McCulloch Chain Saws

[struggle]

The 1-45 and 1-45 were more advanced than the previous models as they were equipped with bearings in the wrist pin, earlier models just had bushings.

They are not real speed demons (that is an understatement) but they do have good torque and live a long time. I have some in that line that don't have 90 PSI compression but they will still run and cut.

Most 1-45 and 1-46 models came with the McCulloch (Walbro) flat back carburetor with primer. If you are not familiar with that carburetor click on McCulloch Carburetor link in my signature for some additional information. You can always swap it out to a Tillotson HL if you prefer.

Unless I found one in really great condition with everything working properly including the primer in the carburetor, $50 to $100 is about all I would go.

They are rather heavy, they will be loud, they are rather slow in the cut, but they just keep going and going...if it is your only saw and you depend on firewood to be warm maybe not, on the other hand when I was 20 through 26 or 27 years old I kept the family warm all winter with one old saw and a spare chain or two. I couldn't do it today but some young buck with a lot of time and energy certainly could.

Mark

Tonight I did a quick look at the 1-40 and 1-43 I have and both have HL carbs on them from the looks. No primers. I assume this is a good thing from what I have read about flat backs.

Kind of happy about that. Both are complete saws but have recoil issues. I hope to make a runner out of maybe at least one. They are heavy. Both units have nice cylinders so that is a good starting point and the engraved/stamped Mcculloch bars around 19" cutting lenght.

The 1-43 seems to be several advacnes in the design over the 1-40. 1-43 looks to have auto oiler?
1-40 has the manual plunger on the front tank.

Also one has a Leisure brand spark plug. Never heard of such a thing?

 

[heimannm]

Can't sleep tonight...

The 1-40's were originally release with the "Lubri Mac" automatic chain oiler that scavenged oil residue from the crank case and directed it to the bar for lube but required running a 10:1 mix (no, I am not making this up). When that system proved inadequate they had to add the manual oiler and the only convenient place to put it was in front of the fuel tank. Look closely and you will see a divider plate that was added to separate the fuel tank from the added on oiler.

The 1-41 and later saws had the oil tank in the more usual spot but are manual oiler only.

The first automatic oilers in those style saws would have been the Super 250, 450, and 550 saws. As was so common with McCulloch saws, all of the automatic oilers were operated from crankcase pressure pulse.

Mark

 

[RandyMac]

Some of the last of the 250s had auto oil.

 

[little possum]

What models share the black cover that goes over the oil tank. And has holes drilled in it like the S250 cover. Looks maybe like a 1-53? But has 440 on the bottom. Ill have to check and get the other numbers.
Will a 80-87cc Mac pull a 28" roller with .404? Or do I need to save pennys for the 550?

 

[bergman 501]

my old mac 300 had auto and manual oiler? has a 250 gas tank now though, with out the oiler stuff in it. couldn't find a 300/380 etc tank.

 

[Eccentric]

Can't sleep tonight...

The 1-40's were originally release with the "Lubri Mac" automatic chain oiler that scavenged oil residue from the crank case and directed it to the bar for lube but required running a 10:1 mix (no, I am not making this up). When that system proved inadequate they had to add the manual oiler and the only convenient place to put it was in front of the fuel tank. Look closely and you will see a divider plate that was added to separate the fuel tank from the added on oiler.

The 1-41 and later saws had the oil tank in the more usual spot but are manual oiler only.

The first automatic oilers in those style saws would have been the Super 250, 450, and 550 saws. As was so common with McCulloch saws, all of the automatic oilers were operated from crankcase pressure pulse.

Mark

Some of the last of the 250s had auto oil.

my old mac 300 had auto and manual oiler? has a 250 gas tank now though, with out the oiler stuff in it. couldn't find a 300/380 etc tank.

According to the 1965 McCulloch Workshop Manual Supplement, the 380A (which was produced in 1963 and 1964) had an auto oiler, but wasn't distributed in the US. The 'non-A' 380 was distributed in the US during that time, but didn't have the auto oiler. The 300 replaced both the 380 and 380A in 1965, and had an auto oiler.

Looks like the 440 (which was also sold in 1963-1964) covered the '87cc auto oiler needs' in the US market during that time. The 450 was also released in 1965 with the auto oiler (and a few more cc). I believe the 550 was released in 1966. I've seen a late 'non-super' 250 with an auto oiler like Randy mentioned.

 

[little possum]

What models share the black cover that goes over the oil tank. And has holes drilled in it like the S250 cover. Looks maybe like a 1-53? But has 440 on the bottom. Ill have to check and get the other numbers.
Will a 80-87cc Mac pull a 28" roller with .404? Or do I need to save pennys for the 550?

Ok, think I have a 380 on my hands..

 

[Eccentric]

What models share the black cover that goes over the oil tank. And has holes drilled in it like the S250 cover. Looks maybe like a 1-53? But has 440 on the bottom. Ill have to check and get the other numbers.
Will a 80-87cc Mac pull a 28" roller with .404? Or do I need to save pennys for the 550?

The only models that I know of that had the holes drilled in the AF cover were the Super 250 and the 660 gear drive. Don't know if the Super 550 had 'em. A 380 shouldn't have had a drilled cover. Of course, the AF cover could have easily been switched from one saw to another. An 80-87cc McCulloch will run a 28" bar of .404 without problem. The 87cc saws (especially the S-250) would have more beans when doing it than the 80cc saws of course.

 

[Eccentric]

Ok, think I have a 380 on my hands..

Sounds like you have a frankensaw. Maybe a 440 engine used to build a front tank saw. Would effectively be a 300/380A. That'd run a 28" bar of .404 without issue.

 

[GrizzlyAdams86]

The 1-53 I have does have a black AF cover with holes like the Super 250. The name plate on the cover is a metal plate, not a decal. There is also a trim piece in the recessed spot on the back of the cover above the oiler/choke knobs. It also has a full wrap handle too, but only a manual oiler, which the Acers site said they only came with. The gas tank cover is different too. It has 2 spots on the recoil side that were cast into the cover but never machined out. Maybe for a thumb oiler on a different saw? I'll have to get some pictures of it when I can.

 

[watsonr]

Will this muffler fit a CP125?
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

or this one
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

I want to run the saw and don't care about what it looks like for now. I have the correct one coming, it's just taking a little longer than I thought.

Thanks,

 

[leeha]

Will this muffler fit a CP125?
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

or this one
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

I want to run the saw and don't care about what it looks like for now. I have the correct one coming, it's just taking a little longer than I thought.

Thanks,

The first one should fit.
Although it would not be correct.
The CP125 had the round directional muffler.




Lee

 

[paccity]

890

just thought id throw this up. got to make chips with it today.View attachment 201789

 

[Ambull]

just thought id throw this up. got to make chips with it today.View attachment 201789

That is one huge freakin tree.

 

[briantutt]

I take the bolt with jam nut out or the short hex head cap screw to remove the oiler ?

Brian

 

[joeymt33]

I take the bolt with jam nut out or the short hex head cap screw to remove the oiler ?

Brian

Remove the black Allen head at the top


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[briantutt]

Remove the black Allen head at the top


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Bolts out but it doesnt wiggle

Brian

 

[briantutt]

Gasket has seen better days

Brian

 

[joeymt33]

You may need to run the adjustment screw in. it's the one with the jam nut. That may give it room to come down then out


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[joeymt33]

That gasket was the problem. Dang!


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