O.S. Engine OS45561010 Precision Rocker Arm Assembly for FS-120S, S-II, S-E, S-SP, FT-300  [OS45561010]

O.S. ENGINES ROCKER ARM ASSEMBLY FS-120S,S-II,S-E,S-SP,FT-300
Price:
£11.73
Brand:
O.S. Engine
Model:
OS45561010
GTIN:
4531028123519
Condition:
Brand New
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Service replacement rocker for FS engine models

This rocker arm assembly is an RC replacement part specified by the manufacturer for the FS-series engines listed. It forms the valve actuation linkage inside the cylinder head and restores correct geometry when worn or damaged components affect valve timing.

Compatibility is limited to the models named in the product title; confirm the OS45561010 model number against your engine before ordering. During any engine service check clearances and ensure all fastenings are secure on reassembly to maintain reliable engine behaviour at model power outputs.

Because the rocker arm affects valve timing and throttle response, verify rocker alignment and rocker-to-valve clearance during tune-ups or after replacing the assembly to keep the engine performing as intended in RC use.

Specifications

  • Item: Rocker Arm Assembly
  • Material: Not specified by manufacturer
  • Model Number: OS45561010
  • Compatibility: FS-120S, S-II, S-E, S-SP, FT-300

Opt for this genuine replacement to rebuild valve linkage on compatible FS-series engines and follow routine reassembly inspections to ensure correct clearance and secure mounting.

How can I confirm this part fits my engine serial?

Match the engine model against the compatibility list in the title and verify the part number OS45561010. If in doubt, supply engine details to an authorised dealer for a definitive check.

Are there recommended inspection intervals for the rocker arm?

Inspect the rocker during routine valve checks or after any unusual symptoms such as rattling or variable valve lash. Replace the assembly when wear affects valve timing or clearance cannot be corrected.

Does this part have cross-reference numbers for other suppliers?

Only the manufacturer's model number OS45561010 is provided here. For cross-references consult an authorised dealer or the manufacturer's parts documentation to find equivalent listings from other suppliers.

What wear signs should prompt immediate replacement?

Immediate replacement is advised if you detect scoring, bending, excessive play, or inconsistent valve motion that cannot be corrected by adjustment, to prevent further engine damage.

Who provides warranty or technical help for this part?

For warranty enquiries and technical support contact your authorised O.S. Engine dealer or the manufacturer's official support channels; they can advise on replacement and service options.

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