McCulloch Chain Saws

[cbfarmall]

Chris, Bob Johnson had the big welch plugs last time I checked. I had a similar problem on one of my 550's a short while ago, I took it all the way down and shot a little carburetor cleaner in the check valve. I could not get the seat out to do anything further, but it sure seemed to take care of the problems I was having with mine.

The nice thing about the carburetors used on the Super 250's is they are fit with a choke rather than a primer. The primer version will work fine if you have a primer but they can be expensive to buy, if you can find one.

Mark

Thanks Mark. After 4 hours of work I got it straightened out again, I hope permanently this time. In my rush to rebuild the carburetor and get the saw running I only gave the tank a passing glance and thought it was OK. Drained it today, pulled the cover and found this:

Needless to say, that's what was jamming up my carby. Scrubbed that varnish out, cut a new gasket, and cleaned the carb many times to get that valve open. I was on the verge of popping that welch plug. I probably should run a tank thru to make sure it stays cleaned out.

My other 250 responded well to adjusting the points and timing a little hotter but I think it needs some seals. Bearings felt a tiny bit loose and the idle is all over the place.

Do these 250s use the same bearings and seals as the 125s? If yes, I have a set.

 

[Teddy.Scout]

It's OK Teddy. We expect you to make a few mistakes.
.
.

That tends to happen when you spend all that time around a buncha old Stihl Homelite 990G knockoffs.....:monkey:

Ya! Ya!
990G or 909G knock off! LOL!

 

[RandyMac]

and stihl cheaped out with that rollerchain drive

 

[cbfarmall]

and stihl cheaped out with that rollerchain drive

They did correct their mistake on the 090G and copy the Homelite and Mac gearbox with the idler.

Chris B.

 

[Teddy.Scout]

and stihl cheaped out with that rollerchain drive

They did correct their mistake on the 090G and copy the Homelite and Mac gearbox with the idler.

Chris B.

You are both right! And agree with you 100%.
But who is still in business?
I do like Stihl, And also the old Macs and Homeys.
But the truth is, they sold out!

I have no loyalties, just favor towards gear drives. ANY!!

 

[Brian13]

I finally got to cut with my recently aquired Super Pro 105. All I can say is WOW After years of cutting with a variety of 10-10's, this thing just rocked my world. Incredible! The SP125's and 797's must be something to run, this little one makes me grin.

And a grainy video of it going through about a 32" oak.

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/DtPZdYuzfro?hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/DtPZdYuzfro?hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>

Very nice! That is a great looking saw.

 

[rwoods]

Eccentric, thanks for your encouragement to give it another go. My ring compressor is on the bench in the picture below. If you don’t recognize it there is a hint in the last picture.
Belgian, an East Tennessee use for full wrap bars is simply to keep your saw upright in the back of your firewood truck. Didn’t really appreciate this until this past week, every time I looked by half wrap was on its side sliding around while the full wrap saws just took the rough ride in style.
Everyone, I don’t know how you keep up with so many project saws. But I am beginning to understand why you may have so many. In my quest to build a saw with the NOS PM850 cylinder I chanced upon, I acquired a PM570 to provide the “chassis”. After looking the PM570 over, I couldn’t just junk it so I bought a burned up 10-10 for the 570 motor. After a $60 trip to NAPA for necessary expendables, I assembled with lots of help from this site the 570 only to discover that the crankcase is different than a 10-10 –duh! So I am now putting the 570 together and I’ll look for another donor saw for my real project. I’m sure you been there, but after disassembling the 570 again due to the oil pump valve grinning from the bench I proceed to lose one of the small intake screws – I spent the next two hours looking for it including disassembling the saw a third time to see if it was lodged in somewhere. It wasn’t. Never did find the screw even after sweeping the floor. Finally gave up late last night and tried to start it – no fire. Now why didn’t I start there first? I changed out the coil from the 10-10 but still no fire. Today, I filed the points and swapped the condenser. FIRE! And it will start with a prime, so I guess I’ll rebuild the carb this week. By the way, I discovered the reason the 570 had next to no compression – the top piston ring was broken.
Below are some pictures of my Labor Day workout with my PM800’s. Spend more time hauling and unloading than I did cutting but I really enjoyed the power advantage of these saws over my PM700 and my 036 Pro. I did a little tweeting to the frame of my favorite 800 when a 20” stem rolled on me. The culprit was attached to the tree in the next to last picture. It was my last tree – 42” at my last cut to sever it from the twelve foot root ball that wanted to fall into me instead of righting itself as most of the other trees did. A little vice and hammer work should fix the 800.
Pictures in order: 2 shots of 570 and ring compressor; firewood site and this week’s hauling left; Labor Day’s hauls; tweeted 800; culprit and ring compressor donor.
Thanks again for all the helpful advice and good reading.
Ron
Picture continue in next post.

