OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines head stud replacement

Hi all,

As a project for my young lad I got him to rebuild a Victa 2 stroke I had laying aound. All went well until when taking out the one of the head studs it got stripped pretty badly. The nut is stuck solid and no no way will it unthread. I've searched around at getting another stud but no luck. Any leads on what is out there? The motor is a 160cc, full crank, don't think it's a powertorque, has a super start sticker on the cowl, stamped EN7 1935A. Model is a HT313 A1 Craftsman.

Cheers

Kev

Is it the nut itself that won't come off the stud?
I would try penetrant like WD 40 over night. I can't see how it could cross thread when it was already on.
Going by your SuperStart transfer, it is the last of the full cranks which has electronic ignition, just before the cheaper to produce Powertorque series.

Are you meaning the nut got rounded trying to undo it? Find a cheap socket one size smaller, preferably a six sided one, not the fine type, and hammer it on, will usually do the job if that is the problem. Otherwise post a picture of the problem and someone will be able to advise a course of action.

G'day MadGadget, and welcome to the ODK Forums.

That nut is probably just rust-bound to the stud. Are the visible stud threads still OK? If so, the following applies.

If you've got the stud out of the crankcase, the existing nut can be split, to get it off the stud. Then it's an easy job to clean up the stud thread.

The way I'd go about it, is to use a thin cutting disc in an angle grinder to cut grooves along two opposite faces of the nut hex, i.e. parallel to the stud.

Then place the nut/stud on a hard, solid surface - e.g. the side of a mash hammer, or an anvil. Set it up with one of the grooves upward, and use a cold chisel and hammer to split the nut.

Hi MadGadget do you have a picture of the one you need.As even for the full crank engine (if it's the one I'm thinking of)then there was 2 to 3 different styles of the stud and nut combo.So yes a pictures would be worth a thousand words.

Hi all, yes it's a full crank engine with electronic ignition. I actually didn't think of grinding/splitting off the nut, D'oh The visible threads are OK but the shaft is stuffed wich won't matter as eh ends are fine.

OK it would almost seem problem solved then.

Update us on how you go and a couple of pics would be good to learn from.