MCCULLOCH The official McCulloch thread

[Steve]

So I'm currently running an SDC on my 7-10. The Tilly had some wear in the throttle shaft, and wouldnt tune right.
Was concerned about getting enough fuel, as the SDC is from a 1010A, but it tuned right in. 4 strokes out of the cut as it should. Idles fine. Throttle response seems good, so I'm assuming its not hurting the saw. No noticeable difference in performance from the Tilly to the Walbro, but the old one did have issues.
I'll have to see which SDC it is.
Have to clean the carb anyway. Fuel filter is coming apart and going into the carb.
Maybe someone more experienced can tell me if I'm going the right or wrong way?

Some of the carbs on the 1010s where large bore so you may not be choking it at all. Remember. No matter the displacement, the carb can only flow so much air determined by the carb bore. So, unless your saw has forced induction (which would be beyond awesome!) the carb installed will be able to feed the proper amount of fuel.

 

[Al Smith]

On that carb .The one I have on the 6-10 the choke is much larger than the throttle butter fly .I don't remember exactly what it is as far as model but it's the parts from two carbs .I'm only guessing it might in some way work like a ram tube .It was an experiment that worked .

 

[Dream]

Some of the carbs on the 1010s where large bore so you may not be choking it at all. Remember. No matter the displacement, the carb can only flow so much air determined by the carb bore. So, unless your saw has forced induction (which would be beyond awesome!) the carb installed will be able to feed the proper amount of fuel.

So, turbo 7-10 then?
Sounds like fun.
Just have to figure out where to mount the hair dryers...

 

[Maintenance Chief]

So, turbo 7-10 then?
Sounds like fun.
Just have to figure out where to mount the hair dryers...

It would have ti be a draw through system.

 

[Maintenance Chief]

Honestly I have only run a "fresh" 7-10 and various 700s , weight isn't something that really deters me from picking a saw in most instances. Having a light saw is nice though.
I'm a little inclined to agree with Poge on this debat though the 7-10 feels snappy ,but hang a bit more weight with the body and it doesn't jump up as hard.
I have a very creampuff later made 700 I have to freshen up and run, but I don't feel like one model is always better than another all the time.
None of my current "user" 700s have the reed in the muffler and that did make a difference in performance.
I just wish some manufacturer would start making a danm pop up piston for McCulloch saws!

 

[Al Smith]

It's not so much by some method you could not raise the comp on a clamshell rather for what purpose ? On those 70 cc macs they usually if in good tune do very well for a 40 year old saw there are no more parts to repair other than new old stock .If you don't get stingy with the oil and don't run rocket fuel in them they might still be running in another 40 years .I have one and only one I've tweeked and that one doesn't even get started that often just to show what can be done to them . It would not hold up if I used it all the time and I've spent too much time on it for that to happen .

 

[Jethro 2t sniffer]

It's not so much by some method you could not raise the comp on a clamshell rather for what purpose ? On those 70 cc macs they usually if in good tune do very well for a 40 year old saw there are no more parts to repair other than new old stock .If you don't get stingy with the oil and don't run rocket fuel in them they might still be running in another 40 years .I have one and only one I've tweeked and that one doesn't even get started that often just to show what can be done to them . It would not hold up if I used it all the time and I've spent too much time on it for that to happen .

You make a good point there. For the sake of a couple seconds you get 50 years of running a saw. I love all my 70s. 1 of the 7-10s has a couple good grooves and missing chrome patches yet runs very well its probably on par with the 700. With a 16 and no brake it makes a great clambering around limbing saw. It replaced the husky 350 I sold. A running parts saw I call it

 

[Dream]

So I worked on the PM6A today. Thought I had a fuel delivery issue. Nope. Crank seals are gone.
Has excellent compression. Piston and cylinder look really good. Glad I ended up taking it apart though. There is a ton of vanish and crud in the clamshell cover. That probably would have done some damage if id kept running it.
New crank bearings and seals are in order. Anyone know a cross reference for these?

 

[Dream]

Got some of it cleaned up.
Found the plastic cap to the manual oiler pump broken,

Piston cleaned up easily. Almost no carbon. None in the ring grooves. Gentle wipe with scotch brite and it looks pretty good.

 

[heimannm]

I don't have the information in front of me right now. Just measure the shaft and the bore, I am sure you will find they are standard sizes and you can find them easily enough through a good bearing shop or by searching on line.

Mark

 

[Al Smith]

Seal part number 67175 .Could not cross reference but there are several on flea bay .Bearing number 66854 .No cross either but it looks like a roller or needle bearing .Shouldn't be a problem

 

[Dream]

Thanks guys. I can see a Torrington # on the bearings.
Nothing on the seals. I will get measurements. There's a bearing supply here in town that may be able to help.

 

[Simpsonsawshop]

Hi guys, I thought I'd pop in and show you guys what I've been up to. It's been a minute lol.
I just finished up this SP70 for a customer. It is a really clean saw and runs great. He should be happy with it.

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[Simpsonsawshop]

Next in line is what I will refer to as project "Scrap Heap". It is an SP81 that I built from a pile of parts from at least 3 saws. It has an infamous LRB piston and rings in it that was uses for no other reason than it came with the box of parts. The oil tank is cracked and I could use a replacement if anyone has anything,it is the "sideways" oiler tank with the snap ring Grove on the clutch side vearing. also needs the rubber grommet to go around the adjustment needles. And I would like to find a nonbrake clutch cover.
Willing to pay for parts is someone has something.

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[Simpsonsawshop]

Next on deck we have this 3-10E. 145PSI compression, no spark. Hoping to get it.running and the E start working as well.

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[Al Smith]

Just a comment on that battery start saw .A guy by the name of Jim Rigdon rebuilt one of those batteries using the cells used on battery drills ..

 

[Steve]

Just a comment on that battery start saw .A guy by the name of Jim Rigdon rebuilt one of those batteries using the cells used on battery drills ..

A guy named me did the same.

 

[Steve]

Next on deck we have this 3-10E. 145PSI compression, no spark. Hoping to get it.running and the E start working as well.

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That's sweet. You have the rarest part which is the battery box. Most of them where thrown away and replaced with the normal strap that was there.

 

[Simpsonsawshop]

Just a comment on that battery start saw .A guy by the name of Jim Rigdon rebuilt one of those batteries using the cells used on battery drills ..

A guy named me did the same.

I can just buy the cells from Ebay or Amazon too.

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[Simpsonsawshop]

That's sweet. You have the rarest part which is the battery box. Most of them where thrown away and replaced with the normal strap that was there.

I know, I have another one missing the battery box.

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