Walbro HD199 Fix

[Hedgerow]

did you realy think you would get you zama fixed reading a walbro thread?

you standing down wind of randy?

As a matter of fact, yes...
I replaced the Zama with a Walbro...
The lesser of 2 evils...
:msp_rolleyes:
And fortunately, the jet stream keeps me up wind of randy...

 

[Hedgerow]

Unlikin' your posts umpkin2:

Repped!!!

 

[Gologit]

opcorn:

 

[brokenbudget]

having a carb shipped down around that area and back is about 40bux. so add that to the 25 and it's still cheaper than a carb from the dealer up here.

 

[barneyrb]

having a carb shipped down around that area and back is about 40bux. so add that to the 25 and it's still cheaper than a carb from the dealer up here.

And the replacement Zama won't run close to the 199......

 

[thomas1]

And the replacement Zama won't run close to the 199......

And if you can find a NOS 199 there is no guarantee that it will work correctly. :msp_wink:

 

[sunfish]

I ship stuff all around the world.......

Same here. USPS :hmm3grin2orange:

 

[sunfish]

and sometimes it even gets there!:hmm3grin2orange::hmm3grin2orange::hmm3grin2orange:

Chainsaws yes! USPS has a problem when it come to chainsaws... :msp_mellow:

 

[Trx250r180]

a good friend of mine recomends UPS for shipping to canada :cow:

 

[Mastermind]

a good friend of mine recomends UPS for shipping to canada :cow:

Oh yeah.

 

[wcorey]

drill a 1/8 " hole in the center of the metering cover.
set the lever level with the carb body,
you need at least 15 psi of popoff
report back with your results

Wow, I leave for 24 hrs and come back to 5 pages of new nothing… No one has even tried this yet?

I have a couple hours to play around this morning, so, drilled the hole, lever was ok, checked pop off and it was ‘at least’ 15psi.
Fired it up. No change that I can notice. Tried the other carb, still no change.
Still wonder if the problems I'm experiencing are 'other than the usual issues'...

But...
Pop off pressure on these things is insane. When I played around changing it previously, I didn’t actually measure it,
just changed spring tension around some.
Had I bothered to check the numbers, it would have raised some flags.

How close do I need to be to 'at least' 15psi?
Seems it would either need a mere wisp of a spring or I’d need to increase the area of the needle seat/passage (pretty small on these).
Or am I missing something obvious here?


Having a keen perception of the obvious is an under-rated skill…

 

[Mastermind]

Wow, I leave for 24 hrs and come back to 5 pages of new nothing… No one has even tried this yet?

I have a couple hours to play around this morning, so, drilled the hole, lever was ok, checked pop off and it was ‘at least’ 15psi.
Fired it up. No change that I can notice. Tried the other carb, still no change.
Still wonder if the problems I'm experiencing are 'other than the usual issues'...

But...
Pop off pressure on these things is insane. When I played around changing it previously, I didn’t actually measure it,
just changed spring tension around some.
Had I bothered to check the numbers, it would have raised some flags.

How close do I need to be to 'at least' 15psi?
Seems it would either need a mere wisp of a spring or I’d need to increase the area of the needle seat/passage (pretty small on these).
Or am I missing something obvious here?


Having a keen perception of the obvious is an under-rated skill…

I've ported six cylinders in the last 48 hours........nope, I ain't played with any carbs. If I need carb work I send it out most of the time......keep trucking. I'm watching.

 

[Justsaws]

Walbro's suggestions.

Reseat should occur around 10psi less than the pop off. Reseat is more important than pop off until pop off is way wrong.

Fuel pump produces 5-7 psi.

Atmo is 14.7 at sea level.

Pop off pressure will vary carb to carb.

Lots of folks drilled atmo vents in the covers.

Zama suggests that you not bother testing pop off, you could damage some carb parts.

 

[barneyrb]

And if you can find a NOS 199 there is no guarantee that it will work correctly. :msp_wink:

It will if you spend $25 on it.........

 

[thomas1]

It will if you spend $25 on it.........

Funny how that works, huh?

 

[J.Walker]

Should I send these three new Walbros to Scott for adjustment before they get put into service?

 

[modder]

Teehee.......it works. Both WOT and idle. tee hee, tee hee. I feel like a school boy on prom night. Thanks to Scott for his tips.

 

[thomas1]

Teehee.......it works. Both WOT and idle. tee hee, tee hee. I feel like a school boy on prom night. Thanks to Scott for his tips.

Any chance you could post a vid?

 

[tpope]

Teehee.......it works. Both WOT and idle. tee hee, tee hee. I feel like a school boy on prom night. Thanks to Scott for his tips.

Congrats...

 

[modder]

Any chance you could post a vid?

Funny guy. You gonna try peeing on my leg again tonight.