1990 Marathon EZGO 3PG GAS Pours out of Carb!

[Jim Dandy]

Hello, I've spent literally days trying to diagnose my issue to which there are several others who've experienced the same and I've read many many posts with no solution.

Question One - are these after market fuel pumps all the same because they look the same all for under $20 with the exception of the one and only "Makuni" made in Japan and sells for $120 ??? Mine is the one without the third nipple for a vacuum hose.

I just replaced my cart with a brand new Carburator out of china. I actually bought two because they were so cheap. The issue Im having is that the cart seems flooded and wont start. I took off the air filter hose that connects the can to the carb and it had a lot of gas in the hose. I took the carb off and checked the needle and float. Seems fine! did a vacuum test and it checks out. I replaced it anyway with the second new carb and it too just pours gas out the throttle body into the airbox hose (accept the air box hose is removed for viewing) I also tested the float and needle valve and it too checks out. I replaced all the fuel lines, new gas cap, new fuel pump too. It still pours gas out. After replacing all of the above items the cart ran pretty darn good although it was running rich as it was smoking out of the exhaust pretty bad. I parked the cart and it sat for two days while I went online to figure out how to adjust the one and only adjustment screw to see if I could get the smoke cleared up. When I went to start the cart two days later It wouldn't start. I checked spark, all good. then I took the air filter off and discovered what I explained above, gas in the air hose.

All the folks I've seen with the problem- most pro's reply with the needle valve float theory which to me seems like the culprit too but that all checks out fine. Why is gas just running out of the carb??? could it be the fuel pump? I did pull the new one off and then took it apart and it was fairly dirty. I had also cleaned out my fuel tank during my mini tune up/overhaul so thinking that some dirt may have wrecked the fuel pump? when I pulled off the fuel pump i turned over the engine and fuel poured out of the "surge hole" or whatever the compression hole is called? that runs the fuel pump. Next I took off the carb altogether and turned over the engine. it eventually ran like a champ burning off all the fuel that was in the case? I then sprayed starting fluid a few times in the hole where the carb should be and the cart would run like a champ! BTW - this motor was brand new a couple of years ago and has run really well prior to my mini make over.

I've read some posts about BBQing the exhaust which Im going to do this weekend but Im at a total loss, could this issue really be from a plugged exhaust?

The most likely thing that makes the most sense is the carb float and needle valve but they check out fine with the testing. The next thing that makes sense is the fuel pump could just be a chinese junky faulty thing? which is why I'm asking about all these different fuel pumps and the prices of them???

Am I missing something else because it seems so fishy that this suddenly started happening. Anyhow, thanks in advance for any insight to this issue.

Cheers,

Jim