Kawasaki JS300 Engine Bottom End – Complete Short Block (Used)

Kawasaki JS300 Engine Bottom End / Short Block Assembly

Serial #: KJS300AE01479 | Engine: Kawasaki 300cc Single-Cylinder 2-Stroke

Complete bottom end pulled from a Kawasaki JS300 standup jet ski. Crankshaft and connecting rod are included and the engine turns over, though it feels a bit rough — likely due to bearing wear or surface corrosion from storage. A solid candidate for a rebuild or as a core exchange. Reed valve cage is present but reeds are not included.

• Serial Number: KJS300AE01479
• Compatible Model: Kawasaki JS300
• Includes: Crankcase, crankshaft, connecting rod, mounting brackets, reed valve cage (no reeds)
• Turns over: Yes – slightly rough
• Condition: Used – surface rust present, suitable for rebuild or core
• Approximate Weight: 20 lbs

Please verify fitment by serial number before purchasing. All sales final on salvage parts.