McCulloch Chain Saws

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Mr. Bow Saw

Mr. Bow Saw

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Jun 15, 2009
Messages
9,551
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CA.
FarmCrest, Super 250.

I got this saw years ago, Never looked at the numbers stamped it to the crankcase until today.:biggrin: #62481 same as one of my Super 250's I checked.
When I got the saw the flywheel cover was replaced, It was yellow. The starter was original light blue. I painted it with the only blue I had at the time.

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ozflea

ozflea

Good ol' BP Zoom 25-1
Joined
Dec 9, 2004
Messages
3,881
Location
NSW or is it QLD .. Australia
FarmCrest, Super 250.

I got this saw years ago, Never looked at the numbers stamped it to the crankcase until today.:biggrin: #62481 same as one of my Super 250's I checked.
When I got the saw the flywheel cover was replaced, It was yellow. The starter was original light blue. I painted it with the only blue I had at the time.

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I wonder was Farmcrest related to Walmart but for farmers
 
torinocobra

torinocobra

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Jun 13, 2009
Messages
267
Location
Yamhill, Oregon
Super 250 carb usage

Going thru the 1970 mc carb usage guide SI-29 trying to figure out some carb swap ideas for the super 250. 84050 is the Mac-1 carb used on the s250 and the s550. It has a .687" Venturi. The HL63G was used and it has a .688" Venturi. But at the back of the guide it lists a 68752 Mac carb for the 550/660/795/797. It has the air filter stud for the 550/660, so it could work in the s250. If it has the flow for a 797, than this could be a good carb to use. Anybody have anymore info on it. I have the scanned copy from Bob, I can't tell if any more info has been cut off the bottom of the page, but part numbers would help. It only describes the carb as a service replacement for these models. Thanks.
 
mini mac man

mini mac man

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Oct 31, 2012
Messages
72
Location
SD
Funny I was wondering almost the same thing last night. I am not much of a fan of the flat back carb.
Can anyone tell what the Venturi size of hl 87 c from a 1-51
 
mini mac man

mini mac man

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Oct 31, 2012
Messages
72
Location
SD
I believe that all of the Tillotson HL carburetors except for the 272 used on the 940 and Welder were the same; .687" venturi and .812" throttle bore.

The 272 has a .875" venturi and 1.000" throttle bore.

Mark
Mark
Thanks for the info.
I am going to convert to the tillotson.


Bill
 

cpr

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Mar 10, 2008
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Smiths Creek, MI
I believe that all of the Tillotson HL carburetors except for the 272 used on the 940 and Welder were the same; .687" venturi and .812" throttle bore.

The 272 has a .875" venturi and 1.000" throttle bore.

Mark

That's how I remember it. Only the 48890 flatback is a bigger bore. I have one on the MC-91/790 and it works well wide open, but idle is a pain. A bit too big as it sits in the saw. A straighter shot at the reeds or on a v4, it might be fine, but the turns in the intake stream weaken the signal a little bit too much at idle.
 

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