McCulloch Chain Saws

[edju1958]

iN ORDER TO SAVE YOURSELF A LOT OF HEADACHES,IF i WERE YOU i'D CHANGE OVER TO THE sdc.

 

[PogoInTheWoods]

I think I'm going to try to get the bullfrog working...,

Go for it if you're gonna go to the trouble of getting the electric starter operating too. I say stay original with this one.

 

[edju1958]

I hope you can handle the 20 steps needed to tune a bullfrog.(maybe not quite that many,but ridiculous just the same)

 

[Maintenance supervisor]

Hi guys, it's been a little while. I just wanted to come on and share today's Mac score.
Got a 7-10, 3-10E, 1-40, 1-51, 1-52, and a 250.
The 3-10 fires on prime, 7-10 ran but had air leaks. I havent messed with any of the big saws but all pull over with compression.
Already tore down the 7-10. Everything looks good, all the intake screws backed off and blew the gaskets out. Will install new crank seals and replace gaskets as needed and should have a runner.
I do need the lower handle brace and recoil screws if someone can help.
I am also going to be looking for some parts for the 3-10E namely a battery box. I would like to add a working electric start saw to the collection. I think I'm going to try to get the bullfrog working, or should I just scrap it and do an SDC like I did last time?

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Boy you scored a nice group there! And now you can put a spike and a full wrap on that 7-10! Thanks to the guys on here.

 

[Maintenance supervisor]

Hi guys, it's been a little while. I just wanted to come on and share today's Mac score.
Got a 7-10, 3-10E, 1-40, 1-51, 1-52, and a 250.
The 3-10 fires on prime, 7-10 ran but had air leaks. I havent messed with any of the big saws but all pull over with compression.
Already tore down the 7-10. Everything looks good, all the intake screws backed off and blew the gaskets out. Will install new crank seals and replace gaskets as needed and should have a runner.
I do need the lower handle brace and recoil screws if someone can help.
I am also going to be looking for some parts for the 3-10E namely a battery box. I would like to add a working electric start saw to the collection. I think I'm going to try to get the bullfrog working, or should I just scrap it and do an SDC like I did last time?

Sent from my SM-G950U using Tapatalk

Is that the 250 with the full wrap handlebar?

 

[2broke2ride]

Boy you scored a nice group there! And now you can put a spike and a full wrap on that 7-10! Thanks to the guys on here.

Lol, the 7-10 is just one more addition to my 70cc lineup. It will share the shelf with a 5-10, 6-10, and a PM700.

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[Maintenance supervisor]

Lol, the 7-10 is just one more addition to my 70cc lineup. It will share the shelf with a 5-10, 6-10, and a PM700.

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Shelf? I've seen your wood piles ! I doubt your saws are shelf warmers.

 

[2broke2ride]

Shelf? I've seen your wood piles ! I doubt your saws are shelf warmers.

Haha, they gotta go somewhere when I'm not using them!! But yeah, they get used lol.

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[fossil]

Great haul Kevin!

 

[2broke2ride]

Is that the 250 with the full wrap handlebar?

No, that's the 1-52, 250 is the one in the back with the black clutch cover missing the air cleaner lid.

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[Manic84]

Thanks for the great advice everyone! Waiting on new welch plugs to arrive before I can go back in and put that little screen in that I forgot.
On a side note, is there anywhere to buy something like a box of assorted welch plugs? They seem awfully expensive for what they are from most sources I found. For a few dollars more you can get a whole new carb kit that includes the welch plugs(which is what I did in this case).

Meanwhile, I got the pull rope stuff taken apart, cleaned and reassembled with some dry lube. Pull is nice and retracts perfectly now, so at least that part's done.

