Walbro Questions
 

With my soon to be venture into large scale gas engines and planes, I have read and read the net and found a wealth of information on Conversions, Poulan, Echo, Ignitions, and every thing else you need to know except........Walbro Carbs. It just seems to me that there is a black hole of Walbro Black Magic hidden that I haven't found. One website I read seems they put the WT-540 on a G-38, G26, and several other engines, but it is no longer made, see the 610 oops it's now a 834, yet last night I saw where a 547 is a replacement for the 540 and they are cheap on ebay(Genuine Walbro)

Is there some sort of application chart out there where I could access that I can make my own carb decisions?

I just got a SUPER deal on 2 G-38s(Old Style) and both engines will be run in a cowl, I think I need to replace the carb for one with a choke.

Shucks, I want to do a conversion engine just because it looks fun and would give me another sense of accomplishment besides my love of model building (do people still do that).

This stuff must be closely held in confidence??? hahahaha

RE: Walbro Questions
 

I dont normally upgrade the carbs so Im only speculating, but I would use the former carb bore size as a starting point. Thats bound to be in a chart someplace. I've had real good luck just rebuilding the carbs. But like you said, if you need a choke and dont have one, you might need to replace it.
Edwin

RE: Walbro Questions
 

Here is a link to a site I have found useful:


http://www.prestwich.ndirect.co.uk/walbrocarbs.htm

RE: Walbro Questions
 

There ya go. A gold mine of info.
Edwin

RE: Walbro Questions
 

Thanks guys. That's great info.

I wouldn't consider an upgrade to the carb with the exception of needing to add a choke.

Thanks again

RE: Walbro Questions
 

Why not use what they are putting on the G-38 now? They are available.The model number is listed at the Zenoah website and Walbros website shows price.

RE: Walbro Questions
 

Well as it turns out I have decided to send the engine to RC Ignitions for an EI treatment and he'll put a choke carb on it at the same time. But I really wanted to get a better grip on carbs.