing the decomp button too...
Just sayin'...

 

[ndlawrence]

It sure ain't your daddy's 359!!! You'll be needing the decomp button too...
Just sayin'...

That's what I like to hear! What's the comp numbers?

 

[Hedgerow]

That's what I like to hear! What's the comp numbers?

Higher than it was...:msp_wink:

 

[ndlawrence]

Higher than it was...:msp_wink:

LOL I would hope so

 

[Stumpys Customs]

Here it is!!!
[video=youtube_share;gNLiXTvaBKs]http://youtu.be/gNLiXTvaBKs[/video]

 

[Stumpys Customs]

That's what I like to hear! What's the comp numbers?

Not as high as the Deere, but it has a bigger combustion chamber. It pumped up to 185psi. It was pullin around 11,000 rpms (in the cut) in the vid.

I'll post the rest of the pics & the numbers here in a bit. I got some cleanin up to do outside.

 

[atvguns]

12 seconds faster

 

[Stumpys Customs]

I ended up useing the original muffler since it was easier to gut. Here's what was inside of the "CAT" muffler.

This is what I took out.

I build the shrouds out of sheet metal.

I painted it with high temp engine semi gloss black.

 

[Stumpys Customs]

Here's the stock timing #'s.

EX 105*
dur 150*

TR 122*
dur 116*

IN 104*
dur 152*

BD 17*
SQ .037"

Stumpbroke #'s

EX 100*
dur 160*

TR 114*
dur 132*

IN 97*
dur 166*

BD 14*
SQ .020"