The BRP / OMC part number 0436254 (also written as 436254) is a genuine factory-original standard-size piston ring assembly (AY-STD). It maintains compression and controls oil distribution inside the powerhead cylinders.

New Old Stock (NOS) — genuine factory original part.

Fitment and Compatibility

This piston ring assembly is engineered for heavy-duty, big-block 2-stroke Johnson and Evinrude outboard engines:

• Horsepower Range: Primarily fits high-output 200 HP, 225 HP, and 250 HP V6 engine configurations.
• Production Eras: Extensively used in models manufactured during the mid-1990s, particularly between 1993 and 1995 (such as the E225PXERM, E225PZERM, and E225PZETF model blocks).

Important Technical Application Notes

• Standard Bore Size Only: The STD suffix indicates that this assembly is designed exclusively for original, factory-spec cylinder bores. If your engine blocks have been bored out over-size during a rebuild (e.g., +.020 or +.030 over), this part number will not fit or seal properly.
• Per-Piston Basis: This part number covers the ring set for one single piston. For a total V6 powerhead overhaul, you will need to order a quantity of six.

Cross-References & Equivalent Parts

Replaces OEM 0436254. Equivalent to the following aftermarket and OEM part numbers:

• 18-3901 – Sierra Marine
• REC436254 – Recmar Marine
• 778286 – Evinrude Johnson OMC BRP
• 9-54420 – Mallory Marine
• 24340 – GLM