Description
Overview:
This crankshaft key (flywheel fixing) is a Genuine JAP part designed to secure the flywheel to the crankshaft on vintage JAP engines, ensuring accurate drive and timing. Made from durable steel with a precise profile, it fits the keyways used on JAP Model 5 and Model 6 engines for a tight, reliable interface that resists slippage under load. Ideal for restoration and maintenance of classic stationary engines often found in compactors, mixers, mowers, generators and pumps, it helps maintain correct ignition timing and protects mating components from wear. Supplied as unused old stock for authenticity, it may show light storage tarnish without affecting function. Manufacturer reference: MPN 16712/1 for easy identification against original JAP specifications.
Key Features:
- Genuine JAP part for correct fit and function on Model 5 and Model 6
- Steel construction for strength, wear resistance and long service life
- Positive flywheel retention to prevent slippage and timing drift
- Accurate keyway engagement helps protect crankshaft and flywheel slots
- Straightforward installation with basic hand tools on standard engines
- Unused old stock (NOS); minor storage marks possible, performance unaffected
- MPN 16712/1 for precise identification during rebuilds or parts matching
- Suitable for repairs after a sheared key incident or during full engine overhaul
- Maintains engine integrity by ensuring correct torque transmission through the hub
- Trusted solution for authentic restorations and routine servicing of vintage JAP units
Typical Applications:
Used when rebuilding or servicing JAP Model 5 and 6 engines to secure the flywheel, restore correct timing after a sheared key, recommission stored machinery, or complete authentic restorations. Common in heritage equipment such as compactors, concrete mixers, small generators, pumps and agricultural implements where dependable flywheel retention is required.
Also known as:
Engine key, flywheel key, crank key, timing key, woodruff key, half-moon key, crankshaft key, crankshaft locating key, flywheel fixing key, drive key.
Fits Models:
JAP Model 5, JAP Model 6
Alternate Part Numbers:
167121
