MCCULLOCH The official McCulloch thread

[fossil]

This saw is frustrating me. I rebuilt a second Tilly this afternoon, this one is an HL63E. It is pretty much acting the same although I did get this one to actually run, it is starving for fuel. It will only run on choke even with the needles 3 turns out. If I didn't know better I would think the saw has a massive air leak. Not sure where to go from here. I've never had a problem with the hi speed check on one of these carbs, also seems weird that 2 of these carbs are acting similar. It is worth noting, I am only changing gaskets and diaphragms because those are the kits I have on hand. I also ordered a complete RK88HL kit that will be here tomorrow.

Sent from my SM-G981U using Tapatalk

Let me know how that goes Kevin. The 63G I have has the brass cartridge type main nozzle check valve. I knocked it out and it fine. I'm leaning to a carb kit issue as well. I am wondering if the short barrel metering needle seat is an issue.
The original was a long one.

 

[heimannm]

Bob Johnson is making gaskets & diaphragms for the MAC carburetors and rivets the plate to the metering diaphragm.

I bought some nitrile cover nylon (the material used to make the metering diaphragms and some fuel pump diaphragms) from American Rubber. I found the "Teflon" diaphragm material from an outfit called Rt21 Trading. At this time I have sent some along to Brian Genrich who is working to duplicate the gaskets and diaphragms for the BP-1 carburetors. Once that one is done I may work with Brian on other hard to find parts like the two man saw diaphragms.

Mark

 

[Al Smith]

I went to the Henkel data sheet and according to that Loctite 401 shows 100 percent strength after 1000 hours exposure of both gasoline and ethanol .Because I've had a number of problem with the carb on that concrete saw I know I've had that intake boot off and on at least a dozen times and it is holding just like it was never repaired . Fact I have a new boot I bought in case the experiment didn't work and side by side you can't tell where I glued it together .
I've got an old Sears gear drive that had sat under a pine tree near Meadville Pa for about a decade .It's got an AH 58 Power Products engine that has a Lauson carb .It's a freak ,uses actual duck bill check valves not the usual flapper types a Tilly uses .When I get to it I'll have to make all the components to rebuild that carb .When that day comes I might try this for the diaphragm as well as perhaps the flatty on the Mac super 250 .If this fellow can make rebuild kits my guess is about anybody could with enough grit to hang in there until it works .

 

[u235]

Got this running yesterday. Yes I know the handle is tweaked LOL.
Saw blew 140 but never ran rite. Tore it down a few weeks ago and found all of the chrome below the exhaust port gone and really heavy wear on the intake side of the piston. Saw behaved well, but could not keep up with a decent 10-10, just had no power.
It got a NOS piston, new crank seals and a good used cylinder. I cleaned up and widened the exhaust port a hair and port matched the muffler. The casting was kinda rough on the new cyl, but the chrome was good. Got a repaint and new decals while I was waiting on parts. Wish I did not have to use the only new piston I had, but the old one was trashed. From the compression readings and the way it felt I did not suspect the amount of damage I found.

Running it rich and being easy on it for the first tank or 2, but can already tell it has way more power than before. Cut on a big beetle kill pine yesterday with it and it performed well. First healthy 70cc Mac I have ran.

 

[Al Smith]

It's not unusual for heavy wear on the intake side because they have lousy air filters .Fact often ran with no filter what so ever .

 

[mgr1]

Can buy some mcculloch parts lot. I need only the pro mac 5200 project in this lot.
Is there a market for the other parts?

Partnr
60932
93503
94130
94135
94143
88808

 

[u235]

Yeah,my friend and I bought about 15 of these saws from an individual. None of them were really taken care of. I just cut some more with it and took a compression reading. Only blows 145 but has 3 times the grunt. It is really running good, can feel more power as it loosens up. I really enjoy cutting with these old girls, just glad I could bring another one back to life. Next project is a pro mac 1010 that I hope to find in decent shape when I tear it down. It runs pretty well so I'm hoping.

The bearings on the piston for the 700 were all purple and burnt looking. I wonder if it was strait gassed?

Sent from my SM-G960U1 using Tapatalk

 

[Simpsonsawshop]

So a little update on the Super 250. I got about an hour this evening to mess with it. It either has a giant air leak or my test equipment is faulty lol. I can pump about 5psi with my mighty vac if pump as fast as I can but it won't hold at all. I sprayed both crank seals, the intake gaskets the best could, and the stuffer and I could not find any leaks....... I may resort to hooking it up to regulates shop air and dunking in a bucket lol. I also found the spark plug threads are quite boogered up, the plug seems to tighten but I think I may just pull this saw down all the way and totally go through it. Is there anyone remaking gasket sets for these like they are for 10 series saws?

Sent from my SM-G981U using Tapatalk

Sent from my SM-G981U using Tapatalk

 

[Maintenance Chief]

So a little update on the Super 250. I got about an hour this evening to mess with it. It either has a giant air leak or my test equipment is faulty lol. I can pump about 5psi with my mighty vac if pump as fast as I can but it won't hold at all. I sprayed both crank seals, the intake gaskets the best could, and the stuffer and I could not find any leaks....... I may resort to hooking it up to regulates shop air and dunking in a bucket lol. I also found the spark plug threads are quite boogered up, the plug seems to tighten but I think I may just pull this saw down all the way and totally go through it. Is there anyone remaking gasket sets for these like they are for 10 series saws?

