O.S. Engine OS29088200 Carburettor Rotor Replacement Part for O.S. Engine Models  [OS29088200]

O.S. ENGINES CARBURETTOR ROTER 61E-R 91HZ-R
Price:
AUD$20.62
Brand:
O.S. Engine
Model:
OS29088200
GTIN:
4531028146532
Condition:
Brand New
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Overview of rotor mechanics

This rotor is an RC-scale component intended for installation inside O.S. Engine carburettor assemblies. It is described here as a replacement or spare used in maintenance, tuning, and routine overhaul of nitro model engines.

The rotor's mechanical action impacts throttle response and idle behaviour through precise seating and rotational freedom. When fitting a replacement rotor, ensure it is seated correctly in the carburettor body and that rotation remains smooth to maintain steady fuel metering.

Fitting notes: remove the carburettor following the engine manufacturer's service procedure, examine seals and needle seats for wear, fit the rotor aligning it properly, and perform bench checks to confirm free movement and correct interaction with the needle. After refitting, carry out a controlled run-in and adjust needles as required to restore expected idle and mid-range performance.

What signs indicate rotor wear or failure?

Look for scoring in the carburettor bore, uneven rotation, or degraded idle quality; any binding or play in the rotor suggests it should be replaced to avoid erratic fuel metering.

How should I inspect the rotor during service?

Remove the rotor and visually inspect the bore and needle seat, check for debris and smooth rotation, and confirm there is no excessive side play before reinstalling the unit.

Engine runs rough after fitting the rotor, what next?

Reconfirm correct seating and free rotation, recheck needle settings, and perform a brief run-in on the bench to settle the rotor and re-establish stable idle and mid-range response.

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