93 marathon won't move

J

joejad

New Member
Im in dire need of help. I went to move my cart & it won't move. If I put the shifter in neutral the motor revs to full speed fine. When I put it in gear to go it hardly moves at all. I jacked ot up & put it in both gears and it moves fine. Both the drive & driven clutches are moving when I rev it up. still nada. The other thing is when I try to move it in gear it doesn't seem to get to the full rpm like when it's jacked up.
I'm lost here, or I'm not seeing a obvious issue. I would appreciate any help.
 
Nubs

Nubs

Cartaholic - V.I.P.
Welcome
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if i understand ya right, my first guess would be a striped rear hub/brake drum, or are you saying that it just has no power? if so i would say the valves need adjusting.
 
J

joejad

New Member
Nubs, it just has no power. I recently did a valve job & set the valves at .04 cold. Also I just put new brakes on, and a new fuel pump on the cart. It was running pretty good, but now it just hardly moves. I was wondering if it could be a clutch problem, but like I said both drive & driven move freely when I jack it up & run it.
 
B

bigdog29609

New Member
We just had an old 2-cycle Marathon in our shop with the same problem. We found the cart had almost NO compression. Ran great until you put the wheels on the ground.
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J

joejad

New Member
Bigdog, that's what I'm leaning to now. I did a compression test and the cyls were 120 & 150, and I am pushing some smoke. The thing that baffles me though is me & my daughter were both driving it around for the last few weeks & all of a sudden nada. I think I know what one big problem is, I got this cart for my daughter a few weeks ago & she had me paint it John Deere green, and I worked for CAT for 4 years
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THAT DREADED GREEN.
I'm going to check the brake drum this weekend for stripping, I really doubt the clutch just went bad especially with both clutches moving so good. SO I guess I ring it & hope that fixes it, if not I at least get to cross it off the list.
 
HotRodCarts

HotRodCarts

Cartaholic
Just to be sure re-check the valve lash like Nubs mentioned. With a fresh valve job things can change after running the engine.
 
J

joejad

New Member
Yep I'm going to check the valves too.
I really appreciate all the feed back guys. I never worked on a gas cart till now so I can use any help I can get thank's a bunch.
 
Nubs

Nubs

Cartaholic - V.I.P.
Did you install new intake valves, its very common for the intakes to suck up into the head on those engines.
 
J

joejad

New Member
Yep, that's why I did the valves, because I had to put new intakes in. I've never seen valves go up in a head like that. I'm going to order parts tomorrow for a ring job. Right now here in South Carolina it's clod as heck, so it will be a few days before I play around with it. I did go out in the shop yesterday and started it. I took the oil fill cap off when I had it running & it was pushing quite a bit of smoke, so I have to believe it needs the rings pretty bad.
 
K

kogieblack

New Member
So what was it? Stripped splines? Or dragging brakes. Or valve problem. You cannot have more than 10% difference in compression between the two cylinders. So if 1 is 150, the other should be within 135-165. Best is they should be the same or almost the same.
 
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