McCulloch Chain Saws

[northwest saws]

Would anyone happen to have some cross referenced skf, timken, nsk, etc. part numbers for the bearings and seals off a mcculloch model 73? I found a nos flywheel side bearing and seal & one pto side seal but still need the rest. I'm having trouble finding any info, if I can't find anything its not the end of the world though. I'll just take them in here in a couple weeks to a local bearing supply shop and have them size match em. Shouldn't be too difficult as the remaining bearings and seals are relatively normal sae sizes.

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[heimannm]

Aaron - rotate your puller so the jaws are adjacent to the screws, that should prevent bending the washer again.

northwest - I don't have any information to help you but I would appreciate if you post any details you find. I brought a couple of Model 73 saws home with me from Oregon and I have two of my own. Perhaps one of these days I will go through the four to come up with two runners.

Mark

 

[vizette]

Finally getting a couple pictures of the beast up after some test cuts - first time running it. (bubble pack makes good oil pee-pads) Man that thing is a handful! I couldn't imagine slinging that around all day... You'd have to be built like Hulk Hogan. Love that sound though, and I'm sure my neighbors hate me.

Front of the gas tank is off a 250 so the paint doesn't quite match - the original has some cratering inside to the point that it had a small hole out the front. Will bead blast it, jb-weld it, and get it back on one day. Tank and gas cap are NOS from Bob (that hurt a little). The original is just eaten up inside, with a finger size hole out the bottom. Didn't have to rebuild the carb for once though - woohoo! Have a bucking spike waiting, just need to get some hardware to mount it.

Was looking into changing to 3/8 8T rim (currently .404 spur), that seems possible. I'd think that would get a nice balance of chain speed and power with a 24" sprocket nose bar? OTOH I have an old Remington 24" roller nose and might just go with that and keep .404. Could really use a new nose though.

Question regarding to the top cover - I feel like something is missing there. It rattles around all over the place even when the nut is tight, but after looking at the IPL everything seems correct.

-Rich

 

[mogulmasher]

Swapped 18" bar off my 10-10a onto 10-10s tonight. I think this will be perfect set up for this saw.

While I had clutch cover off decided to take a peak in muffler. Somebody has cleaned it up. Maybe there's other work too cause this seems stronger than my last 10-10s and pm55 l've had. Also it has a louvered cover. I thought 10-10s had a reed muffler?

 

[Maintenance supervisor]

I had one with the louvered cover , still had the spark arrestor in it.
I run an 18" with a 8 pin rim on my PM55 and I like it.

 

[ML12]

Well a day after getting the 81 running I thoroughly tested it out tonight. Hauled off 2 trailer dump loads of mostly oak with some maple mixed in. Saw ran quite well, but I feel like it's leaving a little on the table up top. I don't know if it's that #31 hi jet that's a little rich or if the fixed jet carb just holds it back a bit. I've got a sdc 38 from my sp80 parts saw I might try on it. You guys think it'll run better?

I also ran my 10-10s in the pile with a 16" bar. Thing runs like a scalded cat. What an awesome little saw. I think throwing an 18" bar on it will be perfect.View attachment 836389View attachment 836390

My SP81 has the fixed highspeed jet carb in it too, I found that in order to adequately load the saw up to get it running clean in the cut I needed a long bar and big wood, otherwise there wasn't enough load and it just 4 stroked.

 

[ML12]

Picked up this one tonight for $40CAD. I think its a 1-10 based on the tank and the bullfrog carb and the 1.75" bore. Its in pretty perfect shape overall.
I plan to shoehorn my 7-10 motor into it and use the 7-10 tank and handle assembly so that I can run the SDC carb. Everything should fit right? I will need to use the rear shroud from the 7-10 as well because of the decomp I think.

This project will get put on the back burner for a while as I have quite a few other things ahead of it in the queue.

 

[Max the Mac Man]

Maybe the seat is just buggered up and the needle can't seal?

I had a Homelite 240 that I almost just dropped a match in the gas tank and walked away from because it would do this. Turns out there was just some funk floating around that would randomly end up in the needle seat. It would be fine for days, then one day flood, leak gas out the muffler, etc. If I had an nickel for every time I had it apart, I could retire. Same fiasco with a 10-10 carb that had a loose welch plug. Everything looked good when I took it apart, and then finally one day the plug literally fell out. Must've been the factory sealant around the edges holding it in, but it never felt loose on inspection. That 240 starts and runs flawlessly now and I've actually come to like it quite a bit.

Anyway, might try checking down the needle hole with a loupe, or magnifying glass, or take a picture with your phone (+flash) and see what it looks like? You can zoom in pretty well with a digital pic if you can get a good light down there and get it to focus. FWIW, I got a cheap set of plastic loupes of different magnifications on Amazon and REALLY like them for this kind of stuff.

Have you been able to test pressure on it? I just use a piece of (new) fuel line and see if it'll stick to my tongue if I put a vacuum on it, or hold pressure if I try to blow air through it. You can usually hear it hiss if it's leaking, or put a few drops of wd-40 down there and see if it'll bubble. Gotta get a mityvac one of these days...

-Rich

Yeah I pulled vacuum on it before I installed it after the rebuild. it held fine. double checked it after I tore it down the second time to check needle value and welch plugs. Just gonna write it off as a paper weight lol. Built a few and all went well. This one, and the issues it caused with the saw had me scratching my head a few weeks.

