McCullocutter
Professional Amateur Hooligan
Anyone know how to properly set the metering lever and needle on a Mac 110 Zama carb?
McCulloch Chain Saws
- Thread starter Bruce Hopf
- Start date
Help Support Arborist Forum:
Thanks Guys for the input on sprockets. I have not tried to get sprockets for my old Macs but on my Canadien it's a one piece drum / sprocket, and parts are HARD to find. Since there's more activity on this forum I was curious what had been seen running work sprockets.
ML12
ArboristSite Guru
Macs are much, much easier to get parts for than the Canadiens. A ton of the clutch parts interchange across lots of models so it makes it pretty easy.
I've run my fair share of worn sprockets and new chains etc, and yeah, sure it causes a bit of premature wear, but i'm not production cutting so it doesn't bother me much. Obviously I do change out sprockets when they get bad, but so far the only one i'm worried about is the one on my milling saw. I don't see a lot of 090 spline drive drums around.
Thanks for the input!
On dirtbikes / ATVs you would never run a shot chain on new sprockets, but you could run a new chain on worn sprockets. Essentially because it was the chain that elongated (stretch was a misnomer) and would wipe out new sprockets. I don't completely understand why a worn chainsaw sprocket will ruin a new chain, but it looks as though it will actually gouge into the sideplates.
Correct the drive link drops down on the spur or rim face , basically hammering the chain off the link and surface with every rotation ., I've seen a rim nearly worn in 2 by a chain and the drive links were marring the spline drive!
I'm not sure which rims or spurs are the best quality material as far as the name brands but I'd like to cryogenically treat one some day to get some more use out of one.
Oh buy the way after your drive links have dropped down and are smashing against the flats the drive link tail starts to get alittle flat on the face of it which gets drug through your bar rail and the bar gets hot and cooks oil and screws the guage width of the bar , I've seen it totally blue and screw a new bar in a month of infrequent use , state workers an experiment in longevity!
I have a couple of new clutch drums that will fit the 270 or 275 Canadien saws.
This is a badly worn spur
This is a badly worn rim sprocket.
And this is a broken nose sprocket.
I was running the SP125 today when the chain stopped moving, I now know why.
Mark
This is a badly worn spur
This is a badly worn rim sprocket.
And this is a broken nose sprocket.
I was running the SP125 today when the chain stopped moving, I now know why.
Mark
I've never seen a rim worn that badly before.I do have a bar that was on a Homelite Super Mini that looked like they were using it to dig dirt with.I don't even know why they bothered shipping it with the saw.Lol
Zama metering lever setting.
Well I have my sp81 torn apart to find air leak. Good news is that the carb boot is good....the really bad news is that I can see the flywheel side seal moving back and forth as I spin motor over. Ugh! I'm guess that means the bearing is moving back and forth too?
Could be 1-10 or 2-10 , definitely not a 10-10
Any idea how to find a carburetor kit to rebuild this old style carb? I did some looking around and it sounds like they are a “bullfrog”. Are there different styles of these types of carb or are they universal?
Not a lot of love on here for the Mac bullfrog carb. Most will tell you to swap to a walbro sdc. I've got both a 1-10 and a 2-10 and I'm gonna try and make them run with the bullfrog carbs. My 2-10 does pop over and try to run but diaphragm is hard. Diaphragms are available on eBay, full kits are a little harder to come by. This is my 2-10, I'd say yours looks similar. I don't believe the 1-10 has an auto oiler so can look in oil tank and see if there is a pump.
Yup I would agree that they certainly do look very similar. I’ll check for the oiler. Thanks for the tips.
I think I will try to get this saw running with the carb that’s in it. Not really interested in investing a lot of time or money. The saw was a cheap pick up and a good opportunity to dip my toe in the Mcculloch pool.
I think I will try to get this saw running with the carb that’s in it. Not really interested in investing a lot of time or money. The saw was a cheap pick up and a good opportunity to dip my toe in the Mcculloch pool.
As I understand it there arer something like 14 (or 24) steps to just trying to tune the bullfrog.Mark Heimann is the guy to talk to about the bullfrog.Bob Johnson has the conversion kits to change to a Walbro SDC,but the last I knew they were over $100.
Well.....both of those options sound terrible....this saw is sounding like It’s getting pushed to the back off the line or a good rainy day fix if I ever get caught up with other project saws.
emf123
ArboristSite Operative
- Joined
- Mar 27, 2014
- Messages
- 167
- Reaction score
- 314
What kind of bar is that? Certainly not a McCulloch or Oregon............. just saying
Eric
Pretty sure its a rebadged Windsor sprocket nose from mid-late 70's.I have several from 20" to 36"
Well you never know. It's funny seems like guys have terrible luck with bullfrog carbs on 10 series Macs. However, I've had a few on large frame Macs, including the 380 I have right now that runs flawless without even opening it up. The primer even works mint and doesn't leak. Of course the design on the large frame Macs is a bit different and looks a bit more robust.
