MCCULLOCH The official McCulloch thread

[heimannm]

I have had this one for a while. It still runs and cuts but does not see much use since I got the Echo 2511T and a custom all black Mini Mac.









Close cousin to the SP40 is the PM510. I am still looking for a PM515.



Mark

 

[Bigmac]

It has the boss for the high idle, but it was not drilled out. I made a sort of drill guide and drilled it, then noticed the throttle trigger did not have the provision for the speed screw. JJ is taking care of that for me.

Mark

That’s interesting! Haven’t seen that! Makes me wonder what came first, the high idle cp or the standard sp125. Or they overlaped? Probably!
I have a somewhat odd sp125 that has a screw on tag with single mount, looks original, because the tag only has one hole. I am sure there are tons more, just interesting, Makes me wonder if they had some warranty issues with the screws coming loose versus the rivets, it looks like they started out with rivets and ended with rivets

 

[heimannm]

Here is the latest SP125, I am thinking that this one has been worked on a time or two in the past. It came to Iowa from Saw King with a stripped spark plug thread among other issues. I don't believe the black shroud is original...on that subject has anyone come up with a good method for restoring the nuts in the shroud? This one is missing both and I would eventually like to be able to secure the flywheel housing to the shroud.









Mark

 

[Bigmac]

Here is the latest SP125, I am thinking that this one has been worked on a time or two in the past. It came to Iowa from Saw King with a stripped spark plug thread among other issues. I don't believe the black shroud is original...on that subject has anyone come up with a good method for restoring the nuts in the shroud? This one is missing both and I would eventually like to be able to secure the flywheel housing to the shroud.

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Mark

Working on a fix Mark, will give an update when I get everything

 

[jacob j.]

Here is the latest SP125, I am thinking that this one has been worked on a time or two in the past. It came to Iowa from Saw King with a stripped spark plug thread among other issues. I don't believe the black shroud is original...on that subject has anyone come up with a good method for restoring the nuts in the shroud? This one is missing both and I would eventually like to be able to secure the flywheel housing to the shroud.

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Mark

Working on a fix Mark, will give an update when I get everything

Guys -

I'm looking at using Tee nuts with tubular rivets or cold rivets (tinder rivets) mounted to the shroud where the captured nuts have broken off. I'll let you know how it goes.

https://www.mcmaster.com/tee-nuts/screw-mount-nuts-6/

 

[Bigmac]

Guys -

I'm looking at using Tee nuts with tubular rivets or cold rivets (tinder rivets) mounted to the shroud where the captured nuts have broken off. I'll let you know how it goes.

https://www.mcmaster.com/tee-nuts/screw-mount-nuts-6/

I have some similar plans

 

[fossil]

Is there any reason you couldn't JB Weld some square nuts in there?

 

[jacob j.]

Is there any reason you couldn't JB Weld some square nuts in there?

I don't think JB Weld would hold up to the vibration. The back end of those starter/fan housings vibrates quite a bit. If McCulloch had used a thicker material for the cylinder shroud,
it might not have been such an issue.

 

[fossil]

Have you considered rivet nuts (rivnuts)?

I know they flog install tools for those but a screw with a couple of nuts to jam them onto the threads against the head works well too. They can be had with very thin heads.

 

[Bigmac]

Have you considered rivet nuts (rivnuts)?

I know they flog install tools for those but a screw with a couple of nuts to jam them onto the threads against the head works well too. They can be had with very thin heads.

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The hole is too big for that standard ones, Going to try some longer versions with two washers and see if that holds

 

[fossil]

What's the diameter of the hole?

 

[Maintenance Chief]

Since you guys are working on big McCulloch saws , I found some interesting literature at a book sale this past weekend.

 

[Maintenance Chief]

 

[Maintenance Chief]

Thats it for McCulloch in the books I found.

 

[Bigmac]

What's the diameter of the hole?

It’s about a 3/8 of an inch hole, Are used JJ’s idea with rivets seems to work pretty well

 

[Maintenance Chief]

I think rivnuts with washers would work well.

 

[jacob j.]

It’s about a 3/8 of an inch hole, Are used JJ’s idea with rivets seems to work pretty wellView attachment 305108View attachment 305109

That's pretty much how I pictured it going together Nathan, and Tee nuts are widely available. The only reason I was thinking of tubular rivets would be that they have a smaller head,
but I think that set-up works pretty good.

 

[Bigmac]

I think rivnuts with washers would work well.

I tried that first, and I don’t have deep enough grip nutserts Need to order up some different ones, mine are for .020-.130 And that wasn’t enough to grab two washers, they make .130-.225 But they are much less common. I can also have my buddy tig an aluminum nut in there, which would probably be the best solution, Or tig plate across there and put a standard nutsert in

 

[Maintenance Chief]

I tried that first, and I don’t have deep enough grip nutserts Need to order up some different ones, mine are for .020-.130 And that wasn’t enough to grab two washers, they make .130-.225 But they are much less common. I can also have my buddy tig an aluminum nut in there, which would probably be the best solution, Or tig plate across there and put a standard nutsert in

The quality stainless steel washer is generally thinner if that helps.

 

[Maintenance Chief]

What does an orginal one look like? Might be an airplane fastener out there?