1987 Marathon bogging down/rich exhaust

kg4ckr · 06-14-2020, 10:56 AM

Hello,

I have read through several threads in regards to this issue, however it never seems to be addressed. I have a 1987 EZGO Marathon and it runs ok when you first start it. Then after a couple of minutes it starts to bog down. You can get it moving again if you pull the choke, but it never clears up. You have to constantly work the choke to keep it running. It also has a very strong exhaust odor, like unburned fuel. I am running 128:1 mixture. I have replaced carb and fuel pump. What am I missing. Running without the muffler still produces the same results. Any help would be appreciated!

kg4ckr · 06-14-2020, 03:28 PM

Update: I jacked it up to run it and see what it would do, and there is an overwhelming smell of gas from the exhaust. Right before it dies, Fuel runs out of the float bowl overflow orifice. So, I think it is getting adequate fuel. Could this be the reed valves? Float issue??

cart around · 06-14-2020, 05:50 PM

Do a compression test.

slonomo · 06-14-2020, 07:06 PM

Sounds like the float is sticking. Fuel should not be flowing out of the carb/overflow. The float is supposed to stop the fuel flow when the bowl is full.

Take the carb off and clean it really good. Set the float to factory specs.

06-14-2020, 10:56 AM	#1
kg4ckr Not Yet Wild Join Date: May 2020 Posts: 2	1987 Marathon bogging down/rich exhaust Hello, I have read through several threads in regards to this issue, however it never seems to be addressed. I have a 1987 EZGO Marathon and it runs ok when you first start it. Then after a couple of minutes it starts to bog down. You can get it moving again if you pull the choke, but it never clears up. You have to constantly work the choke to keep it running. It also has a very strong exhaust odor, like unburned fuel. I am running 128:1 mixture. I have replaced carb and fuel pump. What am I missing. Running without the muffler still produces the same results. Any help would be appreciated!
kg4ckr Not Yet Wild Join Date: May 2020 Posts: 2

06-14-2020, 03:28 PM	#2
kg4ckr Not Yet Wild Join Date: May 2020 Posts: 2	Re: 1987 Marathon bogging down/rich exhaust Update: I jacked it up to run it and see what it would do, and there is an overwhelming smell of gas from the exhaust. Right before it dies, Fuel runs out of the float bowl overflow orifice. So, I think it is getting adequate fuel. Could this be the reed valves? Float issue??
kg4ckr Not Yet Wild Join Date: May 2020 Posts: 2

06-14-2020, 05:50 PM	#3
cart around Test before replacing Join Date: Aug 2013 Location: Ohio side of the Pennsylvania border. Posts: 3,495	Re: 1987 Marathon bogging down/rich exhaust Do a compression test.

06-14-2020, 07:06 PM	#4
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,441	Re: 1987 Marathon bogging down/rich exhaust Sounds like the float is sticking. Fuel should not be flowing out of the carb/overflow. The float is supposed to stop the fuel flow when the bowl is full. Take the carb off and clean it really good. Set the float to factory specs.

Similar Threads
Thread	Forum
1987 ezgo marathon bogging down	Gas EZGO
G14 gas smoking out exhaust running rich	Gas Yamaha
marathon to txt swap exhaust question+marathon steering+snorkle	Clone Engine Swaps
1987 Club Car Gasser exhaust	Gas Club Car
1987 EZ GO Marathon	Gas EZGO

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum