McCulloch Chain Saws

[ThistleIA]

Trying to replace a recoil spring on an SP125.
Is there some trick to this? Seems like the housing is on there pretty good with not much to grab on to rotate it off.

 

[Aaron Rybicki]

Perfect. Thank you for the reference.

 

[heimannm]

Tim - I compiled my list from the information in the McCulloch Engine Carburetors Usage Guide & Illustrated Parts List Revision 1, 2, and 3. Since McCulloch was always changing and updating there were later changes not addressed in the manual. I just threw the Zama on the list since I knew they used it on saws that came out after the last guide was published.

Ed - 3/32x3/16", get real Tygon if you can. I order it from McMaster Carr 25' and a time.

Mark

 

[heimannm]

By the way - I am still having issues with the computer at home giving me an error, I think it actually says "Internet Blocked" or something like that when I try to access ArboristSite. No problems from my phone or from the computer in the museum office but I generally try to catch up at the end of the day and I am unable to do that currently. I am able to visit the other site, e-Bay, etc. from home without issues, only ArboristSite has this problem.

Mark

 

[Aaron Rybicki]

Is there any easy way to re-thread the threads on a crankshaft? I was attempting to remove a flywheel by tapping on the nut method (which has never ever failed me in the past) and it messed up some of the threads.. now the nut won’t screw all the way on...

 

[MacAttack]

Is there any easy way to re-thread the threads on a crankshaft? I was attempting to remove a flywheel by tapping on the nut method (which has never ever failed me in the past) and it messed up some of the threads.. now the nut won’t screw all the way on...

That's weird...usually you'd mess up the thrrads on the end, not toward the middle.

Would the threads clean up with a die?

 

[heimannm]

Which saw Aaron? I think the large frame saws are 7/16-20 and 10 Series are 3/8-24, you may be able to run a die over them to clean them up enough to work. Consider using a tall nut in the future.

Mark

 

[Aaron Rybicki]

I really hate to say it but a SP125. They don’t look terribly bad and I probably didn’t have the nut far enough down on the crankshaft. I had just gotten the PTO crank seal to go in properly too.

 

[fossil]

Aaron. You might consider getting a thread repairing die. McMaster Carr has some reasonably priced ones. These dies straighten out the threads instead of recutting them.

I have a set I picked up at an auction and they work great. Really nice for cleaning up bar studs

https://www.mcmaster.com/rethreading-dies/thread-repairing-dies-for-tight-spots/

 

[Aaron Rybicki]

Aaron. You might consider getting a thread repairing die. McMaster Carr has some reasonably price ones. These dies straighten out the threads instead of recutting them.

I have a set I picked up at an auction and they work great. Really nice for cleaning up bar studs

https://www.mcmaster.com/rethreading-dies/thread-repairing-dies-for-tight-spots/

Gonna give this a try. Thanks for the help guys!

 

[ThistleIA]

Found me a complete set of vintage Craftsman thread cutting dies & taps,great condition in their sturdy plastic cases on ebay a while back,wouldnt be without them.Nice addition to my regular tap & die sets.

 

[MacAttack]

I really hate to say it but a SP125. They don’t look terribly bad and I probably didn’t have the nut far enough down on the crankshaft. I had just gotten the PTO crank seal to go in properly too.

That looks fixable. Always have the nut virtually flush with the threaded shaft whenever tapping on it. And use a brass or polymer mallet.

 

[Maintenance supervisor]

I have an entire tool box of modified pullers now, because of my fear of messing up a crank that can't be bought" down the street ". There's a few not even shown in the box! I figured it was cheap to break pullers than cranks.
I have used the "smack with heavy object " method but I used a 2 lb brass drift.
The thead restoring tools do work well, and I've used them on lug studs.

 

[edju1958]

Mark,I found out by sheer dumb luck today the size of the fuel line for the 3216.I was at the "belt store" to get a new belt for my riding mower & just happened to ask if they carried any small fuel line.The attendasnt said "we sure do" & I hauled out a piece out of my pocket about 3 in.long & asked "this small"?He said yes & went & got a box of genuine Tygon fuel line.I asked what size it was & he told me 3/32 IDx3/16 OD.I took what he had which was 8.75 ft.,& it was cheap too at 78 cents/ft.I managed to scrounge up just enough to do the 3216 yesterday,but I had no more of that size left.

 

[Todd Loosli]

You can try a thread file for about 14.00

 

[fossil]

Mark,I found out by sheer dumb luck today the size of the fuel line for the 3216.I was at the "belt store" to get a new belt for my riding mower & just happened to ask if they carried any small fuel line.The attendasnt said "we sure do" & I hauled out a piece out of my pocket about 3 in.long & asked "this small"?He said yes & went & got a box of genuine Tygon fuel line.I asked what size it was & he told me 3/32 IDx3/16 OD.I took what he had which was 8.75 ft.,& it was cheap too at 78 cents/ft.I managed to scrounge up just enough to do the 3216 yesterday,but I had no more of that size left.

If you read my email reply to your question your would have known on Monday.

 

[edju1958]

If you read my email reply to your question your would have known on Monday.

"Mine is a Power Mac 225-16. Is that the same thing?"
At that point we weren't sure if your model saw was the same as my 3216.

 

[MacAttack]

Mark,I found out by sheer dumb luck today the size of the fuel line for the 3216.I was at the "belt store" to get a new belt for my riding mower & just happened to ask if they carried any small fuel line.The attendasnt said "we sure do" & I hauled out a piece out of my pocket about 3 in.long & asked "this small"?He said yes & went & got a box of genuine Tygon fuel line.I asked what size it was & he told me 3/32 IDx3/16 OD.I took what he had which was 8.75 ft.,& it was cheap too at 78 cents/ft.I managed to scrounge up just enough to do the 3216 yesterday,but I had no more of that size left.

I should note this, it's probably the same as my garbage-picked 3818, which will almost certainly need fuel lines.

 

[edju1958]

I should note this, it's probably the same as my garbage-picked 3818, which will almost certainly need fuel lines.

Yes,I have a 3816 (same engine,just different size bar) & it takes the same size line.I actually have 2 of them & one has a bad ignition module.A new module is $40 from Bob J.,but I'm not sure it's worth putting $40 into.

 

[MacAttack]

Yes,I have a 3816 (same engine,just different size bar) & it takes the same size line.I actually have 2 of them & one has a bad ignition module.A new module is $40 from Bob J.,but I'm not sure it's worth putting $40 into.

I checked out my roadside-special out a few weeks ago.... Has a bright spark and 150psi compression. Score.

It's just leaking bar oil all over the place, and some kind folks here told me about the oil line that always breaks.