McCulloch Chain Saws

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I was wondering myself.... Much like the hobbits in Lord of the Rings with meals I have come to realize of the 10 series Macs there is First Mac, second Mac, and sometimes 3rd mac. First is for the shelf, second to use, third for parts (which ends up a runner then you need a 4th Mac lol.)

Point in case... Yesterday I went and bought a local complete 10-10S and a box of 10 series carcasses. Like I need more parts or saws lol. that makes like 5 10-10S saws I have now LOL
How many is to many ? Lol 😆
 
A little help needed. Haven't attempted to start the saw yet. But there was something rattling around inside the fuel tank. I was able to retrieve the two items at the bottom of the photo.

The person I got this from said he'd replaced the fuel lines. I am guessing that the smaller filter (black) was an older one that someone had just left in there.

Is it correct that the other one (I'm assuming that it  is a filter?) that matches the one on the smaller fuel line is the one that should be reinstalled?
 

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I finally got that pesky PM 5700 running! I put a new fuel line in it & a different carb.The original carb has something wrong with it that I can't figure out.I had to turn the lo screw out 2 full turns for it to throttle up without stuttering,then it wouldn't idle because it was set too rich.On top of that the hi needle wouldn't stay in,it kept falling out even with the spring on.Once I swapped out the carb it fired rioght up & idles nicely,throttles up well too.Here are some pics (just a rebadged Timber Bear or PM 605).I don't think this saw has ever seen wood,when I pulled the recoil off there wasn't a speck of sawdust anywhere.
 

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LMU67 - What a score, you now have two spare fuel filters...

The line with the filter on it should be connected to the inlet side of the carburetor, that is on the right/PTO side of the saw as you are looking at it.

From the left/starter side of the carburetor there should be a line to the primer/purge bulb, and finally a line from the primer/purge bulb back to the tank.

The primer/purge bulb simply pulls fuel through the carburetor and discharges back to the tank to insure there is fuel in the carburetor when you attempt to start the saw. It looks like they have replaced the fuel lines, but you probably need to remove the starter side of the housing and make sure they replaced the line from the oil tank to the pump as well, all of those lines are notorious for falling apart. The line from the pump to the bar pad almost never needs to be replaced, go figure.

Mark
 
Thats how we all start. And yes that junk one runs great just needs a few small parts. So then its in the mix and they keep coming. I say that as if it is a bad thing but its a fun hobby and doesnt generally make you spend a lot of money. Lots of donations once people know you enjoy it.

Then you start mixing parts and build a new saw. 7-10 engine put into a sp81 frame. So then its a sp7-10?? Or a 7-10 fuel tank and cylinder put into a cruddy g70. In a sense g7-10. They mix and match well. Youll just have to figure out the little differences and reverse engineer a little.

Been thinking of a sp70 mixed up with a gear box from a g70?!! A SPG70? i hate to tear apart a perfectly good saw but i think it would be cool. Antivibe gear drive ten series. Custom built one of a kind.
That's how I got my current SP125C. I was saving spare parts for my first one and realized I had enough parts for another saw.
 
This pic popped up on one of my other saw pages. Thought you Mac guys would like it.
Mervin Lentz at a timber Carnival. Late 60s . Hot saw event running a McCullch cart engine 125 cc 3 carbs running on alcohol and nitro. Custom designed expansion chamber designed by my father. Willis Long. Willis set a record at Albany timber Carnival. He cut a 30 inch fir log in 7.2 seconds
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This pic popped up on one of my other saw pages. Thought you Mac guys would like it.
Mervin Lentz at a timber Carnival. Late 60s . Hot saw event running a McCullch cart engine 125 cc 3 carbs running on alcohol and nitro. Custom designed expansion chamber designed by my father. Willis Long. Willis set a record at Albany timber Carnival. He cut a 30 inch fir log in 7.2 seconds
View attachment 1048374
That’s great picture , kudos to ur father 👍
 
This pic popped up on one of my other saw pages. Thought you Mac guys would like it.
Mervin Lentz at a timber Carnival. Late 60s . Hot saw event running a McCullch cart engine 125 cc 3 carbs running on alcohol and nitro. Custom designed expansion chamber designed by my father. Willis Long. Willis set a record at Albany timber Carnival. He cut a 30 inch fir log in 7.2 seconds
View attachment 1048374
This is what I envision old time loggers to look like. Lean and super buff, sculpted from running those heavy saws all day long.

This saw game has been going on for a long long time.
 
This is what I envision old time loggers to look like. Lean and super buff, sculpted from running those heavy saws all day long.

This saw game has been going on for a long long time.
Like making fast cars faster and racing them. Guys cant help but tinker and compete. Same with saws, lawnmowers, tractors, if it's gotta a motor on it someone wants to have bragging rights that theirs is the fastest. Now where is my SP70 with the 850 block..... LOL
 
I think I might've figured out what the problem was with the carb that was on the PM 5700.If you'll recall,I had to have the lo needle turned out 2 full turns in order for it to run without bogging when I'd throttle it up.It also ran so rich that it wouldn't idle even with the idle screw turned in all the way.The hi needle would fall out from vibration of the saw running.What would happen if some Bozo switched the needles?Would I be getting those results?BTW,I'm not that Bozo,I didn't pull the needles out of the carb till today.I won't find out if my theory is correct till I put that carb on a build that I'll be working on in the next couple months.
 
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