MCCULLOCH The official McCulloch thread

[Duke Thieroff]

I'm rather certain it will run great

 

[heimannm]

I have a few saws that have been modified internally and they do perform pretty well.

Mark

 

[Duke Thieroff]

I have a few saws that have been modified internally and they do perform pretty well.

Mark

It's a pleasant surprise

 

[Maintenance Chief]

I'm not sure any 82cc McCulloch has ever made it to my hands unscathed.

 

[Maintenance Chief]

Hope the plating survived?

 

[Maintenance Chief]

I do have a "B" piston waiting for a home , but my only cylinder is an nos pm800 Q port.

 

[hacskaroly]

I'm not sure any 82cc McCulloch has ever made it to my hands unscathed.

Looks like a fun project!!

 

[Duke Thieroff]

@heimannm

Look what I found inside that 1-71 you sent awhile back...View attachment 447328

Hey guys, I haven't played with one of these for awhile, but I took it all the way down yesterday for a cleaning and a reseal. How/where should I locate the piston ring ends during reassembly?

 

[the 28inch mac man]

@heimannm

Look what I found inside that 1-71 you sent awhile back...View attachment 447328

What does the exhaust port look like? I would expect some work there too.

 

[Duke Thieroff]

 

[heimannm]

With the bridged exhaust, there are no locating pins for the ring ends so they will most likely migrate as the saw is running. I try to orient the ring ends away from the ports when assembling a saw like that, but I don't know how long they stay were you put them.

Mark

 

[the 28inch mac man]

View attachment 447423View attachment 447424View attachment 447425View attachment 447426View attachment 447427

That's some nice work. I port saws so I apritiate it. If I port one I think I would cut the exhaust port bridges and pin the piston, but that was nice work. That will be a fun saw. Good luck with it.

 

[Maintenance Chief]

 

[Maintenance Chief]

I think any illusion of saving this cylinder is out the window.good side of the piston?
the other side.

 

[Maintenance Chief]

Not sure what the confirmation was for "great compression " was ? But I have a different idea of what it is.
Would likely assume that with this ad I would at the very least be able to save the cylinder, you know what the old saying about "assuming " is though....

 

[the 28inch mac man]

View attachment 447455
Not sure what the confirmation was for "great compression " was ? But I have a different idea of what it is.
Would likely assume that with this ad I would at the very least be able to save the cylinder, you know what the old saying about "assuming " is though....

We got to find someone that can re-plate cylinders.

 

[Max the Mac Man]

We got to find someone that can re-plate cylinders.

I wish you the best with that. Been looking for 3 years now in both the US and Canada. US Chrome will do them again now but only in lots of 10 of the same cylinder and only if you have them blind bored before you send them. By the time you get done you are right at $400 in each cylinder door to door, maybe a bit more with shipping to the machinist, then the US Chrome WI, then to US Chrome in New England, then back to you.

 

[Max the Mac Man]

View attachment 447455
Not sure what the confirmation was for "great compression " was ? But I have a different idea of what it is.
Would likely assume that with this ad I would at the very least be able to save the cylinder, you know what the old saying about "assuming " is though....

Honestly I bought a PM 570 awhile back. Was told it ran, it did (not great) Told it had good compression (it did 155psi).After a carb kit and fuel line, it still ran like crap. I ended up tearing it all the way apart. Cylinder was flaking badly and top ring was broke. I was shocked it had that kind of compression in its poor state. It wasn't quite as bad as your 850 though. I look at buying used chrome jug saws now like gambling, sometimes you win sometimes you lose. I hope the next one is a winner!

 

[edju1958]

Gentlemen,did everyopne here forgeyt about our member @Vinnywv? He has a friend who has a machine shop who will bore out those 82cc cylinders & install an iron sleeve for a fraction of what U.S.Chrome wants to replate one.

 

[heimannm]

The first one I put together with a sleeved cylinder would run/cut for 90 seconds then die for lack of compression. Once it cooled off compression would come back up to 130+. Run another 90 seconds and die @ 90 PSI again.





I will put another together soon to see if that cylinder was a fluke, or if there is something inherently amiss with the sleeved cylinders.

Mark