Separating crank case on 1984 Ez-Go 2 stroke Robin engine.

[broakshores]

Hi. New guy here.

One of the two bolts that keeps the crankcase sealed as well as fastens the starter bracket to the engine broke. I bought the cart like this and want to fix it.

Additionally I think the crankshaft seal might be leaking so I want to replace that as well as anything else the good people here recommend while I have this thing torn down.

Right now I'm stuck. The 4 of 5 bolts with heads I can get to are out but I'm unable to separate the crankcase. I'm assuming only 1/2 of the case is threaded. Is there a trick?

Thanks for any help.

Mike.

[Dave Box]

Just to be sure, have you removed the cylinder, the clutch and the flywheel?

Dave

[broakshores]

Hi. Thanks for quick reply. Clutch was off. Cylinder was off. Flywheel NOT off. Looks old and brittle so didn't want to push my luck.

I got it separated about 3/4" which was enough to reach in with vice grips and twist out the broken bolt. After that I pressed it back together. Hopefully I haven't damaged it any more than it was. The folks that had this before me did not treat it well.

While putting the cylinder back on I broke one of the two compressions rings. :<

[Dave Box]

You said in your first post that you needed to change the crankshaft seal. There is also another one behind the flywheel. I would strenuously recommend that you change both as they will have had the same amount of wear. Removing the flywheel requires a two arm steering wheel puller and two long M6 bolts. If you decide to do it and need help, just shout out.

Dave

[panelbeatr]

When you install the front seal you might want to peen over the metal on the crankcase around the seal to keep it from popping out - I didn't and mine popped back out when it backfired :-(