0307551 Evinrude Johnson Drain fill Plug | Genuine OEM BRP Outboard Part

🔧 Product Description

Genuine BRP Lower-Unit Drain and Fill Plug - Part Number: 0307551

A genuine BRP threaded drain and fill plug used in selected Evinrude, Johnson and OMC lower gearcases.

The plug is removed when draining or refilling the lower-unit gear lubricant. A new sealing washer should be installed whenever the plug is removed to help prevent lubricant loss and water entry.

⚙️ Key Features

• Genuine BRP OEM gearcase drain and fill plug
• Correct OMC part number 0307551
• Used for lower-unit lubricant draining and filling
• Cross-references with later OMC and BRP plug numbers
• Compatible with Sierra, Mallory, GLM and SEI replacements

🚤 Compatibility

Commonly used on

• Evinrude and Johnson lower gearcases
• OMC outboard and V6 lower-unit lubricant housings
• Gearcases using drain plug 0307551, 0912625 or 0982851

Typically suits

• Engine models:
• Evinrude / Johnson 8HP outboards
• Evinrude / Johnson 9.9HP outboards
• Evinrude / Johnson 10HP outboards
• Evinrude / Johnson 15HP outboards
• Evinrude / Johnson 20HP through 70HP gearcases using the same threaded plug
• Evinrude / Johnson 75HP through 115HP gearcases using 0307551
• Selected OMC V6 outboard gearcases specifying 0307551, 0912625 or 0982851
• HP Range: Documented 8HP - 115HP, plus selected V6 gearcases
• Engine Type: Evinrude / Johnson / OMC outboard lower unit
• Year Range: Model and gearcase controlled

🔌 Function

The plug closes the lower-unit lubricant drain or fill passage. Together with its sealing washer, it keeps gear lubricant inside the housing and prevents water entering through the threaded opening.

⚠️ Common Signs of Failure

• Gear lubricant leaking around the plug
• Milky or water-contaminated lubricant
• Damaged screwdriver slot or rounded plug head
• Stripped, corroded or damaged threads
• Missing or flattened sealing washer
• Gearcase fails pressure or vacuum testing at the plug

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0982851 later OMC / BRP drain-plug service reference
• 0912625 later OMC drain-plug reference
• 0307551 original OMC drain and fill plug reference

OEM / Related Numbers

• 0307551
• 307551
• 0912625
• 912625
• 0982851
• 982851
• Drain-plug washer: 0311598
• Drain-plug washer: 311598
• BRP service reference: 0777602
• 777602

Aftermarket / Verified Equivalents

• Sierra: 18-2387
• Sierra: 18-2387-9
• Sierra: 18-4255
• Mallory: 9-72655
• GLM: 22420
• SEI Marine: 98-360-35K

📦 Condition

• Genuine BRP part
• Brand new
• Supplied in original or equivalent packaging