Walbro HD199 Fix

[blsnelling]

The real question is are you, to much time and effort have been wasted already......want to get a burger with me?:msp_smile:

In a heartbeat

 

[thomas1]

My point still stands. IIRC, they have had words, but that has nothing to do with my points validity. And by the way, nothing could be further from the truth about the carb. I have a spare 199 carb here and have never told anyone I could fix it. If I could fix it, I was possibly going to put it on my Dads saw. Talk about jumping to conclusions! That really gives you a lot of credibility.

Where is the jumping to conclusions? In your first post you say you have two carbs that are acting up.

We've all heard about the troublesome Walbro carbs on Husky 357 and 359s. I have a couple here that are acting up as well. I've heard of several people trying to fix these. Does anyone have the lowdown on how to do this? IIRC, it's related to the accelerator pump wearing out. How is this bypassed? I know how to do it on the 200T carbs, but not on this one.

To me this means they are on saws, otherwise they aren't acting up they're sitting in a box, broken. Now you're down to one carb that you may put on your dad's saw, if you can fix it.

Which is it?

I'm quoting you directly, I'm sorry if that makes your logic harder to follow.

 

[blsnelling]

I have one or two, not sure which, 199s setting on my bench. They were given to me, condition unknown. There were originally three, and only one worked. That one went on a saw that I sold a few weeks ago. The other two are duds. My Dads 346 was acting up, so I was looking to see if I could make one of these work.

What gets me, is how some of you don't seem to be capable of having a civil discussion. You've got to turn this into a mud flinging fiasco, and resort to childish attacks. If you can't defend your position otherwise, you might want to reconsider posting at all.

 

[almondgt]

Offering work or knowledge for a fee appears to not go over so well. Is there a lesson there to be learned?

 

[thomas1]

I thought this was a civil discussion? You claimed I was jumping to conclusions and had called my credibility into question. I merely quoted your contradictory statements and now you're calling me a mudslinger.

 

[blsnelling]

You assumed that these carbs were on saws and that I was to fix them for someone else. Neither one is correct.

 

[Justsaws]

Take one all the way apart, clean it and reassemble. Everything off. Run wires, ultrasonic has proven iffy on these for me.

Take the other one all the way apart, clean it. Drill out the factory low side plug. Block off the apump port in the metering side and block off the pump from the inside of the pump cylinder, place entire pump mech back in. Use welch plugs. Set H/L screws 1 1/2 turns fire up saw and tune from there.

Food for thought, typically do not have to pull the alum welch(ap tranfers access hole) on the opposite face of the carb as the brass plug if you are bypassing the pump. That should tell you where to look for "issues" if you want to make a low hour carb with a good pump work. I did not on the one I did Monday or most that I have done in the past.

If you have a Zama that is not transferring from idle to WOT the problem is most likely under the short welch plug. I think it is the 2 holes on the base of the cavity, make them barely, BARELY larger. If you can see the change you went to big. I will have to look at one again, if the transfer is sluggish after that then shorten metering spring and readjust lever. You can do it in either order but I usually go under the welch before the spring. The Zamas will move a lot of fuel.

 

[watsonr]

Looks like Double Cheeseburgers for everyone!!

I'll have the one with square corners... can you have square corners??

:hmm3grin2orange::hmm3grin2orange:

 

[thomas1]

You assumed that these carbs were on saws and that I was to fix them for someone else. Neither one is correct.

Yes, I did. You said you a couple (saws? carbs? Who knows.) that were acting up. Evidently I made the quantum leap that the carbs were on saws. If someone told me "My transmission is acting up" I wouldn't figure their transmission was sitting in the floor of their garage.

I still haven't seen the mudslinging or less than civil discussion. Just because someone doesn't agree with you doesn't mean they're not civil.

 

[blsnelling]

Take one all the way apart, clean it and reassemble. Everything off. Run wires, ultrasonic has proven iffy on these for me.

Take the other one all the way apart, clean it. Drill out the factory low side plug. Block off the apump port in the metering side and block off the pump from the inside of the pump cylinder, place entire pump mech back in. Use welch plugs. Set H/L screws 1 1/2 turns fire up saw and tune from there.

Food for thought, typically do not have to pull the alum welch(ap tranfers access hole) on the opposite face of the carb as the brass plug if you are bypassing the pump. That should tell you where to look for "issues" if you want to make a low hour carb with a good pump work. I did not on the one I did Monday or most that I have done in the past.

If you have a Zama that is not transferring from idle to WOT the problem is most likely under the short welch plug. I think it is the 2 holes on the base of the cavity, make them barely, BARELY larger. If you can see the change you went to big. I will have to look at one again, if the transfer is sluggish after that then shorten metering spring and readjust lever. You can do it in either order but I usually go under the welch before the spring. The Zamas will move a lot of fuel.

Do you mind if I try to document this process with pics? I'll order complete OEM rebuild kits as well. I already drilled the brass plug on one, but did nothing with the acc pump.

