McCulloch Chain Saws

[leeha]

Bob's Lawnmower in Maryland Ny. has them as well. I'm sure for
much less since I have bought them before. I don't have his #
handy but if you can't find it I will get it for you.

 

[heimannm]

Bob Johnson 607 638 9297

He was selling the duck bill for $6 last time I needed some.

You can buy them directly from Elder Rubber in Texas but you must buy a larger quantity (minimum 20 pieces?) to get them directly.

Mark

 

[hseII]

4900. 77 cc version of the big counter vibes. I understand they run with a 5200 up to a 30" bar.

What size bar(s) are you bringing to the NY GTG for the MACs?

28” & 32” Sir.

 

[fossil]

I picked up a 10-10 last weekend. The RH starter is a mess and I haven't got to it to see if its salvagble.

Anyway, I swapped out the flywheel with a LH start flywheel. The saw is chipped. I kind of though it would go even though the magnet polarity on the flywheel is reversed from the one it came with.

Fired up pretty well.

 

[Walter Glover]

Will that be the same duckbill as in the 1-52?

 

[heimannm]

All of the large frame saws from say the 200 and later use the same duck bill valve in the fuel cap, 53766. Earlier saws either didn't have a vent in the cap, or some older saws had a really unique oversize check valve, and a few had a very complicated vent/check system with a disc.



The 10 Series flywheels are the same for LH or RH start saws, only difference is RH start saw flywheel does not have the pawls for the starter since they are on the clutch...or were just trying to pull our leg(s)?

Mark

 

[Walter Glover]

Thanks Mark

 

[fossil]

The 10 Series flywheels are the same for LH or RH start saws, only difference is RH start saw flywheel does not have the pawls for the starter since they are on the clutch...or were just trying to pull our leg(s)?

Mark

The flywheel I put on is larger in diameter than the RH start model. Also the magnet polarity is reversed. Checked the magnets with an compass. The size difference surprised me as well. The LH start flywheel is from a 600014E unless someone changed the tank in the past. The RH model is old and just has numbers stamped on the bottom of the crankcase. 9473
B10

LH Start FW Dia 4.40"
RH Start FW Dia 4.07"

I can take some pics if you like. There was just enough room in the lamination slots to get clearance to the flywheel.

 

[fossil]

Here a quick vid of it firing up. Checking to see if the timing was reasonable with the flywheel swap and the chip. I believe the starter cord is from an old venetian blind.

Also showing off my new Huztl chainsaw safety boots.

 

[heimannm]

I'd like to see the comparison Tim, always good to learn something new. I have seen a few 10 Series flywheels and they only ones I thought were actually different were the 18 fin on the PM800 and later (fins are taller) and the odd ball used on the electric start saws with the windings. The 12 and 20 fin versions (20 on the PM850, 12 on everything else) always seemed to be the same dimensionally.



Mark

 

[fossil]

I'd like to see the comparison Tim, always good to learn something new. I have seen a few 10 Series flywheels and they only ones I thought were actually different were the 18 fin on the PM800 and later (fins are taller) and the odd ball used on the electric start saws with the windings. The 12 and 20 fin versions (20 on the PM850, 12 on everything else) always seemed to be the same dimensionally.

View attachment 644487

Mark

What diameter are the ones you have there?

They are both 1-5/16" (high, thick, wide)

 

[Walter Glover]

Force gauge for dyno

 

[Brian Thacker]

Did you build that? I am working on building a dyno.
Brian

 

[Walter Glover]

Yes I did Brian. Posted in wrong forum but maybe not haha
Made so a six inch torque arm at 10 ft lbs makes 100psi

 

[hseII]

I'd like to see the comparison Tim, always good to learn something new. I have seen a few 10 Series flywheels and they only ones I thought were actually different were the 18 fin on the PM800 and later (fins are taller) and the odd ball used on the electric start saws with the windings. The 12 and 20 fin versions (20 on the PM850, 12 on everything else) always seemed to be the same dimensionally.

View attachment 644487

Mark

Again,

Thank You.

 

[heimannm]

I have 12, 18, and 20 fin flywheels on the bench right now. I will try to remember and get some more photos tonight for a better comparison. I believe I should have investigated further before making such brash statements.

These are the 18 and 20 fin variety.





Mark

 

[Walter Glover]

Points setting on ProMac 55

Final setting got the correct timing

 

[heimannm]

I have more photos of 10 Series flywheels, I will post them up tomorrow evening.

And in the interest of full disclosure, I made another mistake...flywheels have 12, 18, or 24 fins.

Mark

 

[heimannm]

I will never, ever, ever, ever doubt Mr. Tim Fossil again. I always assumed the 10 Series flywheels were like the large frame saws, the RH start are the same except without the pawls but I've been wrong about that all the time.

RH start flywheel is smaller in diameter and has opposite magnet polarity from the others, the magnets are actually stuck together in the photo below.



The RH and LH start saws (except for the 82 cc models) are 12 fin. The PM850 were 24 fin, and the PM800, 805, DE80, and PM8200 were all the 18 fin version with the taller fins.

Mark

 

[rwoods]

MAC always seems to toss a curveball just when you think you got them figured out. Ron