 

[rwoods]

Final two pictures:

 

[Teddy.Scout]

rwoods, slippery slope your on with saws!
Give it a week-month, you will have a good handful of saws around your bench!
Looks like you have a good wrench hand, so I am sure your saws will be going sooner then my projects!

boda65, SWEET SAW! That bar looks good on there too!!!

 

[rwoods]

rwoods, slippery slope your on with saws!
Give it a week-month, you will have a good handful of saws around your bench!
Looks like you have a good wrench hand, so I am sure your saws will be going sooner then my projects!

boda65, SWEET SAW! That bar looks good on there too!!!

I'm sure I'm a goner. Next to finding my dad's old Mac, I would really like to run a 100cc plus Mac to see if I would actually use one. Ron

[/IMG][/IMG][/IMG][/IMG]

 

[boda65]

THE BAR JIM THE BAR!

Please tell me more about where you got it and the spec's/numbers on that bar...

Mark

The bar is a Carlton 36-81-A2115-PS and I got it from Baileys. The chain came with it and it's Oregon 73JGX 3/8 58 gauge skip tooth with 115 drive links. I had to have two drive links taken out, the mac sprocket must be a little closer to the end of the bar I guess.

As for the bar, I had to mill the slot to fit the 3/8 bar studs. Thinking only the rails were hardened, I used a high speed steel mill. Turns out its all hard and the cutter was pretty well trashed by the time I got the slot done. I think a carbide mill would have done it OK. I also had to make an oil passage from the adjuster hole into the groove. I ended up using a small diameter thin cutoff wheel in my dremel and just carved a semi-circle into the bottom of the groove until it poked through to the hole. Seems to work good. One last thing, I had to make spacers because this bar is much thinner (think height-wise) than the old bars. If you don't use them, the chain will rub your bar plates and wear through them. I had an old already damaged set of bar plates, I just modified them to work.

All in all, it was a little work, but what else can we do when no one makes the right mount? So far it seems to be working well.
Jim

 

[boda65]

RWOODS, that looks like an awesome firewood haul, and one of the coolest firewood haulers I've ever seen. I would love to have one of those.
Watch out, that yellow bug bites hard. I started out with a couple 10-10's and am now awash in a sea of yellow. I was OK with two or three saws until I found this site while searching for a little info. I'm still not sure what happened. There are a lot of enablers around here:hmm3grin2orange:

 

[SawGarage]

It's OK Teddy. We expect you to make a few mistakes.
.
.
.
That tends to happen when you spend all that time around a buncha old Stihl Homelite 990G knockoffs.....

I thought it was just his math... after all, I think he calculated one of those 090G's around 137cc displacement :monkey::spam: lol

You are both right! And agree with you 100%.
But who is still in business?
I do like Stihl, And also the old Macs and Homeys.
But the truth is, they sold out!

That's cause they didn't take their customer's for a ride with a CHEAP-O Chain drive!!

so, I'm confused...help me out, I thought you liked GEAR drives??

Seems you actually like CHAIN drives?? maybe i'm out in left field here, help me out


J

 

[SawGarage]

Boda- nice work.


sounds like they must heat-treat the whole bar...which makes sense.

J

 

[rwoods]

Embedded pictures at last.

 

[rwoods]

That's it folks.

 

[SawGarage]

rwoods- what's your caulk on the workbench for?:monkey:


Nice 800 (right?)!! btw.

J

 

[little possum]

Nice couple of saws posted lately.

And a deuce! :drool: I need one of those

 

[willysmn]

McCulloch in Oak

RWOODS I enjoyed your video and what a tree! Must be difficult to load them up on the trailer. I would have enjoyed it better to have been present though. No Oaks like that around here. SOme Ponderosa, yes. Very tall!
The saw was running well.
Pruit

 

[rwoods]

rwoods- what's your caulk on the workbench for?:monkey:


Nice 800 (right?)!! btw.

J

Eccentric suggested that I make a ring compressor out of something. The caulk tube was the closest fit I could find; so I cut off the bottom and split it. You can see it in the background.

Yes, although I haven't checked the serial number to verify that it is a 800. I don't know if someone added the compression release, which I don't think is typical for an 800, but everything else including the chainbrake appears to be correct for an 800. You can't see it but a prior owner hacked out a slot in the chainbrake for the release valve. Ron