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

O.S. ENGINES CAM SHAFT FSa-155
Price:
CAD$38.46
Brand:
O.S. Engine
Model:
OS42562000
GTIN:
4531028148031
Condition:
Brand New
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FS series cam shaft overview

This cam shaft is a direct service replacement identified by the FSa-155 designation and designed for FS series engines manufactured by O.S. Engine. It controls valve timing in nitro RC engine assemblies and is supplied as a spare component for routine maintenance or performance refresh jobs.

Typical installation requires removal of the engine head and associated timing components to access the cam shaft journal, alignment of timing marks, and verification of valve timing through run-in checks; follow correct tooling and careful technique to prevent damage to nearby parts.

From a tuning perspective, the cam shaft alters valve timing characteristics that interact with needle settings and carburetor tuning on nitro RC models; after fitting, verify timing and perform measured adjustments while monitoring run quality and temperature to dial in the desired response.

Specifications

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

Use this cam shaft when restoring valve timing during engine rebuilds or replacing worn timing components, and follow standard FS engine service procedures for best results.

How can I confirm this part fits my FS engine?

Compare the FSa-155 designation and OS42562000 model number with the part list in your engine service manual; visual comparison of mounting faces and journal sizes will also help confirm fitment.

What are the main steps to replace the cam shaft?

Remove the head, drain fuel if needed, take off timing components, extract the cam shaft, and install the FSa-155 while aligning timing marks; reassemble and check clearances and timing before test runs.

Will I need to change needle settings after installation?

Yes, valve timing affects mixture and response; perform incremental needle adjustments and short run checks to stabilise mixture and engine temperature after fitting the OS42562000 cam shaft.

What signs suggest the cam shaft is worn?

Symptoms include rough idle, reduced top-end power, and visible scoring or play on inspection; these are common triggers for replacing timing components like the FSa-155.

Can I reuse my old timing parts when fitting this cam shaft?

Inspect all timing parts closely and replace any worn items; reusing undamaged components is possible, but replacing worn mates will ensure consistent timing and longevity.

What break-in routine do you recommend after fitting the cam shaft?

Carry out short, incremental run-in sessions, monitor engine temperature and response, and make gradual tuning adjustments until the running becomes consistent and temperatures stabilise.

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