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Big Block Talk! Everything about swapping a big block engine into your cart! |
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03-07-2021, 01:52 AM | #1 |
Not Yet Wild
Join Date: Feb 2021
Posts: 14
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EZGO Elec. to Gas conversion "Scrappie" GX390.
Converting a old EZGO electric to gas, putting in a Honda GX390 engine. My biggest road block is how to mount the engine. It needs to move with the rear so how do I do that? I see some people weld a plate right to the rear end but mine is so small I don't see that working out well.
Can anyone tell me what year it is from this plate? |
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03-07-2021, 07:17 AM | #2 |
Gone Wild
Join Date: Jun 2011
Location: Northern Indiana
Posts: 2,823
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Re: EZGO Elec. to Gas conversion "Scrappie" GX390.
That would be a 1990 Marathon. There is no easy way to convert that. Gas version had the whole engine and rear end on a swinging frame that hinged at about where the front of your battery trays would be. Then there's also the need to swap to a 4 stroke gas rear end, or some other extreme measure, to have a reverse gear. Electrics and 2 strokes just turned the motor / engine backwards & a 4 stroke can't do that.
Last edited by meimk; 03-07-2021 at 07:18 AM.. Reason: typo |
03-07-2021, 09:26 AM | #3 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,436
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Re: EZGO Elec. to Gas conversion "Scrappie" GX390.
Not saying it can't be done, but that would be a pretty good challenge. Tons of work with a low payoff. You'd have to make it a "rigid" meaning, make the rear axle so that it doesn't move. Otherwise you'd have to fabricate a whole new swingarm that connects to the axle, holds the engine, and has a pivot point near the floor board area. Plus, you still have the issue of fabricating a drive system with chain. You will have a very low gear ratio, so 10 mph or so, and no reverse. You're better off finding a gas 4 cycle cart with no engine. Read this thread https://www.buggiesgonewild.com/showthread.php?t=172255 |
03-07-2021, 04:57 PM | #4 |
Not Yet Wild
Join Date: Feb 2021
Posts: 14
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Re: EZGO Elec. to Gas conversion "Scrappie" GX390.
The GX390 I have is from a pressure washer and already has a nice mounting plate even. I got most of the crap out of the back just need to find some decent angle to weld to the rear end.
I don't care if it goes fast as long as it goes. Its for "farm use", not really a farm but ya get the idea. Driver side brake cable is seized so if anyone can lead me a parts manual for my model I would appreciate it. |
03-08-2021, 10:06 PM | #5 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,436
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Re: EZGO Elec. to Gas conversion "Scrappie" GX390.
Does the engine have a straight shaft crank? or is it tapered?
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03-10-2021, 08:51 PM | #6 |
Not Yet Wild
Join Date: Feb 2021
Posts: 14
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Re: EZGO Elec. to Gas conversion "Scrappie" GX390.
Straight.
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conversion, ezgo, gx390 |
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