OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions on Other Engines 139 cc Chonda carby

Hi,

I have a 139 cc chonda with a gummed up carby. Its a Big Dint 3 carby.

I'm just wondering if the common replacement for the 160cc model will work OK. Plenty around for horizontal shaft engines as well. Will they fit? I have 2 Chondas, one has an integral fuel tap, this one does not.

All the best
Jeff

Sorry Jeff I can't help. I bought 3 of those $10 ebay carbs a while back but just haven't had the time to fit any of them to see if they will work. I can't see why they would be an issue. Hopefully in the next few days I might get a chance to play with one.

Thanks Norm,

I think they would be OK. I'll have a try at cleaning the old one first. Starts (on choke) but does not run.
Maybe main jet clogged? I'm not usually very successful cleaning carbys but I'll try.
Anyone know anything about cleaning Honda or Chonda carbys?


All the best
Jeff

Hi Jeff, I have not had a lot of joy with cleaning them, everything looks fine but they still cause the sort of problems you describe, for the sake of a $10 carby not worth the time messing about with the old ones and I usually find the Chonda ones are rusty anyway.

Thanks Norm,

I had a go. Main jet was very difficult to get out but when I eventually did it was completely clogged with very hard material that was hard to get out. Carby cleaner softened it enough to mostly clear it. Emulsion tube was clean. Needle valve & seat also pretty dirty but cleaned up OK. A little rust on the bottom of the bowl but that scraped off OK.

Put it back on and away she went. Now I just need to figure out all those levers in the governor set up. It starts easily but wont rev much and the choke comes on early. The stop switch also needs a little extra pressure at the actual switch for it to work. I suspect previous owner has been fiddling with some of those adjustments. He thought it might need a new spark plug.

It runs very sweetly. I think I will persevere. Anyone know how to adjust those levers?

All the best
Jeff

Which levers do you mean Jeff. The lever I have to bend down is the choke lever where it operates down on the motor. What it has to do is when you open the throttle fully to start, it must also fully close the choke butterfly which you can see with the air filter inner housing removed. If it doesn't fully close you often will not get it started

Thanks Norm,

No the choke works fine now after I sprayed some WD40 all over the levers. The only problem is it runs too slow even at full throttle just before the choke comes on. Seems like the governor is set too slow. There is a lot of springs and levers there and there is a screw adjustment I'm just not sure what it does yet. And the stop switch does not quite activate yet.

I'll study it a little more. Need to take some tension off the governor spring if I could work which one that is.

Anyway good progress so far thanks for your help.

All the best
Jeff

Jeff I will have a look at one tomorrow but it is a fairly simple setup.It can be a bit fiddly with the throttle control going from closing the choke to at the other end getting the kill switch to work, which is why you may have to bend the choke lever so you get a bit more cable travel to reach the kill switch

Hello gents.
All the chonda setups are cheap and nasty but that doesn't mean they're not fixable.
The first thing we need to determine is which one you have so a couple of photos of the linkages etc will make our job of helping you a lot easier.
A photo of the setup in the off position and one of it in the run position(choke off) would be ideal
Cheers, Ted

Hi,

The Chonda is running fine now. I did resort to Youtube and found a Honda site. The Chonda is not exactly the same but close. That screw adjustment I mentioned is the maximum governed speed adjustment. I just loosened it off a few turns and up the revs came till its plenty fast enough now. Interesting that backing off the screw increased the speed. Perhaps that's all the previous owner had fiddled with.

I fixed the stopping problem by just stretching its actuating spring slightly.

This machine (A Rockwell) seems like it has done just a couple of hours work. The paint is perfect even underneath.

I am starting to wonder if these Chondas are as bad as I previously believed. It runs beautifully (dare I say it - like a Honda) starts very easily, what else do I need.

Thanks again to all who helped.

Jeff