Stihl Ms 660 Rebuild

[Vintage Engine Repairs]

A closer look at the damage. Nothi no structural, and nothing that I make out to cause it to suck air.

It does need new brake band supports, which I’ll fabricate.

Edit: oops, pic would help:

 

[Lightning Performance]

A closer look at the damage. Nothi no structural, and nothing that I make out to cause it to suck air.

It does need new brake band supports, which I’ll fabricate.

Edit: oops, pic would help:

View attachment 1136071

Bar stud is my worry not the rest of it.

 

[Vintage Engine Repairs]

Bar stud is my worry not the rest of it.

Bar stud is all good

 

[Vintage Engine Repairs]

Note: I say new crankshaft, I mean bearings..

View attachment My project (2).mp4

 

[Lightning Performance]

Note: I say new crankshaft, I mean bearings..

View attachment 1136079

Lolly sticks are the ticket!

 

[Vintage Engine Repairs]

Lolly sticks are the ticket!

Haha I wonder if I can find a piece of aluminium or steel this thickness and jb weld it in place!

Edit - feeler gauges

 

[Lightning Performance]

Haha I wonder if I can find a piece of aluminium or steel this thickness and jb weld it in place!

Edit - feeler gauges

Don't be picky. Brass and whole other host of items including copper pipe will do. Think schedule 80
Remember to prep and zinc coat the non ferrous alloys before bedding them with JB.

 

[Vintage Engine Repairs]

Don't be picky. Brass and whole other host of items including copper pipe will do. Think schedule 80
Remember to prep and zinc coat the non ferrous alloys before bedding them with JB.

Can you elaborate on that zinc coating? Is that to stop galvanic corrosion?

So true regarding other materials, any will work, but being able to slide different widths of feeler gauges in to get the right height sure is handy heck I may stick them in different locations for a quick and easy fix if necessary lol.

Edit: just realised I have a mini lathe I can turn down some brass rod, drill the hole in the case and jb weld it in place fancy!

 

[Lightning Performance]

Can you elaborate on that zinc coating? Is that to stop galvanic corrosion?

So true regarding other materials, any will work, but being able to slide different widths of feeler gauges in to get the right height sure is handy heck I may stick them in different locations for a quick and easy fix if necessary lol.

Edit: just realised I have a mini lathe I can turn down some brass rod, drill the hole in the case and jb weld it in place fancy!

No.
.... it's for bite or adhesion. It also seals the surface.
In marine applications it keeps the paint on. Once the coating is physically breached it is just another primer coat.

Greased popsicle sticks slide right out. JB and those space the brake band evenly. Add them anywhere you like. Double the bump stops no sweat. Been there did that. I'll get you links to zinc costs in a spray can.

 

[Lightning Performance]

 

[Lightning Performance]

Type in
Zinc primer... on Amazon to see product applications. They explain more than most in the description section. Three different products are offered in many formats of application.

 

[Vintage Engine Repairs]

No.
.... it's for bite or adhesion. It also seals the surface.
In marine applications it keeps the paint on. Once the coating is physically breached it is just another primer coat.

Greased popsicle sticks slide right out. JB and those space the brake band evenly. Add them anywhere you like. Double the bump stops no sweat. Been there did that. I'll get you links to zinc costs in a spray can.

Interesting couldn’t you just use an abrasive to roughen the surface of the steel feeler gauge for a similar result? I’ll google that zinc paint none the less!

Ahh edit: I use an etch epoxy primer already

 

[Vintage Engine Repairs]

Great advise as always from @trains on a good way to build up the supports for the break band.

Gets held nicely now using JB steel stick epoxy metal putty.

Clean post areas, form the break band thickness around the drum, install the drum and fit pyrmid shaped pieces of steel stick. Gently file them when set to tightly accept the oversize drum. Add break band and file to fit a final time..

 

[Vintage Engine Repairs]

Coming back together nicely.

 

[Vintage Engine Repairs]

Rebuild complete.

 

[president]

Rebuild complete.

View attachment 1140740

View attachment 1140739

are you missing a ball in the bearing pocket Tom?

 

[Mad Professor]

Tom, did the saw run veggie oil?

The case rot on the clutch side looks like that.

 

[ZeroJunk]

are you missing a ball in the bearing pocket Tom?

That bearing has to be replaced. I assume he did.

 

[Vintage Engine Repairs]

are you missing a ball in the bearing pocket Tom?

You’re lost me?

Edit: you’ve*

 

[Vintage Engine Repairs]

Tom, did the saw run veggie oil?

The case rot on the clutch side looks like that.

Na just palm mate