Don’t miss another weekend. This genuine Mercury Marine **O-RING, OIL COOLER COVER | COMPONENT OF ENGINE/POWERHEAD GASKET SET [27- 43186A 1]** ships fast and installs easily – get back on the water where you belong.

Built to Mercury’s exacting factory standards, this gasket ensures reliable operation across all engine RPM ranges. Part number 42357 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.

Don’t risk your Mercury engine with untested aftermarket copies. OEM part 42357 is manufactured to Mercury Marine’s exact specifications, ensuring compatibility and performance that inferior alternatives simply can’t match.

FITS: 3-488HP MERCRUISER

• Fits MERCRUISER 3-488HP engines
• Compatible HP: 3HP, 165HP, 170HP, 180HP, 190HP, 488HP
• Covers 7 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

3HP Models

• 3HP OUTBOARD (Mercruiser)

165HP Models

• 165HP OUTBOARD (Mercruiser): 0B434941-0B774251

170HP Models

• 170HP OUTBOARD (Mercruiser): 6916779-0B434940

180HP Models

• 180HP OUTBOARD (Mercruiser): 0B436391-0B775248

190HP Models

• 190HP OUTBOARD (Mercruiser): 6916779-0B436390

488HP Models

• 488HP OUTBOARD (Mercruiser): 6170297-6916778

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

Double-check compatibility for part 42357 using our parts finder tool. Still need assistance? No worries – contact us via the buttons at the bottom of this page (text, call, or email).

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