Smart boaters fix it right the first time. This factory PISTON ASSEMBLY ensures professional results even for DIY installation – we’ll help verify it’s the right part.

Factory-built to exact Mercury Marine specifications, this component ensures reliable operation across all engine RPM ranges. Part number 878413A1 is manufactured to exact Mercury Marine factory specifications for precision installation and optimal performance. Constructed from premium marine-grade materials designed to withstand harsh saltwater and freshwater environments.

Cut-rate alternatives might look similar, but they’re not engineered to Mercury’s exacting standards. Part 878413A1 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 110-150HP MARINER, MERCURY (VERADO)

• Fits MARINER, MERCURY 110-150HP engines
• Compatible HP: 110HP, 135HP, 140HP, 150HP
• Model types: VERADO
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

110HP Models

• 110HP JET (Mercury)

135HP Models

• 135HP VERADO (Mariner): 0P419487-0P464487, 0P464488-0P514868, 1B227000-1B381711, 1B381712-1B517158
• 135HP VERADO (Mercury): 0P419487-0P464487, 0P464488-0P514868, 1B2270001-1B381711, 1B381712-1B517158

140HP Models

• 140HP JET (Mariner): 0G960500-0T178499
• 140HP JET (Mercury): 0G960500-0T178499

150HP Models

• 150HP OUTBOARD (Mercury)
• 150HP VERADO (Mariner): 0P419487-0P464487, 0P464488-0P514868, 1B227000-1B381711
• 150HP VERADO (Mercury): 0P419487-0P464487, 0P464488-0P514868, 1B227000-1B381711

Don’t know where your serial number is? Our quick reference guide shows exactly where to find it on Mercury Marine engines.

Verification & Support

Questions about part 878413A1? Use our parts finder tool to verify fitment yourself. Prefer to talk to an expert? Use the contact buttons at the bottom of this page to reach our team by text, call, or email

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