Buggies Gone Wild Golf Cart Forum

Buggies Gone Wild Golf Cart Forum (https://www.buggiesgonewild.com/index.php)
-   Gas EZGO (https://www.buggiesgonewild.com/forumdisplay.php?f=15)
-   -   cheap carb swap onto 3PG engine- Tecumseh carb works great- with lots of pics (https://www.buggiesgonewild.com/showthread.php?t=70380)

kyerik 09-17-2012 09:02 AM

cheap carb swap onto 3PG engine- Tecumseh carb works great- with lots of pics
 
http://i1233.photobucket.com/albums/...n/102_0620.jpg

(I still need to make a choke linkage)

Tecumseh carb swap pros:

carb mounts with no modifications
BIGGEST PLUS= high speed mixture is fully adjustable! (and you still have a low speed mix adjustment screw)
spring loaded drain button on bowl to check for gas if the engine won't start and to drain water
Integrated air filter- so you can get rid of the large black air cleaner hose

Cons:
Requires making a new throttle and choke linkage
gas line must be rerouted (it simply attaches to the opposite side of the carb)



I bought a 91 marathon about a month ago and did the HEI module/coil conversion and put new crank seals and bearings in it, but it would still only run "fairly good" with the choke about 25% out (130 psi of compression). I also noticed that the throttle shaft "bushing" had a lot of slop in it- which served as a sizable air leak.

Being on a tight budget, I got to looking around at some other old carbs/engine I had laying around and noticed that I had a Tecumseh vertical shaft motor (3-4hp) that came off a craftsman tiller that had a similar float type carb with the same mount spacing (1 3/4") as my 91 marathon with 3PG.

I cleaned the carb out and found that it bolted in place nicely. I rigged up a throttle linkage (I still need to make a choke linkage).

The cart runs good at idle and drives great with lots of power and no backfiring. I love the fact that I can now tweak the high speed mixture.

The bore of the Tecumseh is 20 mm on the intake side and the mikuni is 18-19mm. The Tecumseh carb gasket seals the intake nicely.

Here are more pics:

Note the high speed mix adjustment screw and spring loaded bowl drain on the bottom of the Tecumseh carb

http://i1233.photobucket.com/albums/...n/102_0627.jpg

http://i1233.photobucket.com/albums/...n/102_0626.jpg

http://i1233.photobucket.com/albums/...n/102_0625.jpg
http://i1233.photobucket.com/albums/...n/102_0624.jpg
http://i1233.photobucket.com/albums/...n/102_0623.jpg


http://i1233.photobucket.com/albums/...n/102_0622.jpg

http://i1233.photobucket.com/albums/...n/102_0621.jpg

amesmotorsports 09-17-2012 03:52 PM

Re: cheap carb swap onto 3PG engine- Tecumseh carb works great- with lots of pics
 
Sweet nice job

LiL' rascal 09-27-2012 10:27 PM

Re: cheap carb swap onto 3PG engine- Tecumseh carb works great- with lots of pics
 
Just wondering, is that carb off a 4 stroke motor? I didn't know if a carb off a 4 stroke would work on a 2 stroke?

kyerik 09-28-2012 06:54 AM

Re: cheap carb swap onto 3PG engine- Tecumseh carb works great- with lots of pics
 
Yes- it came off a 3 or 4 hp 4 stroke tiller engine.

Update- I rebuilt my weak fuel pump 1 week after this carb swap and then the carb began flooding. With some research I found that this is a common problem for carbs designed to be gravity fed. Having more than 1/2 psi of fuel pressure can overcome the float valve in the carb and cause it to flood. Rather than buying a super low pressure fuel regulator, I T-ed off the fuel hose going to the carb and ran the line back upstream of the fuel pump and put a small valve in this line to add a little bit of restriction- this way the fuel line going to the carb never builds much pressure. This fixed my flooding problem.


All times are GMT -5. The time now is 09:16 AM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This Website and forum is the property of Buggiesgonewild.com. No material may be taken or duplicated in part or full without prior written consent of the owners of buggiesgonewild.com. © 2006-2017 Buggiesgonewild.com. All rights reserved.