O.S. Engine OS44303200 Service Piston OS44303200 for FSa-72  [OS44303200]

O.S. ENGINES PISTON FSa-72
Price:
£14.18
Brand:
O.S. Engine
Model:
OS44303200
GTIN:
4531028144132
Condition:
Brand New
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O.S. Engine service piston OS44303200

This piston is supplied as a replacement for O.S. Engine units identified by the FSa-72 code and is intended for use in glow-engine maintenance and repair. Confirm model compatibility before fitting to avoid misfit issues.

Use the piston when renewing compression, swapping worn internal parts, or carrying out a focused engine refresh. It functions as the sealing and reciprocating element and will influence compression, ring seating, and the engine's running character; ensure bore and ring condition match the service requirements.

Installation should follow standard engine disassembly practices, with emphasis on cleanliness, correct ring orientation, and lubrication during break-in. Rely on the engine's service manual for specific measurements and torque figures rather than general advice.

Specifications

  • Item Piston
  • Material Not specified by manufacturer
  • Model Number OS44303200
  • Compatibility For O.S. Engine models, refer to manufacturer fitment chart

This OEM piston part is intended for technicians and hobbyists performing maintenance or repairs on compatible O.S. Engine glow engines; always check fitment data before purchase.

Which specific O.S. models list OS44303200 on their parts list?

Refer to the official O.S. Engine parts catalog or fitment chart to determine exact model matches; compatibility is driven by model code and bore dimensions rather than general series names.

Will fitting a new piston require re-jetting or tuning?

Potentially. A fresh piston can alter compression and sealing behavior, which may change running characteristics; carry out careful test runs and adjust needle and idle as necessary to restore expected performance.

Are there compatibility pitfalls to be aware of?

Yes. Confirm bore size, ring profile, and any service updates from the manufacturer. Do not assume fit across different engine generations without checking official fitment documentation.

How should I verify sealing and compression after install?

Conduct a controlled run-in, then perform a compression check and inspect for blow-by or oil leaks. If compression is below spec, recheck ring seating and cylinder condition per the service manual.

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