Gas EZ-GO Won't Rev Up

JeffL · 05-18-2010, 06:33 PM

I am working on my father in laws ez go golf cart. The other day it just stopped running properly. I replaced the worn out starter/generator belt, cleaned the carb (which seemed fine), and put a new spark plug in it (which has good strong spark). I have the rear wheels up in the air, and when I try to get it to run, it starts but won't rev up. The throttle and everything is working properly, opening the butterfly and functioning as it should. He did mention it was very low on oil (which he filled when he noticed) right before this happened. It seems to have good compression (testing this by holding my finger over spark plug hole), and I did bleed out the oil to the pump. I also tried removing the drive belt to see if it would start without it on, and it does the same thing, starts and runs alittle higher than idle, but won't rev up. The cart is an older 4 wheel ez go 2 stroke golf cart, but I can't find any tags on it to get the exact year. Anyone have any ideas as to what may be causing this? The gas should be good as he says it is fresh. All information and ideas will be greatly appreciated. Thanks

madoc1 · 05-18-2010, 07:00 PM

your finger over the hole compression check is worthless. need a good gauge. they pretty inexpensive. does your engine stand up or does it lay down? if you are still using the oil pump and it ran out of oil just a little bit , you are in trouble. this why most switch to premix. luck jim

look in the glove box on the right side. the mfg.# will tell you the year.

they started being upright in 89 i think.

berthasquare · 05-18-2010, 07:20 PM

There is a difference between simply cranking vs. running. (Many mistakenly think that the engine is already running when in fact it simply is the sound of a cranking engine).

Now if the motor is truly running, it's possible that the cable from the governor side to the carb is broken/cut. When stepping on the gas pedal, check accelerator cable connections by ascertaining that the carb's butterfly is also opening.

JeffL · 05-18-2010, 07:47 PM

I will get a compression tester and test the compression. The engine is horizontal, and now that I know where to find the #'s I will get them. The motor is definately running. It cranks and fires, but will not rev. The throttle is working properly, as I have the seat off while running, and I am running the carb butterfly by hand. It just wo't rev up. Any other ideas?

rib33024 · 05-18-2010, 07:52 PM

WARNING

Take the pipe loose and crank it for a second DO NOT RUN IT LONG-just for a second and see what it does the pipe might me cloged---DO NOT RUN IT FOR MORE THAN A SECOND OR TOO

BGW...or... anyone on this forum, ... BGW itself, is/are NOT responsible for your actions in the result of using, or, misusing this information that may cause possible damage to yourself, your property, or someone else!

BigBlockMan · 05-18-2010, 08:01 PM

Oppps missed it was a 2 stroke. Check for a plugged muffler. Loosen the bolts at the connection joint so it can leak.

JeffL · 05-18-2010, 08:15 PM

I felt the exhaust as it was idling/cranking, and it seemed to be coming out good, but I will check better tomorrow. What should the compression be? Any other ideas? Thanks

madoc1 · 05-18-2010, 08:18 PM

no valves on a two stroke BBM.

JeffL · 05-19-2010, 09:25 PM

Hey guys, I loosened up the bolts between the muffler and the pipe and there it went, reved right up. I cut the bottom of the muffler off and it had about a cup of water in it and a inch and a half of crap. It also had some broken piece in it that I removed along with one of the baffles and then I welded the bottom back on. It might be alittle louder now, but it will definately flow. I will be putting the muffler back on tomorrow, and I hope it is back to normal. Thanks for all your help, glad I found this sight.

JeffL · 05-20-2010, 07:19 PM

Hey guys, so much for that. I cut the muffler open and cleaned out all the blockage and welded it back together, and it is definatley flowing good. When I put it back on the cart still wont run with it on. Compression is 90psi. Does this mean it needs piston and rings? Is this to low of a #? Also if I am going to rebuild it, should I buy the kit with the new jug, piston, rings ,etc? Where is a good place to buy a rebuild kit? Any other info on doing a rebuild would be appreciated. Thanks

05-18-2010, 06:33 PM	#1
JeffL Not Yet Wild Join Date: May 2010 Posts: 21	Gas EZ-GO Won't Rev Up I am working on my father in laws ez go golf cart. The other day it just stopped running properly. I replaced the worn out starter/generator belt, cleaned the carb (which seemed fine), and put a new spark plug in it (which has good strong spark). I have the rear wheels up in the air, and when I try to get it to run, it starts but won't rev up. The throttle and everything is working properly, opening the butterfly and functioning as it should. He did mention it was very low on oil (which he filled when he noticed) right before this happened. It seems to have good compression (testing this by holding my finger over spark plug hole), and I did bleed out the oil to the pump. I also tried removing the drive belt to see if it would start without it on, and it does the same thing, starts and runs alittle higher than idle, but won't rev up. The cart is an older 4 wheel ez go 2 stroke golf cart, but I can't find any tags on it to get the exact year. Anyone have any ideas as to what may be causing this? The gas should be good as he says it is fresh. All information and ideas will be greatly appreciated. Thanks
JeffL Not Yet Wild Join Date: May 2010 Posts: 21

