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

Manufactured to strict Mercury Marine quality standards, this component ensures reliable operation across all engine RPM ranges. Part number 827442M 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 827442M undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

Compatible Mercury Marine Engines

FITS: 8-9HP MARINER, MERCURY

• Fits MARINER, MERCURY 8-9HP engines
• Compatible HP: 8HP, 9HP
• Covers 4 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

8HP Models

• 8HP OUTBOARD (Mariner): 0H017100-0H017265
• 8HP OUTBOARD (Mercury): 0H017100-0H017265

9HP Models

• 9HP OUTBOARD (Mercury): 0H000058-0H016909

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 827442M 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

Trusted marine parts specialist since 1985. Competitive pricing, same-day shipping on most orders.