Chainsaw Repair

Those little stickers are NLA

maybe

Who put that funny looking pipe on your exhaust?    Maybe,  I will put one on mine like that.   

Plus I think the original is a bit restrictive.    I put pipes on alot of my saws.   It is usually one of the first mods I will do when I get a saw.   Heck I have even used an old shower curtain rod before.   

There's two different oil pump drives on these. The change point was Dec 96.

I only have the later one. On this one, there is a recess counter bore in the end of the clutch drum under the rim gear drive. This part of the clutch drum extends over a small spacer the diameter of the needle bearing so the drum can extend back to drive the nylon worm gear for the oil pump. You can see a corresponding recess in the plastic worm gear almost like an imprint of the end of the clutch drum showing the teeth of the hub.

There is another older clutch drum with no recess and there is a spacer and big finder washer between the oil pump worm gear and the clutch bell

This pdf image is from 2004. The top illustration is of the new 3 shoe clutch but in it you can see the new style worm gear drive that was used on all three clutches from December 96 on . . .

The bottom of the image shows the old style clutch drive.

The older system is a full time oil pump drive and the newer system only pumps oil when the clutch is engaged and the chain is turning. I've had several chainsaws with full time oil pumps and they are just fine and not noticeable unless you just let the chainsaw set there and idle a long time.

This has nothing to do with which style spider you are running.

I've got to work on the chain on my Dolmar a little. It is the old style Oregon semi chisel chain with the straight front rakers.

It's a old one that came in a box of chainsaw junk that someone had rocked. I filed it back enough that it should have cut good and took the rakers down some but it doesn't cut like I'm used to at all. It is just a semi chisel not a full chisel but there are a need for these sometimes.

I measured the raker height tonight and they are only down about .010" so I need to go over the teeth once again and then take the rakers down where they should be.