372xp won’t start.

[Craigb]

Hold that thought. The drum does have a degree of wobble to it. 

[Craigb]

And as I turn the crank with the starter cord the clutch and the pinion turn. This is with the drum off. Surely the pinion is too tight on the crank or the clutch is squashing and gripping it.

[spudulike]

There should be very little "in and out" movement. Sometimes, so little, it makes removing the circlip a big tight.

The drum should have minimal wobble on it if you place a finger on either side of the drum and push alternately.

[Craigb]

So. New clutch bearing, new coil and a new carb. Prior to that a case split and new bearings and seals. Gasket delete and we have 180 psi of comp. The cylinder wanted a hone as I had slightly elongated the cylinder getting scuffs and piston transfer off. Now it’s run in it has 185 psi of compression. I also gave it a muffler mod and now the saw runs superb. 

[Dan Maynard]

Good job, very rewarding.

 

1 hour ago, Craigb said:

I also gave it a muffler mod

MIG welded? Never tried but wondered how it would go.

[Craigb]

9 minutes ago, Dan Maynard said:

Good job, very rewarding.

 

MIG welded? Never tried but wondered how it would go.

As a coded welder by trade I’m quite ashamed to say no, it’s tig. The weld across the front is from where I cut the bumper off and it split when I drilled the holes. It was piss thin and needed building up from the edges in. Round the pipes is tig also but with silicon bronze wire usually used for oxy brazing, but as you can see it can be tigged. Definitely not my best work but it isn’t coked up inside the pipes and it definitely won’t fail when in use.

 

also I brazed the pipes on as the muffler is mild steel but the pipes are stainless. No cracking across the weld then.

Edited September 10, 2023 by Craigb

[Dan Maynard]

Ah makes sense, I have wondered about braze but only got MIG nowadays. Most important thing it won't fall off.

[Craigb]

4 minutes ago, Dan Maynard said:

Ah makes sense, I have wondered about braze but only got MIG nowadays. Most important thing it won't fall off.

It definitely won’t fall apart. You could mig them on by doing it slowly. Bzzzz stop bzzzz stop bzzzz stop etc. in effect putting tacks on tacks as you worked round the pipe.

Edited September 10, 2023 by Craigb

[Stubby]

2 hours ago, Craigb said:

So. New clutch bearing, new coil and a new carb. Prior to that a case split and new bearings and seals. Gasket delete and we have 180 psi of comp. The cylinder wanted a hone as I had slightly elongated the cylinder getting scuffs and piston transfer off. Now it’s run in it has 185 psi of compression. I also gave it a muffler mod and now the saw runs superb. 

I got similar on my 372 .

[Craigb]

9 minutes ago, Stubby said:

I got similar on my 372 .

home made? It makes such a difference to the saw.