McCulloch Chain Saws

[tom maslar]

Here is what I have
6 SP125
two with 2' bars, and 3 with 3' bars and one with a 30" bar
795 4'bar
890 2'bar
2 old 33s
Promac 800
250
3-10
790
640
1-62
Mini Mac 6

The 10-10A has a wrinkle texture, semi-gloss black finish. I want to paint mine but don't see a good clone of the texture on Amazon. I saw a vht engine paint but I don't think it's a good match. Any ideas

 

[Jeffrey F.]

The 10-10A has a wrinkle texture, semi-gloss black finish. I want to paint mine but don't see a good clone of the texture on Amazon. I saw a vht engine paint but I don't think it's a good match. Any ideas

Per Mark H.

 

[Jeffrey F.]

Diaphragm testing continued today...the thicker rubber diaphragm worked but I have to wonder how long it would last.View attachment 1082485


View attachment 1082486

View attachment 1082487

More to follow...

Mark

Wow it looks nasty

 

[Squareground3691]

Did up a 36” .404 Oregon Reduced Weight bar , for a special saw , didn’t come out to bad , to be continued, Lol

 

[heimannm]

I left the Teflon/fiberglass set in the saw since they worked just fine and I was running short on time. The primer on this saw was even working and would function normally with any of the fuel pump sets installed. I did notice the .020 rubber seemed to take a lot more priming before it was pumping fuel normally but I made cuts with all of them including the OEM set and would say I could not judge any noticable differences in performance.

The 440 test bed has since been thoroughly cleaned and moved into the display area...



To simplify the process of removing/installing the carburetor, a couple of modified 7/16" wrenches comes in handy. (that's RedKote, not blood...)



Mark

 

[vinnywv]

I did te same thing to 2 wrenches solely to work on mac saws. Also a 7/16 combo wrench and also for carbs. The other is a 1/4" combo i use for those tiny bolts and tight spaces holding cylinders together. I also ground down a 1/4" deepwell socket for those little bolts. I dont round the flats off anymore and im able to reuse them.

 

[heimannm]

I have a few modified sockets for special purposes...L-R 5/16 for the needle seat on Tillotson HL and MAC/BDC carburetors, 5/16 or 8mm for Stihl carburetors, 1/4 for those crankcase screws on the 10 Series.





Mark

 

[Jeffrey F.]

View attachment 1082733

I left the Teflon/fiberglass set in the saw since they worked just fine and I was running short on time. The primer on this saw was even working and would function normally with any of the fuel pump sets installed. I did notice the .020 rubber seemed to take a lot more priming before it was pumping fuel normally but I made cuts with all of them including the OEM set and would say I could not judge any noticable differences in performance.

The 440 test bed has since been thoroughly cleaned and moved into the display area...

View attachment 1082737

To simplify the process of removing/installing the carburetor, a couple of modified 7/16" wrenches comes in handy. (that's RedKote, not blood...)

View attachment 1082743

Mark

Thanks for doing this test. Your time is valuable but doing this is a great testament to your steadfastness with McCulloch. Great Work Jeff

 

[tom maslar]

Wow it looks nasty

Per Mark H.

Found this on Amazon. I'll be spraying the pull start cover and top of gas tank in a few weeks. I'll post the results. It looks to have a very similar wrinkle effect. I'm gonna use loctite 515 on the original gasket, which is stuck to the top half of the tank. Other than being compressed, it looks ok.

 

[Maintenance supervisor]

Found this on Amazon. I'll be spraying the pull start cover and top of gas tank in a few weeks. I'll post the results. It looks to have a very similar wrinkle effect. I'm gonna use loctite 515 on the original gasket, which is stuck to the top half of the tank. Other than being compressed, it looks ok.

Save yourself a headache and get the vitron gasket.

 

[heimannm]

^

 

[tom maslar]

Save yourself a headache and get the vitron gasket.

Ok, will do. Best place to pick it up?

 

[drumbum]

^

Got a question for you Mark,

What is your current opinion on the displacement of the TimberBear version of the 600 series.

I have seen where you posted that they had to be 58 or 60cc. Any confirmation?

Was McCulloch doing what Poulan does, i.e. stickers are cheaper than engine assemblies.....

Thanks

 

[Plowmaster]

There is a 2 man model 99 mac on detroit Craigslist for 249$ says it starts w a little gas pour.... not sure if this is the rite place to post this (Macomb county) came up on det.craigslist

 

[Maintenance supervisor]

Ok, will do. Best place to pick it up?

I bought mine from proform off ebay.
I think Dukes saw salvage carries them now too, which I prefer for most stuff.

 

[heimannm]

There were 3.4 and 3.7 in3 versions of the 600 Series saws. The 3.4 are 1-13/16" bore like the 57cc 10 Series saws. I don't remember the bore of the 3.7 but it is bigger...

The literature describing them was quite confusing with blatantly inaccurate details.

Mark

 

[heimannm]

The 3.7 In3 versions were 1.837" bore.

On the other hand, you can't alway depend on McCulloch's documentation...



Mark

 

[heimannm]

 

[drumbum]

The 3.7 In3 versions were 1.837" bore.

On the other hand, you can't alway depend on McCulloch's documentation...

View attachment 1083372

Mark

Thanks again,

Just curious as to the displacement of the timberbear.

I see so much differing info,...I figured you would have had one apart to compare at some point in the past....

 

[sawfun]

View attachment 1082733

I left the Teflon/fiberglass set in the saw since they worked just fine and I was running short on time. The primer on this saw was even working and would function normally with any of the fuel pump sets installed. I did notice the .020 rubber seemed to take a lot more priming before it was pumping fuel normally but I made cuts with all of them including the OEM set and would say I could not judge any noticable differences in performance.

The 440 test bed has since been thoroughly cleaned and moved into the display area...

View attachment 1082737

To simplify the process of removing/installing the carburetor, a couple of modified 7/16" wrenches comes in handy. (that's RedKote, not blood...)

View attachment 1082743

Mark

I've found a Craftsman 7/16 ignition wrench very handy for those jobs. It has an almost 90 degree offset which helps.