Please help with figuring out what I need(engine and drivetrain)

[schwim]

Hi there everyone!

I've recently picked up a Murray cart (model: gt60504x92a) and a box of parts making up not enough engine. I've decided to purchase a new engine and it looks like I'm going to need to figure out what torque converter I need. Here's some pics of what it's got now:

The engines seem pretty straight forward, horizontal shaft, 3/4" diameter seems to be the norm and I've seen tons of discussion on inexpensive predators and tillitsons but I'm at somewhat of a loss as to the most inexpensive way to get power to the axle. The current setup seems to be a Comet torque convertor though a very old style. Could someone point me in the direction of what I should buy to get power to that pulley on the axle? Do I also need to change that pulley as well or can I just buy the half that mounts to the shaft of the engine?


For the torque convertor, I'm finding this: Amazon Link



For the engine, we're considering this: Amazon Link


Any help would be greatly appreciated. Thanks for your time!

 

[itsid]

any gx200 (or clone) will do just nicely..

the TC is a series 30 comet (in very bad shape)
(a clone off ebay [usually much cheaper than amazon])
will seve you well, even if you buy one with a backplate (a so called TaV2 Kit)
you can pop off the pulleys from the backplate and use them on the kart as you should.
but keep the original comet and try to restore it.
original spare parts can be bought on mfgsupply.com in case you want to,
clone parts will work as a replacement too if you so desire.
but for a quick and cheap fix.. an ebay clone as a replacement is the way to go.

Only difference: you'll also need a different belt..
unfortunately murray have been dorks and refused to put any useable information in their part diagrams (no toothcounts for sprockets, no comet order number for the belt no nothing but their own order numbers.... idiots!)
So you have to measure the center to center distance between the two pulleys.
and order a matching belt according to that center to center distance.
https://www.gokartsupply.com/tcbelts.htm is your friend here

'sid

PS you sure it's the gt60504x92A not the gt60501x92A?

 

[schwim]

Thanks so much for your help itsid!

Those links are going to be invaluable as I'd love to retain the existing drivetrain setup. The only type of rebuild info I can find on this particular cart is a redbeard YT video and he cut the entire thing off, installed a new axle to flip the sprocket over and used a packaged clutch kit. I am looking to save money where possible, so reusing the current setup is the direction we're hoping to go. I'm trying to find a legible schematic of this setup so I can see what exactly I'm missing. I haven't yet figured out which parts I have go where, so it doesn't make enough sense to me to know what I need to purchase. If I can't make sense of it, I'll post some pics to see if I can't get the collective to sort me out on it.

PS you sure it's the gt60504x92A not the gt60501x92A?

If this sticker is to be believed, yes. I can't find a manual or parts breakdown for it online, however. Just the parts explosion for the 1x92d. Would you happen to know the difference between the various x models?

 

[itsid]

I got a 01x92a pdf here..
(attached below)

but it's not very usefull I'm afraid

To me that looks very much alike yours, that's why I asked..
anyways, no, I'm afraid I don't know the differences tbh;
I'm fairly certain I could find out given enough time spend researching

Well, yes and no, ich you look for the kart model you won't find much restoration videos at all.
BUT since that TC and engine are off the shelf parts..
you can find very good and usefull information just looking for those

blaskovic made a very thorough Series 30 maintenance video explaining basically everything you need to know
(find it on DIYGK or youtube )

Grant (KartFab) made an exceptional video on the larger series 40
even showing a resotoration of a really ba dconditioned one.
same rules apply still worth watching.

you're very obviously missing the outer bell in the ic,
the weight pack and moveable sheave is still there, so is the clover hub, and the fixed sheave of course
(PO mounted it inside out to prevent the weights and hub from falling out...)
so IMHO all you really need appears to be the bell:
https://www.mfgsupply.com/gomini/go.../gominiclutchtorq30driveparts/219204a-w2.html

maybe the bronze bushing, maybe the pilot washer or such..

https://www.mfgsupply.com/gomini/go...lutchtorq30/gominiclutchtorq30driveparts.html
(scroll down for the exploded view)
but I also attach a series 30 manual.

talking of which, the washers changed over time,
essentially even the smaller 3/4" setup got the washers from the 1" bore version except for the bronze bushing (that's still needed)
IF your TC is before or after the change depends on the stem of the fixed sheave.
(the shorter one needs the two inner washers and has a flat pilot washer, the longer one doesn't and has the stepped pilot washer)
measure your's and let us know.

Now, I can't tell if everything is as it should from the pic you posted of course;
so if you want some assistance on visually checking the parts,
we need some more and most of all better pics.
especially important on the driven unit (the one that's on the jackshaft not the engine)
is if the spring is in good condition and all the rubber buttons are still present.
(sheaves can be cleaned, cam barely ever cracks)

'sid

 

[schwim]

Hello! I've got some photos in the hopes of finding out what exactly I need to look for. I think I have all the parts to the drivetrain but some parts may need replacement due to wear(like the brass bushing perhaps?). I'd love any input on what I should consider buying to get this setup working again. Do I need the engine before figuring out which belt I should buy? I don't have the old belt to go off of but I plan on using the same mounting setup.

Click for biggies:

















I think I've settled on this Predator 212 for the cart.

 

[itsid]

Well, hard to tell since everything is in lousy state atm.

clean everything up as good as you can, remove all rust and polish the sheaves baby smooth.

I'd replace all springs (the garters in the front [blue is the stock colour] and the driven spring as well [red, sometimes green])
check all rubber buttons
and if everything could be cleaned up nicely, there's nothing you need to replace,
badly pitted, or damaged parts will have to be replaced (as do missing parts of course )

So a set of garter springs, a driven spring, some dry lube [graphite spray lube]
and maybe a set of buttons is about all you really need,
apart from some basic cleaning sanding and polishing equipment and elbow grease that is.

Grant made an exceptional video for a series 40 about that very topic.
https://www.youtube.com/watch?v=a3FCcLlR-sg

it's a different Torque Converter, but the same rules apply.

'sid

 

[schwim]

We're going ahead with a Predatore 212 and will be cleaning everything up to see if we can't get it all back to good working order, thanks for both the info and links!

Can I ask how I would go about determining the length of belt I need? Do I need to wait for the engine to arrive to measure point to point of the axle/crankshaft or can I determine it in another manner?

 

[itsid]

center to center distance of both shafts (crank and jack) is enough,
that and knowing the diameter of the driven pulley allows you to just look up the correct belt in a table:
https://www.gokartsupply.com/tcbelts.htm (series 30 chart is the first)


'sid