 

[sawnerd]

Would anyone happen to have some cross referenced skf, timken, nsk, etc. part numbers for the bearings and seals off a mcculloch model 73? I found a nos flywheel side bearing and seal & one pto side seal but still need the rest. I'm having trouble finding any info, if I can't find anything its not the end of the world though. I'll just take them in here in a couple weeks to a local bearing supply shop and have them size match em. Shouldn't be too difficult as the remaining bearings and seals are relatively normal sae sizes.

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You can try entering the old part numbers on this page: http://www2.chicago-rawhide.com/pop...C0DVYAM3jFveOpXngTiYOlnqJkPJMCwqPkc_zQ05S3pxk

 

[heimannm]

ML12 - Most likely a 2-10 given the black top. You will need the insulator that goes between the cylinder and the air box from the 7-10 as well as the muffler for starters.

Mark

 

[vizette]

When you hear a rattle in the muffler of the ebay saw (7-10) you just got.



Not the best picture - the bottom piece is a part of a ring. The rest looks cast, so I'm assuming piston bits.

"Just found at a local estate sale...a very interesting old chainsaw. " Those of you that hang out there will recognize that description.

To be continued....

 

[ThistleIA]

When you hear a rattle in the muffler of the ebay saw (7-10) you just got.

View attachment 836959

Not the best picture - the bottom piece is a part of a ring. The rest looks cast, so I'm assuming piston bits.

"Just found at a local estate sale...a very interesting old chainsaw. " Those of you that hang out there will recognize that description.

To be continued....

Yes I recognize that part of Seller's ads...Never bought anything from them,past 2-3 yrs seen maybe 3-4 or so that looked interesting but changed my mind.

 

[Maintenance supervisor]

When you hear a rattle in the muffler of the ebay saw (7-10) you just got.

View attachment 836959

Not the best picture - the bottom piece is a part of a ring. The rest looks cast, so I'm assuming piston bits.

"Just found at a local estate sale...a very interesting old chainsaw. " Those of you that hang out there will recognize that description.

To be continued....

"Yous buys your ticket, yous take your chances"
Ebay is always a gamble for me and honestly I'm surprised when something even shows up.

 

[vizette]

Yes I recognize that part of Seller's ads...Never bought anything from them,past 2-3 yrs seen maybe 3-4 or so that looked interesting but changed my mind.

It's hit or miss with that seller, there are some gems that come through now and then. I've tried to convince them that they would sell better if they'd provide the tags in the carb box, but they don't seem to reply much to anyone. Steady stream of Mac's though, and some of them are priced pretty well even if they are parts saws...

I'm just hoping the cylinder survived as I've got a hot mess of a 7-10 with new rings and seals I can hopefully throw in this one.

Better news is that a third 7-10 showed up a couple days ago that looks very promising.

Question now that I think about it - one of the 7-10 I have has what looks like rivets in the lower handle strap. Is that a "thing"? Like there's some attachment that some had? I feel like I've seen that before... Or is that just someone's handy work for who knows what?

-Rich

 

[2broke2ride]

When you hear a rattle in the muffler of the ebay saw (7-10) you just got.

View attachment 836959

Not the best picture - the bottom piece is a part of a ring. The rest looks cast, so I'm assuming piston bits.

"Just found at a local estate sale...a very interesting old chainsaw. " Those of you that hang out there will recognize that description.

To be continued....

I have bought two saws from that seller. The first was my 5-10 which I totally tore down and rebuilt. It was cosmetically rough and needed quite a bit. The other was my 6-10, it is an early manual oiler only saw. That one is a runner right out of the box, didnt even need a carb rebuild.
All and all I feel like they have the saws priced right to take a gamble on.
I am just wondering where the heck.alk.of these saws came from lol.

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[T_zero]

and the question on someones mind.....who is the seller?

 

[2broke2ride]

Ladybug007

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[rwoods]

Got a break in the rain today with a temp of 82* so I was doing a little mowing when I ran across this crooked dead ash. Fired up the PM800 and put it down.



Just a tad over bar length at the falling cut.


Add the two bottom rounds not shown (collectively ten 2' cuts) and three or four 6" to 12" cuts to what is shown here and you have what my 800 will do with a tank of fuel. I usually complain about mileage but I was okay today as I am not yet acclimated to the heat.


I noticed that my custom fan shroud has given up the ghost with half of it MIA. I may use a heavier gauge for the rebuild. Will post some pictures where I land.
Ron

 

[Woodslasher]

Link Will this piston fit a 1-43 or a Super 250? I was poking around with my Super 250/1-43 Frankensaw getting it ready for a bath when I decided it would be a good idea to peek in the muffler. I kinda wished I hadn’t when I saw some nasty scoring and heard a crunchy metal-on-metal noise when I pulled it over. The only thing that makes me feel better is the knowledge that these saw are fairly simple to work on as my older brother managed to strip a 1-42 down to the bare long block and re-assemble it without the help of the internet.

 

[fossil]

Got a break in the rain today with a temp of 82* so I was doing a little mowing when I ran across this crooked dead ash. Fired up the PM800 and put it down.

View attachment 837168

Just a tad over bar length at the falling cut.
View attachment 837169

Add the two bottom rounds not shown (collectively ten 2' cuts) and three or four 6" to 12" cuts to what is shown here and you have what my 800 will do with a tank of fuel. I usually complain about mileage but I was okay today as I am not yet acclimated to the heat.
View attachment 837171

I noticed that my custom fan shroud has given up the ghost with half of it MIA. I may use a heavier gauge for the rebuild. Will post some pictures where I land.
Ron

Ron,

Did you do that to get out of mowing?