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[JOHNNY SINGLES]

Yes, just enough wall thickness for 1/2 in but a 5/8in bsf or metric equivalent would take out less material.

[JOHNNY SINGLES]

5/8 bsw.oops

[Gwilly]

Badger, was just thinking if your motor has the three drain plugs in the casing, then the middle one which is the pickup for the pump and has a gauze filter on it will also drain the oil tank.
Albet not quite as fast obviously… My point being if its not yet convenient to fit helicoil then use a dowty seal on the drain and maybe a little ptfe on the thread to bulk it up a bit…
It doesn't need to be very tight to seal,as long as it is secure enough to see you through till winter maintenance/layup… Could stay like that permanent if it seals ok, just use the middle plug...

[badger man]

Hi all.

Thanks very much for all your suggestions, I will probably go with the helicoil job and try a piece of greasy rag up inside the hole and just be as careful as possible. many thanks again.

Bob.

[PeteF]

When you do a proper repair fit dowry washers then it won't happen again. Have read here; http://www.whfolk.co.uk/REOCHUMBER/Arti ... nplugs.htm

[JOHNNY SINGLES]

I always replace this with a double plug, one that is screwed in permanently, usually brass and a smaller one that is screwed into that, no more problems.

[Midge]

Easy to fix with the correct workshop manual!