Sent from my SM-G981U using Tapatalk

Sent from my SM-G981U using Tapatalk

Bob J. Had a good leak test he shared with me, get a drinking straw and some putty and put the straw down the carb throat and pack putty around it. Light up a big cigar and blow some clouds down the carb ! He told me he's found lots of case leaks that way and its easier for him to see smoke then tiny bubbles.

 

[Maintenance Chief]

Yeah,my friend and I bought about 15 of these saws from an individual. None of them were really taken care of. I just cut some more with it and took a compression reading. Only blows 145 but has 3 times the grunt. It is really running good, can feel more power as it loosens up. I really enjoy cutting with these old girls, just glad I could bring another one back to life. Next project is a pro mac 1010 that I hope to find in decent shape when I tear it down. It runs pretty well so I'm hoping.

The bearings on the piston for the 700 were all purple and burnt looking. I wonder if it was strait gassed? View attachment 280393

Sent from my SM-G960U1 using Tapatalk

I love the 700s and the 10 series saws , usually they take all kinds of abuse (not strait gas though) .
A few things why your going through your restorations , the buna/rubber fuel tank gasket is awesome and air filters are readily available .
What models did you end up with?

 

[Maintenance Chief]

Here's a one owner 10-10 I picked up about a year ago, hardware store owner had it for 30 years, he did a fairly decent job of taking care of it.
24" bar full comp homelite 38 chain.

 

[u235]

I love the 700s and the 10 series saws , usually they take all kinds of abuse (not strait gas though) .
A few things why your going through your restorations , the buna/rubber fuel tank gasket is awesome and air filters are readily available .
What models did you end up with?

An 800 super, a 1010s, 2 promac 700s, 4 promac 1010s, 1 right hand start 1010, 2 or 3 1010a, and a half dozen various black top 1010 saws. My friend wanted the 800 and the 1010s. Both of them were super clean, but the 1010s needed work. The 700 he kept runs strong, but the one he gave me was beat...pretty suspicious lol. I cherrypicked a promac 1010 that looked like it hadnt been fooled with. Still had packing peanuts stuck in the bottom of it, so I think it was an ebay purchase the guy had not fooled with. I wanted one that had not been "fixed" before. Most of the saws were a nightmare really. They had the wrong carbs and all kind of problems. Finally getting some of the issues sorted out.

 

[Al Smith]

The classic look for case leaks happened some time ago .Brian Wright AKA Timberwolf could not find a case leak so he shipped it off to E Copsey who plugged every thing off and attached an air hose to it and threw in in a wash tube full of water .Sure enough found it .Bubbles you know .Soap suds is another method .I used that method to find a leak on my car hoist I had to nearly stand on my head to make the last weld on the sced. 80 pipe carrying the oil to the cylinder .Two more passes with 7018 and it held 100 PSI for three days so I figured that was good enough .

 

[PogoInTheWoods]

Using a compressor regulated down to around 10psi will usually find a large leak just by ear..., provided the compressor isn't cycling, of course. Always have a case under constant pressure (not pumping a MityVac real fast thinking that'll work) with a compressor when submerging to find elusive leaks. That's only common sense unless you plan on splitting the case and replacing the bearings anyway.

 

[Simpsonsawshop]

Using a compressor regulated down to around 10psi will usually find a large leak just by ear..., provided the compressor isn't cycling, of course. Always have a case under constant pressure (not pumping a MityVac real fast thinking that'll work) with a compressor when submerging to find elusive leaks. That's only common sense unless you plan on splitting the case and replacing the bearings anyway.

I think I am going to end up pulling this down totally anyway and revealing it and possibly put rings in it.

Sent from my SM-G981U using Tapatalk

 

[Simpsonsawshop]

Does anyone know a good source for gaskets for these? Or know the thicknesses so I can make appropriate ones? I would kinda rather just buy them honestly lol.

Sent from my SM-G981U using Tapatalk

 

[jacob j.]

Does anyone know a good source for gaskets for these? Or know the thicknesses so I can make appropriate ones? I would kinda rather just buy them honestly lol.

Sent from my SM-G981U using Tapatalk

There's an Ebay seller, 310dawg, that has some gaskets. I've bought a few things from them, like replacement reeds for some of the specialty manifolds, and they've been pretty good.

Otherwise, I just buy that Felpro Karropak gasket material by the roll at NAPA. I think it's about .020". Some Autozone stores sell a high-heat gasket material that's about 2mm thick
which is suitable for exhaust gaskets and shields on some of the McCulloch saws.

 

[Simpsonsawshop]

Ya, I have the felpro stuff on hand in a couple different thicknesses, I was just hoping somebody would be like "oh ya, xyz ebay seller has repop gasket sets" because I'm feeling lazy lol.

Sent from my SM-G981U using Tapatalk

 

[jacob j.]

Ya, I have the felpro stuff on hand in a couple different thicknesses, I was just hoping somebody would be like "oh ya, xyz ebay seller has repop gasket sets" because I'm feeling lazy lol.

Sent from my SM-G981U using Tapatalk

You might try ordering what you can through M & D Mower. I ordered $400 worth of 125 parts and I was expecting bupkus but they delivered on almost all of it.

 

[PogoInTheWoods]

Bob Johnson is one of their McCulloch suppliers.