Replacement Crankcase OS27901000 for O.S. Engine 61SX-H, 61SX-HG, 61SX-HGL  [OS27901000]

O.S. ENGINES CRANKCASE 61SX-H,-HG,-HGL
Price:
£20.34
Brand:
O.S. Engine
Model:
OS27901000
Condition:
Brand New
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Crankcase specifics for the 61SX range

This crankcase is supplied as a replacement component for O.S. Engine 61SX-H, 61SX-HG and 61SX-HGL glow engines. It locates the crankshaft and oil seals, restoring mechanical alignment and the combustion chamber sealing that can be lost when the original housing is damaged or worn.

Replacement is commonly part of a full engine rebuild; inspect bearing bores, gasket seating faces and mating surfaces carefully. The product is a single housing intended to substitute a worn crankcase; check crankshaft axial play and seal compression during trial assembly before final tightening.

The crankcase itself does not alter engine timing, but ensuring correct internal alignment and sealing promotes consistent carburetion and ignition behavior, which helps when setting and maintaining tuning adjustments on glow-powered RC engines.

Specifications

  • Item: Crankcase
  • Material: Not specified
  • Model Number: OS27901000
  • Compatibility: 61SX-H, 61SX-HG, 61SX-HGL

Fit this crankcase to replace a defective housing or during a complete rebuild to reestablish correct alignment and sealing within the engine assembly.

How can I be sure OS27901000 is the correct part?

Confirm the engine model and compare mounting points and part numbers against the listing. If the engine is stamped or marked with a 61SX-H, 61SX-HG or 61SX-HGL identifier, OS27901000 is the specified crankcase replacement.

Is any additional hardware included with the crankcase?

The listing describes the crankcase housing only; bearings, seals and gaskets are not included and should be purchased separately as required by your rebuild procedure.

What are the main causes of crankcase failure?

Common causes include impact damage, severe bearing wear that scores the bore, and gasket face distortion. Inspect these areas during service to determine whether the housing needs replacement.

Will replacing the crankcase require retuning?

After restoring correct alignment and sealing, minor tuning adjustments may be required to re-establish optimal running, but the part itself does not directly change engine timing or tuning settings.

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