McCulloch Chain Saws

[edju1958]

I continued getting parts together today for the 610 build.I came across an air box/handle that had a broken throttle trigger in it.Since I didn't have another good handle,& I had a trigger here that I bought from Bob J.yrs.ago,I thought I'd give it a go.It wasn't quite as nightmarish as I thought it'd be,actually fairly simple.Just drive the pin out,unhook the spring from the trigger,(the throttle linkage was already free due to where it was broke),slide the new trigger in & hook the spring onto it & remember to hook the throttle lever back in the new trigger,& get the OPL in proper position,& drive the pin back in.Easy-peasy.

I also put a fuel tank in the fan housing & removed the wrap around chain brake lever.I'll be using a newer style brake that has a metal flag.

 

[Rotax Steve]

OK,as I said earlier,I can't seem to find the 4 bolts needed for holding the oil tank onto the engine on a PM610.The IPL says it uses a M6.3-24 bolt.Even for being metric that seems a bit odd.Does anyone here have any they'd like to unload?

PM me. I have a couple of them.
Steve

 

[Squareground3691]

Glad to know I'm not the only one who looses track of where I'm at!!!!

To many thread counts,Lol

 

[Jeffrey F.]

OK,as I said earlier,I can't seem to find the 4 bolts needed for holding the oil tank onto the engine on a PM610.The IPL says it uses a M6.3-24 bolt.Even for being metric that seems a bit odd.Does anyone here have any they'd like to unload?

That's gotta be a misprint OMG !!

 

[Woodslasher]

Just bought a 1-72 pho does anyone know what the bar mount is? Also anyone with experience repairing and trouble shooting them. Says air vane governor . This is my first yellow magnesium purchase so I'm kinda out of my comfort zone. Thanks and appreciation in advance

What length are you looking for? I have a bar or three for those saws floating around that I'd be happy to send your way.

 

[heimannm]

No misprint, it is a peculiar fastener. Not quite 1/4-28 but bigger that a standard M6. McCulloch used them in several locations on several saws including the bar nuts on some 300 Series and electric saws...



Mark

 

[heimannm]

Of course in another IPL they use the same part number for an M6x1 flange nut...



I checked some just now and at least they correctly identified the thread pitch on each, 1 mm.

Mark

 

[edju1958]

I'm curious as to what saw is a model 600082?Would that be a PM650?

 

[ThistleIA]

I'm curious as to what saw is a model 600082?Would that be a PM650?

Super Pro 40 2.3 cube,40cc produced July 1975 to February 1977 PM650 is 600046

 

[heimannm]

Good work Jon.

For those that might still be interested, the 6.3 and a standard M6 screw are both 1mm pitch but the 6.3 is clearly larger in diameter.





Mark

 

[edju1958]

Super Pro 40 2.3 cube,40cc produced July 1975 to February 1977 PM650 is 600046

Sorry,the model # 600068C.

 

[bob kern]

Of course in another IPL they use the same part number for an M6x1 flange nut...

View attachment 1098354

I checked some just now and at least they correctly identified the thread pitch on each, 1 mm.

Mark

These are the things that try men's souls!!

 

[Rocker59]

M

Sorry,the model # 600068C.

Montgomery Wards 610.

 

[Breckinridge Elkins]

Had some time to play with the 1-61again and finally got the flywheel off. Man, that sucker was tight. You can see my two pullers I made in the pic. The one made from barstock worked after a second revision. PB Blaster didn't do a damn thing. Should have tried kroil, maybe. Now on to the clutch, but it seems the bolts are a different size.
Take a look at the.oil around the crank spindle. Would you say that looks like the crank seal is leaking? I suspect this thing has been blowing oil out of every seal like an English motorcycle.

 

[Fordsoll]

I read a post about engine swapping McCulloch chainsaws to put bigger engines in it, I learned that McCulloch made kart engines I never knew that so I found it interesting and looked it up and then I realized I actually have one of these in an abandoned gokart I had that I was keeping for the metal. This weekend I will pull the engine and inspect the condition but I do know that it is seized. I was gonna pull it before because it was a good looking 2 stroke engine that I wanted to rebuild but I didn't know about parts or anything for it so I left it. So does anyone know if you can find parts for these kart engines in general? I don't know what model it is. If the plating on the cylinder is good (if they even plated these with anything) then I am sure it will just need a piston and rings. also assuming the block isn't cracked because the engine hasn't been covered for at least 4 years. It has been seized before I even got it and I don't know how maybe it was straight gassed or running lean from a bad seal or gasket? I just learned about these engines a few minutes ago so don't mind my lack of knowledge on them. I will provide an update when I get it in the garage and possibly unseized.

 

[Breckinridge Elkins]

Cast iron cylinder sleeve, maybe. Sounds like a project.

 

[Fordsoll]

I will check to see if the kart is a McCulloch too but It is in bad shape (No rear axle, tires etc)

 

[Breckinridge Elkins]

... And the clutch. Much easier to get off. I think the bolts for this one are 10-24 but I am not sure.
Now that I have the gearbox off everything can go in the parts washer.

 

[heimannm]

I would guess the oil you see around the points box is not coming through the crankshaft seals. If the seals were leaking that badly the points would be operating in an oil bath and would not function. The flywheel side seals rarely fail due to their relatively easy life compared to the PTO side on a direct drive saw. On the gear drive saws, the seal that take the most abuse are on the output shaft as everything else is pretty well protected.

As far as I know, all of the kart engines were cast iron sleeves so in the worst case you might need to have the cylinder bored oversize and install an oversize piston & rings. There are many parts available for the kart engine still today and oversize piston/ring sets were very common. I have some things, but Terry Ives in California has pistons and rings and is able to bore them oversize if that's what it takes.

Mark

 

[edju1958]

Correct me if I'm wrong,but does an SKF6119 seal replace the Mac 110260?