05-18-2010, 07:00 PM	#2
madoc1 no clue Join Date: Sep 2009 Location: spicewood, texas Posts: 3,308	Re: Gas EZ-GO Won't Rev Up your finger over the hole compression check is worthless. need a good gauge. they pretty inexpensive. does your engine stand up or does it lay down? if you are still using the oil pump and it ran out of oil just a little bit , you are in trouble. this why most switch to premix. luck jim look in the glove box on the right side. the mfg.# will tell you the year. they started being upright in 89 i think.

05-18-2010, 07:20 PM	#3
berthasquare Getting Wild Join Date: Apr 2010 Location: los angeles Posts: 126	Re: Gas EZ-GO Won't Rev Up There is a difference between simply cranking vs. running. (Many mistakenly think that the engine is already running when in fact it simply is the sound of a cranking engine). Now if the motor is truly running, it's possible that the cable from the governor side to the carb is broken/cut. When stepping on the gas pedal, check accelerator cable connections by ascertaining that the carb's butterfly is also opening.

05-18-2010, 07:47 PM	#4
JeffL Not Yet Wild Join Date: May 2010 Posts: 21	Re: Gas EZ-GO Won't Rev Up I will get a compression tester and test the compression. The engine is horizontal, and now that I know where to find the #'s I will get them. The motor is definately running. It cranks and fires, but will not rev. The throttle is working properly, as I have the seat off while running, and I am running the carb butterfly by hand. It just wo't rev up. Any other ideas?
JeffL Not Yet Wild Join Date: May 2010 Posts: 21

05-18-2010, 07:52 PM	#5
rib33024 ...................... Join Date: Apr 2009 Location: FT Lauderdale FL. Posts: 16,416	Re: Gas EZ-GO Won't Rev Up WARNING Take the pipe loose and crank it for a second DO NOT RUN IT LONG-just for a second and see what it does the pipe might me cloged---DO NOT RUN IT FOR MORE THAN A SECOND OR TOO BGW...or... anyone on this forum, ... BGW itself, is/are NOT responsible for your actions in the result of using, or, misusing this information that may cause possible damage to yourself, your property, or someone else!

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05-18-2010, 08:01 PM	#6
BigBlockMan Gone Wild Join Date: Feb 2007 Location: Southwest Georgia Posts: 1,469	Re: Gas EZ-GO Won't Rev Up Oppps missed it was a 2 stroke. Check for a plugged muffler. Loosen the bolts at the connection joint so it can leak.

05-18-2010, 08:15 PM	#7
JeffL Not Yet Wild Join Date: May 2010 Posts: 21	Re: Gas EZ-GO Won't Rev Up I felt the exhaust as it was idling/cranking, and it seemed to be coming out good, but I will check better tomorrow. What should the compression be? Any other ideas? Thanks
JeffL Not Yet Wild Join Date: May 2010 Posts: 21

05-18-2010, 08:18 PM	#8
madoc1 no clue Join Date: Sep 2009 Location: spicewood, texas Posts: 3,308	Re: Gas EZ-GO Won't Rev Up no valves on a two stroke BBM.

05-19-2010, 09:25 PM	#9
JeffL Not Yet Wild Join Date: May 2010 Posts: 21	Re: Gas EZ-GO Won't Rev Up Hey guys, I loosened up the bolts between the muffler and the pipe and there it went, reved right up. I cut the bottom of the muffler off and it had about a cup of water in it and a inch and a half of crap. It also had some broken piece in it that I removed along with one of the baffles and then I welded the bottom back on. It might be alittle louder now, but it will definately flow. I will be putting the muffler back on tomorrow, and I hope it is back to normal. Thanks for all your help, glad I found this sight.
JeffL Not Yet Wild Join Date: May 2010 Posts: 21

05-20-2010, 07:19 PM	#10
JeffL Not Yet Wild Join Date: May 2010 Posts: 21	Re: Gas EZ-GO Won't Rev Up Hey guys, so much for that. I cut the muffler open and cleaned out all the blockage and welded it back together, and it is definatley flowing good. When I put it back on the cart still wont run with it on. Compression is 90psi. Does this mean it needs piston and rings? Is this to low of a #? Also if I am going to rebuild it, should I buy the kit with the new jug, piston, rings ,etc? Where is a good place to buy a rebuild kit? Any other info on doing a rebuild would be appreciated. Thanks
JeffL Not Yet Wild Join Date: May 2010 Posts: 21

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