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Gas EZGO Gas EZGO Marathon, Medalist, TXT and RXV. |
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09-21-2015, 10:49 AM | #1 |
Not Yet Wild
Join Date: Sep 2015
Posts: 21
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Diagram labels from 86 ezgo?
Hi Forums!! This is my first post so i am sorry if i post it in the wrong forum haha. I am super green to the cart world and was wondering if there was a spot with information on engine basics and diagrams. My cart runs but backfires. I think the previous owner (grandpa RIP) disabled the governor ?? Not sure if that has something to do with it. Here is a picture of the throttle / carb area ? What am i looking at ?? When i push the gas pedal only one cable moves but isnt attached to anything. It just slides through the hole. Top right cable'. Any help is greatly appreciated
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09-21-2015, 03:16 PM | #2 |
Gone Wild
Join Date: Jul 2015
Location: Metro Detroit
Posts: 449
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Re: Diagram labels from 86 ezgo?
OK, governor being disconnected will not make it backfire.
So far as the throttle goes, the carb is opened by spring pressure, and the gas pedal CLOSES the throttle, the exact opposite of the way most things work. When you push your foot to the floor the throttle cable will lengthen allowing the spring to open the carb, when you take your foot off the gas, the throttle cable pulls the carb closed. You said it backfires, out the exhaust I assume? It could be lean. If it is lean, it may not fire, will dump that raw gas and air into the exhaust, then when it does fire, and exhausts the still burning mixture into the exhaust, there is finds the unburned fuel and air, and POP! Probably the smart thing to do, if it has been sitting a long time, would be to pull the motor out, replace the seals and gaskets, and get a carb kit and clean the carb and go through it so you know all that is right. Of course, if you have never rebuilt a carb you may want someone who has done it successfully before, so you do not create a new problem while trying to solve an existing one. I needed a carb kit and found a whole new carb on ebay for $30. I saved the OEM carb, and put that $30 carb on and my cart runs fine. Tom (who typically does not like cheap parts but was stuck and it worked, THIS time!) |
09-21-2015, 03:18 PM | #3 |
Gone Wild
Join Date: Jul 2015
Location: Metro Detroit
Posts: 449
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Re: Diagram labels from 86 ezgo?
Looking at your pic again, the throttle is in the wide open position right now, looks like the governor is connected and the throttle cable is not.
Tom |
09-21-2015, 04:53 PM | #4 |
Test before replacing
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,489
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Re: Diagram labels from 86 ezgo?
One of your governor cables is connected. The other cable is not. Get rid of them both.
Your throttle cable is supposed to slide through like that. The throttle opens itself with a spring. The reason it is backfiring is because another spring is missing from the throttle cable. Take the spring from an ink pen, and slide it over the cable. You then secure it in place with the metal ferrule that is there. The spring holds the throttle closed just long enough for the microswitch to make contact when you step on the pedal. It also makes sure that the throttle plate closes all the way when you let your foot off the gas. If you allow it to continue backfiring, it will blow out the seals. |
09-21-2015, 05:04 PM | #5 | |
Gone Wild
Join Date: Jul 2015
Location: Metro Detroit
Posts: 449
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Re: Diagram labels from 86 ezgo?
Quote:
The spring on the throttle cable is the way to go, allows the throttle to close completely without damaging the carb, and the other reasons you mentioned. Tom |
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09-21-2015, 06:18 PM | #6 |
Not Yet Wild
Join Date: Sep 2015
Posts: 21
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Re: Diagram labels from 86 ezgo?
WOW. What Great responses. This forum is going to be so useful and i am so thankful for the quick responses.
Used 2 pen springs and made it pretty tight. Removed the governor line and disconnected the choke for now ( it is frayed and thought it might be restricting the snap back. When going from full throttle to coast back to full throttle it still back fires. Not as much but i am worried when you say it is going to blow seals. Yikes. I backed off on what i think is the butterfly stop to make sure it butts up tight to stop the fuel( something to do with that micro switch right ??) The oil injector is disconnected and already had mixed fuel in tank. Oh! With the springs now installed the acceleration is much slower. I am assuming that was supposed to happen. Again. Thanks so much for the help The motor was apparently just rebuilt so i am assuming the carb was cleaned and resealed. |
09-21-2015, 06:51 PM | #7 |
Gone Wild
Join Date: Jul 2015
Location: Metro Detroit
Posts: 449
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Re: Diagram labels from 86 ezgo?
The 2 springs on the throttle cable may be a bit much. Remember, it closes the throttle, and if you have too much spring on it, it will not allow the throttle to open all the way.
Also, don't assume an engine rebuild would include a carb rebuild or even cleaning. In my shop, a carb rebuild would be an add on, just like a rebuilt engine does not mean the generator was rebuilt. The throttle blade needs to close all the way to cut off the air flow. Once the air flow is shut off, the fuel will be also as it needs to air's velocity to make the pressure differential that pushes the fuel into the engine. Just pissing in the dark here, but for your back fire I would be looking at the carb, making sure the throttle blade closes 100%, and working the way it is supposed to. Foot to floor should be wide open, foot off gas, 100% closed, and I am sure there is some fine tuning to have the micro switch work at what ever throttle opening, others could help you with that. Tom |
09-21-2015, 07:06 PM | #8 |
Test before replacing
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,489
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Re: Diagram labels from 86 ezgo?
Your oil injection banjo should be removed, and the intake should plugged airtight with a 6mm screw.
I was concerned there for a moment that you had disconnected the oil cable without premixing because of my identification mistake. I believe that 2 pen springs are too much. The choke is a different lever on the side of the carburetor, and I do not see it hooked up in your original picture. Look at mine again. |
09-21-2015, 07:54 PM | #9 |
Test before replacing
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,489
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Re: Diagram labels from 86 ezgo?
I'm on my way to work. Look through this manual. it is the same as yours.
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09-21-2015, 09:22 PM | #10 | |
Gone Wild
Join Date: Jul 2015
Location: Metro Detroit
Posts: 449
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Re: Diagram labels from 86 ezgo?
Quote:
Tom |
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