Loss of compression '75D

dwkamins

Wow, The cart was running fine over the holiday until it suddenly stopped running. Had a few back fires. Checked electric, linkage, gas flow. All seemed fine.
Pulled the spark plug and was dry. Not getting fuel. Borrowed a compression checker. 27 lb..

I'm thinking blown rings or head gasket. With the dry spark plug, I'm leaning toward the rings as the problem.

Looking for comments. Thanks Guys!

BGW

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

jericho

Not a pro just an observer.With the backfiring I would suspect timing or valves as a possibility.

dwkamins

checked the "Electric" was fine, Two strokes have no valves.

jericho

And this.........Is exactly why i generly try to keep my trap shut.

dwkamins

No problem. . . you just learned something and that is why this forum is great!!

jericho

Yep.I learn a little something here most days.

Lochlin

27 is WAY too low. Should be 90+ but the cart will run on a bit less.

You need a new top end my man. Rings, piston, head gasket at minimum. If you are going to do that work you may as well do the whole top.

73eldo

It does not take too long to burn these things up. They don't like to run 'wide open' for extended periods of time. They originally had a governor to keep that from happening.

dwkamins

I really don't race it around but I do have a hitch on the cart and was toting some fire wood back to my camp site in a small trailer. Perhaps that put too much of a strain on the small engine. The break down didn't happen while towing.
Now I am wondering if I can get new rings from and auto parts supplier. The only specs I have are from the Harley repair manual. Bore specs of 2.75 in. (68.9mm).

Lochlin

That cart is 40 years old. Blowing rings, head gaskets, pistons, etc. is to be expected.

I would stick with actual golf cart parts for replacement. Google "Harley Golf Cart Parts" and you'll find loads of suppliers that sell engine parts for these carts.

Just my 2 cents but I would spend a few extra bucks and get an entire rebuild kit that includes a new cylinder. That way everything is guaranteed to match bore-wise. Plus, who knows how that cart has been monkeyed with over the years. Replacing all of it is like pressing the reset button. That's just me though.

At least get a new piston if you are going to do the rings.