FASWORX Gearcase Lower Unit Seal Kit for Evinrude Johnson OMC V4 V6 V8 75-300 HP Outboards & E-TEC - Replaces OEM 5006373, 0439141, Sierra 18-8384 - Mechanical Shift Only

FASWORX Premium Lower Unit Gearcase Seal Kit (Replaces OEM 5006373) Protect your investment and upgrade your marine engine's defense against saltwater intrusion with the FASWORX Premium Lower Unit Gearcase Seal Kit. Preventative maintenance is the key to longevity on the water, and our comprehensive teardown kits are built to out-perform standard OEM specifications in the harshest marine environments. Premium "Built-to-Last" Construction: We don't cut corners on materials. This kit utilizes high-grade EPDM rubber and temperature-resistant synthetic elastomers that maintain their integrity under extreme heat and pressure. Paired with corrosion-resistant 316 stainless steel fasteners and captive O-rings, this kit ensures your gearcase stays tightly sealed and protected season after season.

• DIRECT REPLACEMENT FITMENT: Premium lower unit seal kit exactly replaces OEM part numbers 5006373, 0396354 0439141, 0437752, 0437753, 0438278, 0434516, 0396353. Cross-references with Sierra Marine18-8384, SEI Marine 95-304-11K, GLM 87600, Mallory Marine 9-74106, Recmar REC5006373, OBR Red Rhino JE-312 for a perfect factory fit.
• BROAD OUTBOARD COMPATIBILITY: Fits a wide range of Evinrude, Johnson, and OMC V4, V6, and V8 outboard motors (75 HP, 85 HP, 88 HP, 90 HP, 100 HP, 110 HP, 115 HP, 120 HP, 125 HP, 130 HP, 135 HP, 140 HP, 150 HP, 155 HP, 175 HP, 185 HP, 200 HP, 225 HP, 250 HP, 275 HP 300 HP) from 1978 to 2006+, plus compatible E-TEC models from 2004 and newer
• MECHANICAL SHIFT ONLY: Specifically engineered for mechanical shift gearcases. CRITICAL: Please verify your gearcase type before purchasing; this kit will NOT fit SLE (Straight Leading Edge) gearcases or electric shift models.
• MARINE-GRADE DURABILITY: Built to outlast standard OEM specifications. Engineered with advanced EPDM rubber, high-grade synthetic elastomers, and 316 stainless steel to prevent leaks and block harsh saltwater intrusion.
• COMPLETE TEARDOWN KIT: Includes everything needed for a full preventative maintenance rebuild: spring-energized metal-cased lip seals, a comprehensive O-ring assortment, stamped impeller gasket, OEM-spec retainer hardware, and an E-Tec drain screw with a magnet.