 

[blsnelling]

Yes, I did. You said you a couple (saws? carbs? Who knows.) that were acting up. Evidently I made the quantum leap that the carbs were on saws. If someone told me "My transmission is acting up" I wouldn't figure their transmission was sitting in the floor of their garage.

I still haven't seen the mudslinging or less than civil discussion. Just because someone doesn't agree with you doesn't mean they're not civil.

My apologies if I over reacted in that case.

 

[Justsaws]

Do you mind if I try to document this process with pics? I'll order complete OEM rebuild kits as well. I already drilled the brass plug on one, but did nothing with the acc pump.

Go nuts, have some fun. If you are careful you will be able to see the junk stuck in the transfers. It does not take much at all, basically a speck.

The brass plug is a dust cover, you can reuse it just plug the drill hole up with some Dirko or epoxy. The pump mech is all under the shaft. You will be able to tell if the pump system is damaged when you pull it.

Some more food for thought. If you change the bevel of the shaft you can get a bit of a different apump behavior.

In terms of the kit, unless it is warped reuse what you got. I am almost always able to reuse the kits on these carbs, most just did not have enough fuel exposure to warp the diaphrams. However, if you are going to sell it you might want to toss a kit in it.

 

[Mastermind]

And therein lies the rub...this is a hobby to me and you Brad, and probaly the vast majority of folks that will be reading this thread. However to Scott it is his livelyhood, his job, his living.....and that right there is difference between us and him. As someone who has been selfemployed for the last 26 yrs, I can tell you, you not only have to live by your knowledge but your witts as well. I too would like to know the answer to this question however I am in no way irritated by a businessman who has the answer and simply won't "give" it to me...$25.00 is a pitance to pay for knowledge you do not possess, as opposed to $50.00 for a Chinese carb, in my opinion. I've already been the $50.00 route !! LOL!!

A story is in order. I like a good tale.......

I framed homes for a lot of years. I started in Raleigh, NC. All the homes we built were stick framed (no roof trusses), so I learned how to lay out rafters for hip, gambrel, dutch hip, bastard hip, valley rafters, and of course straight run. After moving here I saw that everyone built using trusses and no one knew how to build even with the simplest of rafter layout.

Fast forward about 15 years...........the Frank Betz design was starting to show up in Cookeville and these homes have cut up stick framed roofs. It common for a Betz design to be bastard hip and valley with straight vaults thrown in to complicate things. I ended up very much in demand and kept two crews working framing for several years.

One day it was raining and another framer stopped by the job we were on to look over our framing. Just like porting saws, it's one thing to see the product and quite another to do it yourself. He asked a lot of questions and I gladly answered them.....we talked about run and rise, hip and valley......etc. I showed he a few tricks I had picked up on the finer points of maintaining the correct overhang height by varying the seat cut......and on and on....

A few days later I saw him and a large crew start a house in the same subdivision we were working. I didn't think too much about it......GW hadn't destroyed the economy yet and things were booming. After a few months though......this guy was cutting my prices, hiring low cost help and really putting out some good looking work..... Did I make a big mistake?????

 

[thomas1]

Now I see why you're reluctant to hire that new guy.

 

[dellaquila]

For you financially, yes you probably made a mistake. For the free market and consumers, you did not. You simply created competition which is what our economy thrives on. Even patents expire...

 

[Mastermind]

For you financially, yes you probably made a mistake. For the free market and consumers, you did not. You simply created competition which is what our economy thrives on. Even patents expire...

After a while the were a bunch of guys that learned to frame with rafters and we were nothing special......

I didn't quit because I had no work.

 

[MacLaren]

My house is a Frank Betz. Just as you described.
Good story Randy. Btw, tree monkey rocks!

 

[J.Walker]

I could put my house in order if only I had two NOS Walbro HDA 199 carbs.


.

 

[lmbrman]

this place is hilarious! About the time i joined, scott offers to fix something for free that a bunch of people on here say is junk. Scott gets banned- i think it was a cylinder of some sort. I join and ask about fixin my darn walbro, most people tell me it is complete junk, put on a zama, one guy gives me a detailed description of how to fix it.(Thanks) Scott privately and quietly fixes it for me after reading my post. No charge, no pics, no thread.

Now Scott is a sponsor and offers to fix something very reasonable that few can fix. He gets flamed. Some of the flames are real smiley feel good passive aggressive crap about him. Not cool.

Now I have heard that some builders hire stuff out. Personally, I like the idea of a builder that knows the whole saw, but to each his own.

Brad, you do a great job with your threads,, lots of pics, good spelling, mostly positive sharing attitude.

Why not just hire monkey to fix carbs for ya? Don't you already have somebody else do your machine work ?

I'll prolly get the summer off now :hmm3grin2orange:

 

[Trx250r180]

I hear what you're saying, but in this case, I still disagree. Look at Mastermind, for example. Just like myself, he had been one to share a LOT. It certainly hasn't hurt his business. If anything, it's made it. He does this for a living too, and last I knew, had a couple week back log.

his threads didnt help get these done View attachment 237433