lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas EZGO
Gas EZGO Gas EZGO Marathon, Medalist, TXT and RXV.



Post New Thread  Reply
 
Thread Tools Display Modes
Old 09-11-2014, 07:07 PM   #1
cart around
Test before replacing
E-Z-GO
 
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 2,956
Default The 2 stroke fuel pump

I have been a member for about a year, and have noticed that the same questions keep coming up. The most common problems are bad seals, dirty carburetor, ripped diaphragm in the fuel pump, and piston in backwards.

Since I just saw my old pump sitting there, I decided to take some pictures to show what is inside. Maybe someone will make this a sticky.

The fuel pump works on vacuum pulses from the engine, and must be airtight. The movement of the diaphragms move the fuel. The 2 check valves control where the fuel goes. A ripped upper diaphragm will result in weak or nonexistent fuel pressure. A ripped lower diaphragm will pull fuel into the crankcase, and cause a wet spark plug. You will think that you are getting fuel, and start looking for an ignition problem. Cleaning, or changing the plug will almost fix the problem for a few minutes driving you crazy. I believe that more than one unneeded HEI conversion has been performed because of a bad fuel pump.
Attached Images
File Type: jpg P1020211.jpg (65.8 KB, 0 views)
File Type: jpg P1020212.jpg (71.0 KB, 0 views)
File Type: jpg P1020213.jpg (85.1 KB, 0 views)
File Type: jpg P1020214.jpg (112.4 KB, 0 views)
File Type: jpg P1020215.jpg (113.3 KB, 0 views)
cart around is offline   Reply With Quote
Alt Today
BGW

Golf car forum 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
   
Old 09-11-2014, 07:09 PM   #2
cart around
Test before replacing
E-Z-GO
 
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 2,956
Default Re: The 2 stroke fuel pump

This last picture shows the ripped lower diaphragm. The cost of a rebuild kit was so close to the cost of a new pump, I opted to replace the entire pump.
Attached Images
File Type: jpg P1020216.jpg (100.7 KB, 0 views)
cart around is offline   Reply With Quote
Old 08-03-2015, 06:16 AM   #3
Stone
Getting Wild
 
Join Date: Jul 2015
Posts: 120
Default Re: The 2 stroke fuel pump

Quote:
Originally Posted by cart around View Post
This last picture shows the ripped lower diaphragm. The cost of a rebuild kit was so close to the cost of a new pump, I opted to replace the entire pump.
Curious? What should I expect to pay for a new pump?
Stone is offline   Reply With Quote
Old 08-03-2015, 06:54 AM   #4
kgsc
Gone Wild
 
kgsc's Avatar
Mixed Breed
 
Join Date: Dec 2009
Location: Aiken, SC
Posts: 9,353
Default Re: The 2 stroke fuel pump

And second question, will a four stroke pump work?
kgsc is offline   Reply With Quote
Old 08-03-2015, 07:33 AM   #5
cart around
Test before replacing
E-Z-GO
 
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 2,956
Default Re: The 2 stroke fuel pump

This should answer both questions. http://www.golfcartking.com/SearchRe...l+pump&Submit=
cart around is offline   Reply With Quote
Old 08-03-2015, 08:02 AM   #6
Stone
Getting Wild
 
Join Date: Jul 2015
Posts: 120
Default Re: The 2 stroke fuel pump

Quote:
Originally Posted by cart around View Post
Thanks
Stone is offline   Reply With Quote
Old 08-03-2015, 09:40 AM   #7
Stone
Getting Wild
 
Join Date: Jul 2015
Posts: 120
Default Re: The 2 stroke fuel pump

Quote:
Originally Posted by cart around View Post
I have been a member for about a year, and have noticed that the same questions keep coming up. The most common problems are bad seals, dirty carburetor, ripped diaphragm in the fuel pump, and piston in backwards.

Since I just saw my old pump sitting there, I decided to take some pictures to show what is inside. Maybe someone will make this a sticky.

The fuel pump works on vacuum pulses from the engine, and must be airtight. The movement of the diaphragms move the fuel. The 2 check valves control where the fuel goes. A ripped upper diaphragm will result in weak or nonexistent fuel pressure. A ripped lower diaphragm will pull fuel into the crankcase, and cause a wet spark plug. You will think that you are getting fuel, and start looking for an ignition problem. Cleaning, or changing the plug will almost fix the problem for a few minutes driving you crazy. I believe that more than one unneeded HEI conversion has been performed because of a bad fuel pump.
Fuel in the crankcase is a problem I have seen in other things like snowmobiles, etc. Is there any simple fix better than pulling the plug and assisting in evaporation?
Stone is offline   Reply With Quote
Old 08-03-2015, 10:03 AM   #8
kgsc
Gone Wild
 
kgsc's Avatar
Mixed Breed
 
Join Date: Dec 2009
Location: Aiken, SC
Posts: 9,353
Default Re: The 2 stroke fuel pump

Quote:
Originally Posted by cart around View Post
I know they make like 50 different pumps but I think they may be just different frames.. I have a Briggs fuel pump on my Robbins and it works fine. That $20 was better than the $50 for factory. Not saying it's right but it works.
kgsc is offline   Reply With Quote
Old 08-03-2015, 05:59 PM   #9
Stone
Getting Wild
 
Join Date: Jul 2015
Posts: 120
Default Re: The 2 stroke fuel pump

What is the best way to get fuel out of the crankcase? My lower diaphragm is bad and while I wait to get the new kit I want to clean out the fuel in the bottom.
Stone is offline   Reply With Quote
Old 08-03-2015, 06:05 PM   #10
cart around
Test before replacing
E-Z-GO
 
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 2,956
Default Re: The 2 stroke fuel pump

Stone,
There is no drain hole, so I would say pull the plug, and spin it like crazy.

Another option would be to pull the plug, and blow some compressed air into the fuel pump hole. If you decide to do that, make sure you don't build up any pressure that would blow out your seals.

Also remember that there probably isn't that much in there.
cart around is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas EZGO


Thread Tools
Display Modes


Similar Threads
Thread Forum
1988 Parcar Fuel pump Or no Fuel pump? Gas Columbia ParCar
G1 2 stroke fuel pump removal Gas Yamaha
g1 new fuel pump still wont pump HELP Gas Yamaha
2 stroke fuel pump Gas EZGO
i need a fuel pump for an 84 ez go 2 stroke and more probably... Gas EZGO


All times are GMT -5. The time now is 03:58 PM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, 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.