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G-38 Carb Replacement - 5/11/2008 5:05:58 AM   
AIRPLANENUTS



Posts: 824
Joined: 7/21/2003
From: atlanta, GA, USA
Status: offline 		Guys,

I have an older G-38 with the original carb w/no choke. I want one w/ a choke, and I've read the WT-540 is a great replacement, and Horizon shows the WT-338 as the o.e. replacement.

Does anyone know if either or both carbs will fit the spacer block on my old engine, with the same odd-ball linkage as the original? Do you have a good source for your carbs?

Thanks,
Rick

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RE: G-38 Carb Replacement - 5/12/2008 2:47:07 AM   
flatspin_king


 

Posts: 6
Joined: 7/23/2007
From: NY, NY, USA
Status: offline 		I recently bought a wt 540 for my G38. Dont know if my engine is the older version because I bought it as a short block - but I am guessing that it is since it was from an estate sale.
The carb fit perfectly on the spacer. As far as I know all WT carbs have the same bolt pattern. I also managed to turn the spacer around to provide a straight linkage for the throttle - this can be done with minimum effort!

I bought mine on ebay - under lawn equipment >chainsaws, from a seller going by 'michaelr'. Still havent had time to run it yet though.
Hope this helps.

(in reply to AIRPLANENUTS)
       Post #: 2

RE: G-38 Carb Replacement - 5/12/2008 4:11:21 AM   
buck1856



Posts: 673
Joined: 10/16/2002
From: superior, AZ, USA
Status: offline 		Go to ebay and look up:
[ecedwards_tools].i buy all my carbs from him-$9.00to-$14.00 uasually.brand new.never had one fail me yet.

(in reply to AIRPLANENUTS)
       Post #: 3

RE: G-38 Carb Replacement - 5/12/2008 12:21:00 PM   
ljones5000


 

Posts: 445
Joined: 7/16/2002
From: Fayetteville, NC, USA
Status: offline 		I changed mine to the WT 338-1 with choke and I used the EasyLink carb adapter from Horizon. It works fine. I bought the carb from VE Petersen Co, do a Google.

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Larry

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RE: G-38 Carb Replacement - 5/12/2008 4:09:12 PM   
AIRPLANENUTS



Posts: 824
Joined: 7/21/2003
From: atlanta, GA, USA
Status: offline 		Thanks, guys. Ebay it is!

Buck, do you have a phone number for ecedwards_tools? I want to call him and buy direct.

Thanks,
Rick

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"Futaba gets it right the first time."

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RE: G-38 Carb Replacement - 5/12/2008 5:36:02 PM   
Hogrider



Posts: 49
Joined: 4/3/2003
From: Buffalo, MN, USA
Status: offline 		Hi Rick,
You may want check on inter-changability.
If your G38 has the skinny iron prop hub, i don't think the carbs can be switched because the small holes may not line-up between the newer WT 338 and the old style G38 carb flange. It will bolt on, but the small holes may not line-up. The newer style G38 has the larger aluminum prop hub with the WT 338 carb.

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Hogrider
THINKING IS HARD WORK!!

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RE: G-38 Carb Replacement - 5/13/2008 9:55:13 PM   
AIRPLANENUTS



Posts: 824
Joined: 7/21/2003
From: atlanta, GA, USA
Status: offline 		Thanks, Hogrider. Does anyone know exactly how I would find out which carb fits my engine?

Thanks,
Rick

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"Futaba gets it right the first time."

(in reply to Hogrider)
       Post #: 7

RE: G-38 Carb Replacement - 5/13/2008 10:03:41 PM   
Hogrider



Posts: 49
Joined: 4/3/2003
From: Buffalo, MN, USA
Status: offline 		Check with Ralph at rc@rcignitions.com

or at rcignitions.com

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Hogrider
THINKING IS HARD WORK!!

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RE: G-38 Carb Replacement - 5/14/2008 5:24:35 AM   
buck1856



Posts: 673
Joined: 10/16/2002
From: superior, AZ, USA
Status: offline 		No i dont have his phone number as i buy and sell on ebay and hes saved in my sellers folder.I do it this way as we both recieve feedback from our transactions.I would do as suggested by calling ralph.Whatever number he gives you try ecedwards.I have an assortment of carbs here that i could matych up and if not i could order from ecedwards but it would take a while us doing all this swapping.Ill go look at what horizon says.

