O.S. 21XM VII Outboard Air Cooled Marine Engine 13941

This is the Air Cooled O.S. 21XM Outboard Marine Engine.


FEATURES: Designed expressly for small and medium size outboard boats Installed aluminum tilt transom mounting plate Preassembled outboard unit with flexible propeller Blue anodized aluminum heat sink head 42mm carbon fiber propeller 20J carburetor

INCLUDES: O.S. 21XM Version II Outboard Marine Engine, Muffler, Mounting Plate, #8 Glow Plug, Propeller, Outboard Unit, Steering Arm and Instructions

REQUIRES: Glow Fuel: 10-30% nitromethane content, use 20% for break-in Glow plug igniter, starting belt and shore equipment

SPECS:
Displacement: .21 cu in (3.5cc)
Bore: 0.654" (16.6mm)
Stroke: 0.630" (16mm)
Practical RPM: 3,000 - 25,000
Power Output: 1.3 PS, 1.28
HP @ 25,000RPM
Weight: 24oz (682g)

Carburetor Settings:
Needle Valve: 2.5 turns from fully closed
Mixture Control Valve: Shoulder portion exactly at a tangent to the throttle rotor hole

COMMENTS: This Engine STARTS AND RUNS IN A CLOCKWISE DIRECTION at the starter cone.
Any attempt to start engine in a counter-clockwise rotation may cause serious damage to the engine.
Because of the clockwise rotation, the crankshaft has reverse threads.