Clutch ID

Bob Alexander · Post by **Bob Alexander** » Tue Dec 30, 2025 12:01 pm

I found this clutch a while back, does anyone recognize it? It looks like a Mac taper inside.

REAR · Post by **REAR** » Wed Dec 31, 2025 7:23 am

Possible McCulloch saw with chain sprocket added to drum,

R.E.A.R.

Mark Loraine · Post by **Mark Loraine** » Thu Jan 01, 2026 11:36 am

The hub is a mercury with fiber-ed shoes. Robs call on the drum is most likely.

Bob Alexander · Post by **Bob Alexander** » Thu Jan 01, 2026 2:45 pm

Welded on sprocket is likely, that would explain the threaded set screw holes in the side.

Rob Voska · Post by **Rob Voska** » Thu Jan 08, 2026 6:32 am

3 1/2" were popular drum sizes. Many innerchanged. mark is Right Mercury Hillclimber clutch hub.
Great for a Clinton, 580 WB etc......