O.S. Engine OS25803200 55HZ Replacement Piston for RC Engines  [OS25803200]

O.S. ENGINES PISTON 55HZ
Price:
CAD$27.80
Brand:
O.S. Engine
Model:
OS25803200
GTIN:
4531028144996
Condition:
Brand New
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Piston for model engines

This O.S. Engine OS25803200 piston is presented as a replacement component for use during model engine maintenance and routine tuning. The 55HZ marking identifies the specific piston variant intended to match the correct cylinder size.

In service the piston functions as the moving seal inside the cylinder and affects compression and throttle response. When carrying out maintenance check piston-to-cylinder clearance, inspect for scoring or uneven wear, and verify the part code before fitting. The focus here is fit and reliable function, not performance claims.

Installation notes: install the piston in line with the engine manufacturer's recommended service intervals and check the ring and skirt clearance. After fitting, complete an appropriate run-in sequence and confirm smooth rotation and steady idle as part of normal tuning. For exact fitment, cross-reference the OS25803200 code with your engine spare parts list or contact your supplier.

Specifications

  • Item: Piston
  • Model Number: OS25803200
  • Material: Not specified
  • Compatibility: Not specified

Before purchasing, confirm the OS25803200 piston variant and match it to your cylinder bore and engine model to ensure correct fit and dependable service.

How should I orient the piston when fitting it?

Fit the piston so any directional marks or skirt relief faces the direction recommended by your engine documentation. Ensure the ring gap aligns with the manufacturer's guidance and avoid forcing the piston into the bore.

What does the 55HZ marking indicate?

The 55HZ code denotes the piston variant within the product range. Use this designation to match the correct replacement piston to your engine's spare parts listing.

How do I verify piston-to-cylinder fit?

Measure piston skirt clearance with the recommended gauges and visually inspect for tight spots. Rotate the piston in the cylinder by hand before final assembly to confirm even contact and free movement.

What run-in steps are recommended after installation?

Perform a conservative run-in at low to moderate loads, monitor temperature, and listen for abnormal noises. Gradually increase operating conditions while checking compression and smoothness.

Is this piston suitable for performance upgrades?

This item is sold as a replacement piston. Any change in engine behavior depends on the entire setup rather than the piston alone, so treat it as a service part rather than a guaranteed upgrade.

Who can confirm fitment for my engine?

Refer to your engine manufacturer's spare parts list or contact your parts supplier with the OS25803200 model number to confirm compatibility with your cylinder bore and engine model.

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