Chainsaw Repair

There's many large frame Homelites such as the C-series (and the XP-series saws without auto oilers).  They have a RH thread nut on the end of the crank to hold the clutch drum and washers on......................and a LH threaded section for the clutch hub.

The Homelite Super 2100 (and the Pioneer P-60 through P-62, Pioneer/Partner P-65, and PoulanPro 655) have a spllined crank snout and clutch hub and a RH thread nut.

Many old Macs have a RH thread nut and a tapered crank snout with a key.   Some Mac Kart engines have a LH threaded nut instead. 

Some old Macs have a clutch hub that's threaded on a LH threaded crank snout.