Cam Shaft for FS Engines FSa-155 - OS42562000 compatible with FS series by O.S. Engine  [OS42562000]

O.S. ENGINES CAM SHAFT FSa-155
Price:
AUD$39.23
Brand:
O.S. Engine
Model:
OS42562000
GTIN:
4531028148031
Condition:
Brand New
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Cam shaft role and tuning impact

The FSa-155 cam shaft is an RC engine replacement component from O.S. Engine for FS series models, responsible for setting valve timing in nitro power units. It is intended as a service spare to restore correct timing or to support tuning changes that alter engine characteristics.

Installation normally involves removing the head and associated timing components to access the cam shaft; align timing marks accurately and verify valve timing during controlled run-in to avoid undue stress on related parts.

In tuning scenarios, changes to cam timing will influence the engine's mixture needs and throttle behavior; after installing the OS42562000 cam shaft, perform progressive needle and carburetor adjustments while monitoring temperatures and response to achieve the intended power delivery.

Specifications

  • Item: Cam shaft FSa-155
  • Model Number: OS42562000
  • Brand: O.S. Engine
  • Compatibility: FS engine series

Choose this cam shaft when rebuilding or tuning FS engines to restore or modify valve timing, and follow established FS service techniques for reliable results.

How does changing the cam shaft change engine behaviour?

Altering cam timing modifies valve opening and closing events, which shifts the powerband and can require richer or leaner needle settings to maintain smooth running and correct temperatures.

Is special tuning required immediately after installation?

Yes; carry out short runs and fine-tune needle adjustments in small steps, watching for consistent temperature and throttle response as the engine settles.

Will this part work across all FS variants?

The FSa-155 is listed for FS series engines; verify the OS42562000 part number against your model's service documentation to confirm compatibility before fitting.

What maintenance should follow cam shaft replacement?

After installation, recheck valve timing, torque settings, and perform progressive run-ins while monitoring for abnormal noise or temperature spikes that could indicate incorrect assembly.

Are there common mistakes to avoid when fitting the FSa-155?

Avoid misaligned timing marks, over-tightening fasteners, and neglecting to inspect bearings and seals; these oversights can lead to performance loss or premature failure.

What break-in advice improves long-term performance?

Use incremental break-in runs, monitor peak and idle temperatures, and make conservative tuning changes until the engine shows stable, repeatable performance.

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