Protect your Mercury investment with genuine OEM parts that last. This CUP WASHER, ADAPTOR delivers years of reliable service – not just one season like cheap alternatives.

Designed and manufactured to Mercury Marine OEM standards, this component ensures reliable operation across all engine RPM ranges. Part number 30188 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.

Why risk your Mercury engine with questionable aftermarket parts? Genuine part 30188 is built to last, backed by Mercury Marine’s decades of marine engineering expertise and proven reliability.

Compatible Mercury Marine Engines

FITS: 100-115HP MARINER, MERCURY

• Fits MARINER, MERCURY 100-115HP engines
• Compatible HP: 100HP, 110HP, 115HP
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

100HP Models

• 100HP OUTBOARD (Mercury): 1290910-1499331, 1464949-1768403, 1768404-2318585, 2641855-3253111, 2318586-2836018

110HP Models

• 110HP OUTBOARD (Mercury): 3263263-3795657, 3795658-4839253, 4839254-5206549, 7027323-7111347, 7111348-7125387, 8015040-8050624, 8050625-8057544, 9041439-9165304, 9165303-9217755, 1870204-2314955

115HP Models

• 115HP OUTBOARD (Mariner): 4865178-5430526, 5430527-5738890, 5738891-6436122
• 115HP OUTBOARD (Mercury): 5314656-5600966, 5600967-6436122, 7131213-7147987, 7147988-7208847

Looking for your Mercury engine serial number? Our helpful guide shows you exactly where serial numbers are located on different engines.

Verification & Support

Not sure if part 30188 fits your engine? Try our parts finder tool — it’s quick and easy. Need expert help? Contact us using the buttons at the bottom of this page – text, call, or email, whatever works best for you

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