Chainsaw Repair

I tried to find a picture but I have no idea where they went .Any way it goes like this .

The reed valve Macs area all built about the same way .Carb on top of a reed valve so no actual intake port expect the manifold which holds the reeds .Transfers top and bottom ,exhaust out the side ,horizontal engine .Bottom transfers are bottom tunneled ,three ports ,top kind of open three ports ,non windowed piston .Bottom tranfers are plugged with welch plugs .

The sleeve or liner only extents to below the bottom transfer tunnel .Leaving the welch plugs out all the ports can be cut right through the old ports left in the block and of course reinstalling the plugs once that's complete .The trick is chamfering the dang things without a right angle die grinder which I don't own .

Because the liner is cast iron they can be ground using a long shank tool .However working with a mirror every thing is backwards with regard to movement of the die grinder .It's not that difficult just tedious but then again any port work is tedious no matter what engine it is .If you aren't in the mood what until you are .Lotta work there to screw it up with a temper tantrum .