Experiencing engine hesitation or reduced power? This authentic Mercury Marine **FITTING ASSEMBLY, Drain | Part Is New And Listed For The First Time** solves the problem with factory precision – no guessing, no compromises.

Precision-engineered for Mercury outboards, this component ensures reliable operation across all engine RPM ranges. Part number 863786A1 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.

Factory parts exist for a reason – they work. Part 863786A1 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

FITS: 350HP MERCRUISER

• Fits MERCRUISER 350HP engines
• Compatible HP: 350HP
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

350HP Models

• 350HP MAG MPI (Mercruiser): 0M300000-0M599999, 0M600000-0W059999, 0W060000-0W309999, 0W310000-0W649999, 0W650000-1A299999, 1A300000-1A611927, 1A611928-1A623184, 0M310000-0M316999, 0M398372-0W389999, 0W390000-0W689999, 0W690000-1A089999
• 350HP MAG MPI MIE (Mercruiser): 0M310000-0M316999
• 350HP OUTBOARD (Mercruiser): 0M300000-0M599999, 0M600000-0W059999, 0W060000-0W309999, 0W310000-0W649999, 0W650000-1A299999, 1A300000-1A611927, 1A611928-1A623184, 1A300000-1A611927, 1A611928-1A623184

Need help finding your serial number? Check our serial number location guide for step-by-step instructions on locating it on your engine.

Questions about part 863786A1? 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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