MCCULLOCH The official McCulloch thread

[jacob j.]

I have yet to lay hands on them, whadda you think is up with it, and what do you think the second saw from the left is?

If the second saw from the left is gear-drive, it could be an 890 or 1-81/82. I'd have to see if it has an automatic oiler/DSP. If it doesn't have the auto oiler then it's likely an 840 or 1-81.

The 125 circled in red may have a kart block or a 797/CP-125 block. All three of those were popular mods back in the day. My dad had a 125 with a 797 motor shoe-horned into it.

 

[Woodslasher]

If the second saw from the left is gear-drive, it could be an 890 or 1-81/82. I'd have to see if it has an automatic oiler/DSP. If it doesn't have the auto oiler then it's likely an 840 or 1-81.

The 125 circled in red may have a kart block or a 797/CP-125 block. All three of those were popular mods back in the day. My dad had a 125 with a 797 motor shoe-horned into it.

What makes a 797/CP125 block mo' betta? Aren't they all the same displacement?

 

[jacob j.]

What makes a 797/CP125 block mo' betta? Aren't they all the same displacement?

Different port timing mainly - some guys like the lower grunt of the CP and 797 blocks when running longer bars. The CP and 797 blocks have a more hemispherical
combustion chamber as well, which may have contributed to a cleaner dispersal of the flame front.

 

[Al Smith]

I'm certainly no expert but have heard the 797 block was closer to the 101 kart engine than any other like a 125 .Mention was made by the California crowd the round mufflers are a better choice than the later used on the 125 . In the glory days of two cycle go-karts about a zillion companies made parts .Where they all went heaven only knows but it has been upwards of 40 years ago or more . The proverbial needle in the hay stack .

 

[fossil]

I'm guessing the circled saw is a CP125.

The decomp lever is in the right place. the recoil shield is correct and as mentioned, so is the muffler.

The AF cover is likely from an SP saw.

 

[Vinnywv]

As mentioned, the cp125 seems to have more hind end to it. Yes it appears to have the right decomp and muffler to be a cp125. Ive got 3 125 saws, a cp, sp, sp125c. The cp has more to it. They all run great sound great and have way more power than ya need to trim the lilacs but the cp125 runs best in my opinion. Id keep it over the sp saws if i had to choose one.

 

[fossil]

I have a nice CP. Fun to run.

The only real issue with it when I bought it was a missing welch plug in the cylinder.
Apparently a pretty common happening.

Makes a noise in a pressure test.

 

[edju1958]

I've been watching a 660 on Feebay & it seems to be going quiter cheap at this point.What is the correct displacement on this saw?Acres' has it listed at 87cc which seems to be kinda on the low end since the 550 is 99cc,but then again the 660 is a gear drive saw.

 

[Woodslasher]

 

[Woodslasher]

 

[Woodslasher]

So far I think all I'll need is possibly a clutch and a clutch drum, but I have yet to tear into them.

 

[Woodslasher]

A trip in the solvent tank revealed a crack on the case of the solid yellow one, and the recoil cover/shroud on the CP125 has a big ol' crack in it. All that being said, I'm thinking I may transfer the yellow saw's tank/upper half onto the parts unit to eliminate the cracked case and I'll see if I can't get the CP125 as my saw.

 

[jacob j.]

A trip in the solvent tank revealed a crack on the case of the solid yellow one, and the recoil cover/shroud on the CP125 has a big ol' crack in it. All that being said, I'm thinking I may transfer the yellow saw's tank/upper half onto the parts unit to eliminate the cracked case and I'll see if I can't get the CP125 as my saw.
View attachment 343379 View attachment 343380

Cracks in oil tanks are pretty routine. Shaun has welded a couple for me already.

I think Tim nailed the ID on the CP saw - if you could end up with that one, you'd like it.

Those look like some good projects.

 

[fossil]

A trip in the solvent tank revealed a crack on the case of the solid yellow one, and the recoil cover/shroud on the CP125 has a big ol' crack in it. All that being said, I'm thinking I may transfer the yellow saw's tank/upper half onto the parts unit to eliminate the cracked case and I'll see if I can't get the CP125 as my saw.
View attachment 343379 View attachment 343380

If you do get the CP try to fit the rear handle grip insert from the parts saw to the CP. I don't think the CP grips are easy to find and since they are a press fit, they fall out.

I made one for mine.

I drilled a hole into it lengthwise and fitted a longer bolt to the rear of the handle so it's secured like the 10 series grips.

 

[Vinnywv]

Thats awesome. I made my own too. Its a piece of beech. Very comfortable and a perfect fit. Also used a longer bolt in the handle.

 

[jacob j.]

If you do get the CP try to fit the rear handle grip insert from the parts saw to the CP. I don't think the CP grips are easy to find and since they are a press fit, they fall out.

I made one for mine.

I drilled a hole into it lengthwise and fitted a longer bolt to the rear of the handle so it's secured like the 10 series grips.

Thats awesome. I made my own too. Its a piece of beech. Very comfortable and a perfect fit. Also used a longer bolt in the handle. View attachment 343428

I've seen a lot of homemade wood inserts on these saws and the old Poulans. I know some of the ones used on CP were glue-in and the glue would crack, get brittle,
and the insert would fall out as Tim mentioned. I made one out of hard, closed-cell foam once that worked ok. I use contact cement to re-fit those.

 

[fossil]

Thats awesome. I made my own too. Its a piece of beech. Very comfortable and a perfect fit. Also used a longer bolt in the handle. View attachment 343428

Son of a Beech Vinny! Looks great.

I wonder if that CP is a later model or has a replacement tank.

It's the first CP I've seen a pic of that has a throttle lock (hole).

 

[Woodslasher]

Son of a Beech Vinny! Looks great.

I wonder if that CP is a later model or has a replacement tank.

It's the first CP I've seen a pic of that has a throttle lock (hole).

Out of the three saws 2 have SP125 ID tags, the CP125 tank is the only one w/o out tag so I'mma say it's probably original. Here's the damage on the CP recoil shroud, and a group pic of the sorta-washed saws. I have a few off brands I need to finish before I really dig into these guys, and I should probably fix my bench top first as well. However, it's really really hard to not poke at these guys.

 

[Woodslasher]

Now I have to decide, used 76" hard nose bar, used 50" sprocket nose, new 40" sprocket nose, or new 54" sprocket nose bar. What length would best suit a CP125 in NorCal? .404 is a given, fyi.

 

[Vinnywv]

Decisions decisions