Crankshaft clamp for OS 91/105HZ engines

Crankshaft clamp needed to lock the shaft of RC nitro engines when tightening up the clutch nut.

This one fits O.S. engines: GT15, 105HZ, 91HZ / SZ / RZ (including R versions, i.e. HZ-R).

Replacement for genuine O.S. crankshaft clamp part number 71530530.

Print with 100% infill for maximum strength. Use any filament that can deal with RC nitro fuel (ABS, PETG, Nylon are confirmed to be working well).