MCCULLOCH The official McCulloch thread

[heimannm]

I don't have any experience with those saws Scott, but the IPL's list the same PN 69250 used in the Super 797 and the CP125/125S.

Mark

 

[Scott Kelsey]

I don't have any experience with those saws Scott, but the IPL's list the same PN 69250 used in the Super 797 and the CP125/125S.

Mark

Thank you for that bit of information Mark.

 

[jacob j.]

Can anyone tell me if the CP125 rod is specific to that saw? Can a CP125 piston be paired with say a 101 rod or 797 rod? I have a CP125 block that I need a rod for and trying to figure out what can be used.

The CP rod uses a 1/2" wrist pin. The early 797 rods used a 9/16" wrist pin and are longer, because the 9/16" wrist pin pistons have a much shorter deck height. The later 797 rod and CP rods are the same, as Mark pointed out. The early 101 motors also used the 9/16" wrist pin rods but the later 101s used the same 1/2" wrist pin rod as the later 797 and CP. All you need to make sure of is that you have a 1/2" wrist pin piston and matching rod, or 9/16" piston and matching rod, and you're good to go.

The 101, CP, and 797 all have the same stroke so either rod/piston combination will work. You can even use the SP-125 crank with a 1/2" wrist pin rod and piston to make a runner - I've built many.

 

[Scott Kelsey]

The CP rod uses a 1/2" wrist pin. The early 797 rods used a 9/16" wrist pin and are longer, because the 9/16" wrist pin pistons have a much shorter deck height. The later 797 rod and CP rods are the same, as Mark pointed out. The early 101 motors also used the 9/16" wrist pin rods but the later 101s used the same 1/2" wrist pin rod as the later 797 and CP. All you need to make sure of is that you have a 1/2" wrist pin piston and matching rod, or 9/16" piston and matching rod, and you're good to go.

The 101, CP, and 797 all have the same stroke so either rod/piston combination will work. You can even use the SP-125 crank with a 1/2" wrist pin rod and piston to make a runner - I've built many.

Thank you for the info JJ

 

[Scott Kelsey]

Well, I suppose I will put it here hoping it will get more views but if anyone can help out with a connecting rod I would be grateful. I have some parts I could trade towards or add cash, etc. Thanks for reading.

 

[John Deere 318]

guys, D 45 and 250 for sale, gotem about 2 years ago , cleaned up, carb kits fired them and sat them in a corner since. I purchased them off ebay and had fun making them run but I am not in love with them. Both 80 cc saws. I gave 175 each for em plus the ride. selling for same.

 

[John Deere 318]

more pics

 

[John Deere 318]

and more

 

[Maintenance Chief]

 

[heimannm]

I may have to take up cross country skiing this winter as long as I can use a good old 33 to help me along.

Mark

 

[Maintenance Chief]

I may have to take up cross country skiing this winter as long as I can use a good old 33 to help me along.

Mark

It's about the only way I'd take up skiing.
Really a testament to the versatility of the McCulloch chainsaw engine.

 

[Squareground3691]

One more to the Mac addition, Those 7-10 are some of my favorites,

 

[John Deere 318]

I agree 100 percent, those 7 10s are super reliable and powerful. I put a chip in my oldest one cuz I got tired of the points. It made a difference in starting.

 

[cinci5]

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[Scott Kelsey]

Hi everyone. Looking for some part numbers. I need numbers for rings for a 101 standard bore piston and a 101 .010 piston. I will be on the hunt and I figured numbers would be most helpful. Thanks in advance if anyone can help.

 

[heimannm]

Scott - It may take a little effort but you should be able to find the information you are looking for in these IPL's. Note that there are different versions of the 101 engines and part numbers for pistons and ring sets vary.

Mark

 

[Scott Kelsey]

Scott - It may take a little effort but you should be able to find the information you are looking for in these IPL's. Note that there are different versions of the 101 engines and part numbers for pistons and ring sets vary.

Mark

Thank you very much Mark.

 

[Scott Kelsey]

I was told this is a CP125 piston. It is a .040 over. I can not find info if Mcculloch made a .040 over for the CP. I do not see a .040 over in the list of pist9ns for a 101 in the literature Mark just provided. Thoughts?

 

[jacob j.]

I was told this is a CP125 piston. It is a .040 over. I can not find info if Mcculloch made a .040 over for the CP. I do not see a .040 over in the list of pistons for a 101 in the literature Mark just provided. Thoughts?

That looks like a Wiseco piston to me Scott - The arrow on top is a giveaway. That's the style they used in the late 60's-mid 70's.

In regard to your rings - standard bore 101/125 tool steel rings are 85608. The tool steel rings can be run in a chrome bore or iron liner motor.
The standard bore chrome-plated thin rings are 47865 I believe. These can only be used in iron liner bores.
101 .010" over rings are 66048 which I believe are also chrome-plated. The 85609 rings are the tool steel .010" over rings, non chromed.

 

[Scott Kelsey]

That looks like a Wiseco piston to me Scott - The arrow on top is a giveaway. That's the style they used in the late 60's-mid 70's.

In regard to your rings - standard bore 101/125 tool steel rings are 85608. The tool steel rings can be run in a chrome bore or iron liner motor.
The standard bore chrome-plated thin rings are 47865 I believe. These can only be used in iron liner bores.
101 .010" over rings are 66048 which I believe are also chrome-plated. The 85609 rings are the tool steel .010" over rings, non chromed.

Thank you very much. Definitely lots to learn.