Walbro carbs

[mkinslow]

Alright boys i need help. And yes I've used the search but can't find the info I've seen before on here. My dad flys rc planes and one in particular that belonged to my grandfather. It's an extra 300. Don't remember scale size on it but if I remember correctly it's an 80" wingspan. Anyway. It has an old zenoah 32cc weed eater engine that my grandfather cut down and made for the plane. It has a walbro 197a carb on it that my father rebuilt about a month ago. All it wants to do is start on choke and run about 10 secs and die. My question is this 197a part of that bad batch of walbro carbs that exists and what is a crossover carb for it. Thanks guys

 

[HarleyT]

You will need to put up a Walbro Model first. Or at least a model number of the original trimmer.
But in general, there is no "cross over chart".

 

[HarleyT]

Put up some pics. If it has a new kit, just go through the carb again.

 

[mkinslow]

I don't have any pics at this time brother. He's supposed to bring it to my shop tomorrow if it's not raining. I've been back through the carb several times since he did it. Cleaned everything etc. I've got a couple of extra carbs that will work if we can get it here too try them. Just trying to figure out and remember if the 197a was in the series of bad walbros

 

[mkinslow]

We can't remember what the original trimmer was. It's been about 8 years since my grandfather made it and he's been gone for 4 years so.

 

[mkinslow]

197a is on the carb

 

[Chris-PA]

Not familiar with how they are set up for RC planes - does it use an idle setting with the throttle plate closed or is it always open on the H fuel circuit?

 

[ray benson]

Looks like it was replaced with WA-197-1 according to
https://www.m-and-d.com/WL-WA-197A.html
Looked it up on walbro site
https://walbro.force.com/parts/comm_partsservicedetails?partId=a0Fo000000V5CICEA3

 

[mkinslow]

Thanks bud I knew I had saw it somewhere but couldn't find it anymore

 

[HarleyT]

so it is a WA?

 

[mkinslow]

They are set up just the same on the planes as they are on the equipment they're made from. HarleyT our carb doesn't say WA. It just has 197a stamped on it

 

[HarleyT]

what else is near there?

 

[Conquistador3]

If the engine is that displacement, it's highly likely to be a G320, a very common engine for RC models.
The engine is still manufactured for RC applications and the present version uses a Walbro WT-1107 carburetor.

As usual caveat emptor, check before buying etc.

 

[mkinslow]

Nothing I remember seeing

 

[mkinslow]

If the engine is that displacement, it's highly likely to be a G320, a very common engine for RC models.
The engine is still manufactured for RC applications and the present version uses a Walbro WT-1107 carburetor.

As usual caveat emptor, check before buying etc.

Yes sir you are correct