O.S. Engine OS4A408000 Crank Shaft Drive Washer - Engine Part [OS4A408000]

Price:

£5.94

Brand:

O.S. Engine

Model:

OS4A408000

GTIN:

4531028156784

Condition:

Brand New

Quantity:

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Description
FAQ

Drive spacer for engine crankshaft

This O.S. Engine drive washer is an RC crankshaft spacer intended to set and retain axial distance between rotating engine parts, helping preserve alignment. It is a small replacement or maintenance item used with crankshaft assemblies on compact nitro and glow model engines.

Installation is direct for those experienced in engine work: press the washer flush to the mating surface, confirm even seating around the circumference, and check axial play after closing the assembly. Its role in tuning is to maintain correct clearances so timing and throttle response remain repeatable during setup and running.

Which engines typically use this washer?

It is commonly used with small nitro and glow model engines that require precise axial spacing on their crankshaft assemblies.

What clearance should I verify after fitting?

After fitting, hand-rotate the crank to ensure smooth motion and check that axial play is minimal and within expected tolerance for your engine setup.