(in reply to AIRPLANENUTS)
       Post #: 9

RE: G-38 Carb Replacement - 5/14/2008 5:45:09 AM   
buck1856



Posts: 673
Joined: 10/16/2002
From: superior, AZ, USA
Status: offline 		I checked horizon and the 338 has a 13.49 venturi after checking walbros specs.The pic of the 338 on horizon shows the pulse hole centered.I have 2 carbs here that are 13.49 venturi,#34 in intake.One of mine has the automatic choke,this when flipped on,stays on until the throttle is moved.Operated by a spring.Its number is WT542,has a nice throttle arm for easy hookup.
The other one has 2 nice long shafts sticking out of carb for a easy fit of the steering arm or throttle arm from the easy carb kit from Horizon.This has the standard choke setup.Its number is WT414.Both of these i bought from ecedwards.
Niether one of these has the primer bulb.To me i think these are a little large because these are what i run on my 45-52cc engines.Anyway,these match the venturi that horizon says.Both of mine have the pulse hole centered.

(in reply to AIRPLANENUTS)
       Post #: 10

RE: G-38 Carb Replacement - 5/14/2008 12:54:10 PM   
Hogrider



Posts: 49
Joined: 4/3/2003
From: Buffalo, MN, USA
Status: offline 		Hi,
Before I would swap or buy anything, I would check with the expert (Ralph). That way you can make a educated decision.
He also makes a Carb Adapter (a little thinner than stock) to bring inline the throttle lever with the Throttle Servo Rod, for a straight push-pull action.
You might want to check-out his Battery Ignition System. Much lighter and easy starting than the stock G38 Mag System.

Ralph Cunningham - Owner
1800 Whitehall Dr.
PO Box 636
Williams, AZ
USA
86046

928-635-2455




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Hogrider
THINKING IS HARD WORK!!

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RE: G-38 Carb Replacement - 5/14/2008 4:03:34 PM   
AIRPLANENUTS



Posts: 824
Joined: 7/21/2003
From: atlanta, GA, USA
Status: offline 		Buck and Hog, thanks for all your info.

Rick

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RE: G-38 Carb Replacement - 5/15/2008 4:33:54 PM   
flatspin_king


 

Posts: 6
Joined: 7/23/2007
From: NY, NY, USA
Status: offline 		Rick,
Here are a couple of pics of my G 38 in the process of being converted to ei. The carb block is rotated and a new pulse hole drilled. the old one can either be covered by the two gaskets on either side or filled with some epoxy. I also mix the epoxy with chopped fiberglass strands to fill any counter sunk holes etc I dont need and to make it look more "professional". I have been doing this on all my 'conversion' engines and its worked out great so far- no air leaks etc..




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(in reply to AIRPLANENUTS)
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RE: G-38 Carb Replacement - 5/15/2008 9:49:06 PM   
AIRPLANENUTS



Posts: 824
Joined: 7/21/2003
From: atlanta, GA, USA
Status: offline 		Thank you, King. Is that the WT-540 carb? Your job looks good to me.

I'm not sure when my G-38 was manufactured, but I did find that it has the aluminum prop shaft, and the WTA6A carb w/no choke.

I found a useful article, both in terms of carb replacement and ignition conversion. Looks like the WT-540 is a bolt-on fit:

http://tech.flygsw.org/g38ignition.htm

The WT-540 is the way I wanna go, as I like the auto choke shutoff and large bore.

_____________________________

"Futaba gets it right the first time."

(in reply to flatspin_king)
       Post #: 14

RE: G-38 Carb Replacement - 5/16/2008 3:48:58 AM   
buck1856



Posts: 673
Joined: 10/16/2002
From: superior, AZ, USA
Status: offline 		Look at my pics,i have the WT542 as i posted ealier.Looks like the same as the 540 but with just shorter needles.
Go to ecedwards_tools.I just looked.Click on carbs.
WT540$14.99
Wt542[like mine]-$12.99mine has the auto choke also as you can see in the pic.

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