O.S. Motors OSMG8036 28009002 Prop Washer .61-.90

O.S. Motors OSMG8036 28009002 Prop Washer .61-.90 is a factory replacement propeller washer for O.S. glow engines in the .61 to .90 displacement range. This precision-machined metal washer seats between the propeller and engine crankshaft, ensuring secure prop retention and proper thrust alignment.

Key Features

• Factory O.S. replacement prop washer for .61–.90 class engines
• Precision-machined for accurate fitment and secure prop seating
• Ensures proper thrust alignment and reduces vibration
• Direct drop-in replacement — no modification required

Compatibility

• O.S. glow engines in the .61–.90 displacement range
• Verify part number 28009002 against your engine’s parts diagram before ordering

Specifications