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311598 Drain Plug Gasket Compatible with Johnson Evinrude OMC
✅ In stock
F
Grade
Price verified Sep 22, 2026 4:26 PM · Prices & availability subject to change
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💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
TCVG
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓【Part Numbers and Kit】 6 pack lower unit drain and fill plug washer set for marine gearcase service. Replaces / cross-references 311598, 3852105, 18-4248, 18-4248-9, 9-60408, and also referenced as 777517 in some replacement listings. Designed for gearcase drain and fill screw sealing during lower unit gear oil changes.
✓【Marine Compatibility】 Compatible with Johnson outboard engines and compatible with Evinrude outboard engines using 311598 lower unit drain/fill plug washer references. Also compatible with OMC sterndrive gearcases using 311598 or 3852105, and also compatible with Volvo Penta applications using 3852105. Also compatible with Sierra 18-4248 / 18-4248-9, compatible with Mallory 9-60408, and compatible with Sierra 18-2387 lower unit drain/fill screw applications.
✓【Dual Nylon Upgrade】 Includes 4 white PA6 nylon washers and 2 molybdenum-disulfide modified PA66 nylon washers. White PA6 nylon supports routine marine sealing service, while MoS₂-filled PA66 nylon offers lower friction, stronger wear resistance, and improved mechanical strength for higher-demand drain/fill plug seating conditions.
✓【Drain Fill Seal】 Installs under the lower unit drain screw or fill screw to seal the contact area between the plug and gearcase housing. The washer helps maintain the gear oil service seal and supports gearcase protection during freshwater boating, saltwater boating, seasonal storage, outboard service, and sterndrive maintenance.
✓【Gearcase Service Use】 Designed to replace crushed, reused, missing, or worn plug washers that may cause gear oil seepage around the screw, water intrusion into the lower unit, milky gear oil, corrosion near the drain/fill plug, or repeated seepage after gear oil service. Replace the washer whenever the drain or fill screw is removed, and confirm part number and screw style before ordering.
✓Why Choose Our Washers? Compatible with a wide range of outboard motors and gearcases Marine-grade nylon construction ensures durability and long-lasting use in saltwater and freshwater environments UV-resistant and saltwater-resistant to withstand harsh marine conditions Easy installation: Simple process with no tools required Convenient multi-pack options for multiple services or engines Reliable seal for preventing leaks and maintaining gearcase integrity
⚙️ Specifications
TCVG
1.58 ounces
1 x 1 x 1 inches
311598
White Black
6 Pack Lower Unit Drain Plug Gasket
Manufacturer
TCVG
Item Weight
1.58 ounces
Product Dimensions
1 x 1 x 1 inches
Item model number
311598
Color
White Black
Included Components
6 Pack Lower Unit Drain Plug Gasket
ASIN
B0GYMS8HMF
Customer Reviews
5.0