For the curious about some of my grandfathers other saws that I received, there's an Eager Beaver, 3 10-10's, a 250 and a 39.
I think the 39 is the most interesting looking, I'd love to get it running but I have no idea where to begin on something like it. I'll need to do my research first.
View attachment 848087

You said the carb you're working on is an SDC and have three more 10-10 saws, right?
If memory serves me well, I think the plugs for the main on the SDC are 5/16 OD. Rotary corp has them in bulk, but I'm not and don't know a rotary dealer... So I can't tell you the price. You'd have to find either a walbro or aftermarket dealer and ask them for prices. (but don't hold your breath for a reasonable price though) I've not seen any plug assortments for sale, except for the 10 pack of 7/16 (MDC type) walbro/tecumseh ones from Stens.

You're better off just getting a whole rebuild kit and saving the welch plugs from there. It's kinda inconvenient, but if you do a lot of repairs, you rack up a decent amount fairly quickly.

However, most of the time you don't have to remove the welch plugs... unless there is something deeply wrong with the passage or the check valve itself.

Excellent macs by the way.

 

[j-jock]

Yep, I have a bouquet of older direct drive Macs, and will attempt to post them here.
Bob

 

[heimannm]

The D 45 is a fairly rare saw. They are not particularly valuable but there are not many of them out there. I think this is the one I got from Kevin Krotenko through eBay.



Mark

 

[j-jock]

The D 45 is a fairly rare saw. They are not particularly valuable but there are not many of them out there. I think this is the one I got from Kevin Krotenko through eBay.

View attachment 848444

Mark

The Macs have just followed me home over the years. I never looked at the saws because of their possible value, and was not intentionally attempting to build a large collection. My collection is quite modest.
When I worked in the woods starting in 1959, the Macs were the only saws in our camp, so I developed a real liking for them. I also have a couple of large Pioneers and Power Machine chainsaws from the period, all run on a prime, and some are fully operational. I can't explain why I love old saws, I just do.
Bob

 

[MS460WOODCHUCK]

Hey guys is there a difference between the pm610 and pm650 besides the name and yellow airfilter cover on the 650?

 

[j-jock]

Hey guys is there a difference between the pm610 and pm650 besides the name and yellow airfilter cover on the 650?

Sorry, I am not familiar with those numbers.
I think pm610 and pm650 might be Macs, and not saws made by Power Machine. Power Machine, built saws in Vancouver BC, and in Eastern Canada. They also built saws under other company's brand names, such as Skilsaw.
Bob

 

[Syncop8r]

PM = Pro Mac.
Someone asked the same question in this thread a few weeks ago.
From memory there isn't much difference, I think the cc rating is the same? Something about the rings...

 

[ThistleIA]

Hey guys is there a difference between the pm610 and pm650 besides the name and yellow airfilter cover on the 650?

PM 610 & PM650 are both 3.7 cube/60cc saws.There are some minor differences,the 650 was marketed as a ''professional saw'' has decomp button for easier starting,tool steel piston rings.Where the 610 has no decomp button,cast iron rings & was considered a ''farm/ranch'' model.

Both are very good saws,somewhat heavy,but practically bulletproof & not real difficult to work on if/when repairs/maintenance are needed.

610 produced 1978 to 1994.First one I bought summer 1992,used it very heavily 8 yrs,then it sat until selling it 2011.Bought a pristine replacement summer 2013,liked it so much. The 650 produced 1978 to 1985,they dont seem to be near as plentiful,but are still out there at a fair price if you look.

 

[heimannm]

There was some thought that the porting of the 650 was different as users were convinced they were more aggressive that the 610 variant but it may have been just the difference in the rings. I think the 690 (cut off saw) was supposed to be the same block as the 650 but my 690 does not have a compression release. There was also a PM655 that looked a lot like the PM650 but with a die cast air filter cover as opposed to the plastic one. According to the IPL's there was also a PM645 which was the 55 cc version of "The Professional" but I have never seen one or even a photo of one.





Mark

 

[fossil]

Hey guys is there a difference between the pm610 and pm650 besides the name and yellow airfilter cover on the 650?

Have a look at this IPL which is for all (or most of) that 3.7 series. The notes at the bottom of each page denote differences. Marks's reference to the possible porting change wouldn't show up here though.