Liquid metal,,(whatever its called)

Lincs Lass

Member
Location
north lincs
I been given an old chainsaw and a couple of the threaded screw holes that hold the plastic covers on have had the threads striped out ,,cant rethread them as the casting hasnt got enough metal to do so .
Would epoxy liquid metal set hard enough to redrill and rethread ,,its a magnesium case
 

Ley253

Member
Location
Bath
That I dont know, but an engineering shop should. Also the holes perhaps could be tig welded and rethreaded. As they only hold plastic, a quality epoxy metal should be fine, just make sure its all clean before adding the stuff.
 

Lincs Lass

Member
Location
north lincs
Think I might take it to my husky dealer and get their opinion ,,not enough metal to drill out to get a helicoil in ,,its why I thought of the liquid fill stuff
 

Ukjay

Member
Think I might take it to my husky dealer and get their opinion ,,not enough metal to drill out to get a helicoil in ,,its why I thought of the liquid fill stuff
Yes, you will need enough to allow a 4.2mm drill, then have enough structural integrity to tap out the hole ready for the insert.

If the guards are not safety related - you could mix this putty, then ram it in the hole, drill it and tap the hole to suit your 4mm thread:

https://www.halfords.com/motoring/paints-body-repair/adhesives/evo-stik-hard-fast-metal-epoxy-putty?request_type=bestseller
 

Lincs Lass

Member
Location
north lincs
Yes, you will need enough to allow a 4.2mm drill, then have enough structural integrity to tap out the hole ready for the insert.

If the guards are not safety related - you could mix this putty, then ram it in the hole, drill it and tap the hole to suit your 4mm thread:

https://www.halfords.com/motoring/paints-body-repair/adhesives/evo-stik-hard-fast-metal-epoxy-putty?request_type=bestseller
That looks like the stuff ,,its only to hold the top plastic cover over the head and carburetor
 

ACEngineering

Member
Location
Oxon
That looks like the stuff ,,its only to hold the top plastic cover over the head and carburetor
can you not use a self tapping screw???

otherwise this stuff is very good, bit thick though but if you can warm the hole up this thick paste turns runny so would be ideal to run in and let the air pockets out filling it nicely. once set for 24 hours its rock hard so should be able to drill and re thread it.

https://www.ebay.co.uk/itm/Genuine-Wurth-Liquid-Metal-FE-1-Fast-Acting-Metal-Repair-System-500g/263824701714?hash=item3d6d2d7912:g:5eMAAOSw1CRbUGzi
 

Lincs Lass

Member
Location
north lincs
can you not use a self tapping screw???

otherwise this stuff is very good, bit thick though but if you can warm the hole up this thick paste turns runny so would be ideal to run in and let the air pockets out filling it nicely. once set for 24 hours its rock hard so should be able to drill and re thread it.

https://www.ebay.co.uk/itm/Genuine-Wurth-Liquid-Metal-FE-1-Fast-Acting-Metal-Repair-System-500g/263824701714?hash=item3d6d2d7912:g:5eMAAOSw1CRbUGzi
sometime in its life ,some muppet lost the original screws and put in a self tappers ,except the ones they used did more damage ,,trying to get the holes back to the original size
 

Mursal

Member
And you haven't any original threads down at the very bottom of the hole where they couldn't damage them with the self tapper? If so, 4mm fully threaded set screws and then tighten the nut?
 
Last edited:

Mursal

Member
If you run a nut up on one slightly too long, tighten it to the bottom of the hole (be careful not to break out the casing) then tighten the nut on the cover.

 

bobk

Member
Location
stafford
I been given an old chainsaw and a couple of the threaded screw holes that hold the plastic covers on have had the threads striped out ,,cant rethread them as the casting hasnt got enough metal to do so .
Would epoxy liquid metal set hard enough to redrill and rethread ,,its a magnesium case
Chuck it in the bin , nobody gives a good chainsaw away.
 

Lincs Lass

Member
Location
north lincs
If you run a nut up on one slightly too long, tighten it to the bottom of the hole (be careful not to break out the casing) then tighten the nut on the cover.

Are ,see now what you ment ,,it wont work as the cover has to fit slightly behind the flywheel cover and under the chain brake handle ,,its a tight fit as it is without trying to get it over something stuck up ,,filling the holes and tapping them out is the only option
 

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