Corrosion Hole in Crankcase

[Rocosil]

Next chapter in my 031 repair saga. (Won't idle & won't restart when hot) The corrosion on the clutch side of the crankcase is worse than I expected - one 3/16" hole and another longer but narrower spot that is just about to give way. I guess that pretty much accounts for the problems I'm having with this old-timer.

I read Lakeside's incredible thread about repairs with JB Weld. What I'm not quite sure of is whether that sort of repair can be made on the crankcase itself. Can it? I've built several boats, so I'm used to working with epoxy, even for building fuel and water tanks. I'm just not sure how it stands up to the heat, pressure, and vibration you get with chainsaws.
Bob

 

[PES+]

Yup.....it works pretty well.....just clean clean clean.....then clean it.....then clean it some more.....THEN epoxy the hole it helps if you roughen the magnesium a bit with files too......tooth for the plug

 

[PES+]

Better to post some pics so people can see if it is worth attempting though.....the description reads like a weak bearing mount possiblity

 

[mattinky]

If it were me I'd try to find a good used crankcase, 031 parts are pretty easy to find... but that's just me, I would always worry about the repair holding. It might cost a little more to replace it but if it did'nt hold and you got an air leak you might be looking at a disaster. Just my $.02

 

[PES+]

Maybe slap on some glue and see if it needs anything else before you go to the trouble of changing the cases.

Good learning experience though

 

[Rocosil]

Better to post some pics so people can see if it is worth attempting though.....the description reads like a weak bearing mount possiblity

OK, here is an attempt to post a pic. I drive a Mac, so the instructions I found here for PCs don't quite penetrate my thick skull.

 

[Lakeside53]

If I'm seeing it correctly... That's just cosmetic - degrease, slap some JB on it - it will be fine...


The hot restart issue is likley not related to your crankcase corrosion.

 

[PES+]

Now there's a market


I am a genius

Custom color matched epoxy.....in Stihl gray Husky Orange and Jonsered red.

We all know those Dolmars never get holes in them

 

[PES+]

The new Solo cases are already a match