MCCULLOCH The official McCulloch thread

[Dream]

Heres the piston. Some scratches. Not terrible considering.

 

[Dream]

Got the PM6A back together with the parts that Kevin, AKA Gizzard sent me. Thanks again. Runs and oils, but having a little trouble getting the carb to take a tune. Anyone know the base settings for the Walbro MDC?
Low, high, metering lever height, and popoff pressure?

 

[Bigmac]

Can someone give me the part number for the smaller flywheel side seal for an sp81, the large seal the fits inside the bearing.
Also looking for sp81 rings if anyone has a spare set.

 

[Steve]

Can someone give me the part number for the smaller flywheel side seal for an sp81, the large seal the fits inside the bearing.
Also looking for sp81 rings if anyone has a spare set.

National 471551. If you can't get it i have some Mr. N!

 

[Gizzard]

Got the PM6A back together with the parts that Kevin, AKA Gizzard sent me. Thanks again. Runs and oils, but having a little trouble getting the carb to take a tune. Anyone know the base settings for the Walbro MDC?
Low, high, metering lever height, and popoff pressure?

I don't have access to my files right now (misplaced the darn hard drive they on). Maybe can try what is mentioned in this link for setting the metering lever. https://houseofhomelite.proboards.com/thread/2736/walbro-mdc-carburetors

 

[Bigmac]

National 471551. If you can't get it i have some Mr. N!

Thanks Steve!

 

[Maintenance Chief]

Stripping down two of my donor saws this afternoon.
The first one says its a PM700 on the filter cover, but it has model #60011602. Cant find that in the model number cross reference, but the one I have is from 1977. This saw may be newer. Anyone know?
The other saw that didnt have a filter cover is a 700. Model #600061D.

Yes it's a 700 ,I have one same number. Thats a later model number similar to the numbers they used on the 4300 saw.

 

[Maintenance Chief]

Heres what the last 700 I just took apart looked like. No air filter present at all. Rings are completely gone. Piston and cylinder dont look terrible, in spite of all the crud it ate. View attachment 246185 View attachment 246186 View attachment 246187 View attachment 246188 View attachment 246189

That oiler looks painful.

 

[Maintenance Chief]

The famous "eye brow " exhaust port I see .The design idea is often a well debated subject as is the actual purpose .--I'll just keep my yap shut or rather my typing finger--one .

I wasn't exactly sure what 82cc saw was gonna come my way so I purchased a project cylinder ( model airplane)thats a B casting from the same person. I bought them both for the exact retail value of the nos kit at the time he bought it .

 

[heimannm]

Is your flywheel missing some fins?

Mark

 

[Dream]

I don't have access to my files right now (misplaced the darn hard drive they on). Maybe can try what is mentioned in this link for setting the metering lever. https://houseofhomelite.proboards.com/thread/2736/walbro-mdc-carburetors

Thanks Kevin.

 

[Dream]

Is your flywheel missing some fins?

Mark

All the fins. I guess if it was a model airplane engine, then it would have enough air moving across it from the prop to cool it.

 

[Dream]

Yes it's a 700 ,I have one same number. Thats a later model number similar to the numbers they used on the 4300 saw.View attachment 246416 View attachment 246417

Thanks Chief. I have one of those late models. I guess I could have just looked under the filter...

 

[heimannm]

Back from the PNW GTG with some additional stuff.



I will attempt to make one running 73 from these two project saws for Sawfun.



These will likely become donors for other projects.



Here is a fine catch.





Mark

 

[heimannm]

And here is the most unique part...the carry case for the leads and electrode storage is shown in some McCulloch 170 welder documentation...but the rectifier...I've never seen or even heard of such a thing that I can recall.





Mark

 

[Dream]

Nice haul Mark.
So many questions.
1. What power head is used for the welder?
That would be a handy machine at 170 amps with the DC converter. I wonder what the duty cycle is?
2. What is the big orange power head for?
3. When were the 730s made, and what cu in/CC?
4. I like the front handle on the 250. Did they offer a 1/2 or 3/4 wrap bar for those?
5. Most important.
I dont see my SP125 in there. You must have forgotten to pick one up for me.

 

[Bigmac]

Back from the PNW GTG with some additional stuff.

View attachment 246429

I will attempt to make one running 73 from these two project saws for Sawfun.

View attachment 246430

These will likely become donors for other projects.

View attachment 246431

Here is a fine catch.

View attachment 246433

View attachment 246434

Mark

Nice Mark! It was really nice to finally meet in person!

 

[Maintenance Chief]

Is your flywheel missing some fins?

Mark

Yeah they are completely machined off. The cylinder is in good shape but this one didn't come with a piston and connecting rod inside.

 

[Al Smith]

All the fins. I guess if it was a model airplane engine, then it would have enough air moving across it from the prop to cool it.

I think they call those RC mini planes "giant scale " .I've seen a few of them but none with a revamped McCulloch engine so far .They are a hoot to watch as some get in "dog fights " trailing a streamer their opponent tries to chew off with their prop .There's a field about 4 miles away from me . They get a lot of money in those things .

 

[heimannm]

The 170 Welder is 103 cc like the 790, 795, and 940. The literature says 50% duty cycle at 170 amps AC...that might be a little optimistic.

The orange power head is a 642 Solo.

The 73 is 120 cc and were built in 1955-56.

250? Like this?



There were chrome, galvanized steel, and painted full wraps for those saws, standard on the 1-5X and Super 250 models.







Nate still has your 125.

Mark