3pg Engine Lost Compression, Rebuild or Buy Remanufactured?

[dmos73]

1990 EZGO Marathon with the 3pg engine, the golf cart was driven all summer without an air filter and now it has quit running and lost compression. Should I look at just rebuilding the top end, or is a remanufactured swap the way to go?

 

[HotRodCarts]

It would be a lot cheaper to rebuild your engine but that's a decision only you can make.

 

[Diode]

See if Nubs can rebuild it for you

 

[dmos73]

I'm all about being able to save the money. Just buy the top end kit off amazon? I don't see any valves in any of these kits? Do you know of a kit in particular that is more complete?

 

[HotRodCarts]

There is no intake or exhaust valves in a 2 stroke engine so all you need is the top end rebuild kit. I'd consider buying the kit from Golf Cart Tire Supply instead of Amazon.

 

[big mack]

I am in the process of doing a top end on a 89 marathon I have a .5mm over size piston rings and gaskets kit coming. I have a young man that bores the jug out for me. while you have the engine out good time to check the reed valve the peddles are not closing I have new ones coming. There's a short video on u tube that shows you how to check reed valves. I am putting a new fuel pump on it to even though it's working. The pump is mounted on the back of the motor in a place thats not so easy to get to. Good luck

 

[HotRodCarts]

It's also a good time to replace the crank seals.

 

[1YAMAGUY]

And while your at it ?

 

[dmos73]

So, I finally got around to the golf cart and I bought crank seals as well. I guess you need a puller to get the fan hub removed from the crank? Bolts that came with my harmonic balancer puller don't fit so I have to go to the hardware store to get the right bolts to fit the hub, assuming that my thoughts are correct.

 

[big mack]

I don't know what it's called but I use a puller you can use 3 bolts but only use 2 and I have had to buy bolts that would work. Harbor freight has the puller cheap but works.

 

[dmos73]

Ok, I got the hub off of the crank, what is the trick to getting the seal out, without damaging the crank shaft?

 

[toeknee]

I am wondering same thing is there a trick or tip on this?