Keep your outboard motor running smooth and leak-free with the Sierra 18-2624 Seal Kit, a reliable choice for boat owners tackling crankshaft seal replacements. Whether you're prepping for a season of fishing charters or weekend cruises, this kit delivers the precision and durability needed to seal out oil leaks and protect your engine's internals from saltwater corrosion.

Why Your Engine Needs the Sierra 18-2624 Seal Kit

Crankshaft seals wear down over time from constant heat, pressure, and exposure to marine environments. A failing seal often shows up as oil spots under your boat, reduced compression, or unusual engine noise. The Sierra 18-2624 steps in as a direct-fit solution, restoring factory-level performance without the premium cost. Boaters rave about how it revives older V4 and V6 two-stroke engines, getting them back on the water faster.

Key Features That Set It Apart

• Premium Materials: Constructed from high-grade rubber compounds resistant to oil, fuel, and UV degradation, ensuring long-term reliability in harsh marine conditions.
• Exact Specifications: Engineered to match original equipment dimensions for a seamless fit, minimizing downtime during installation.
• Complete Kit: Includes both upper and lower crankshaft seals, so you have everything for a thorough rebuild in one package.
• Versatile Compatibility: Designed for a wide range of Johnson/Evinrude and OMC engines, covering popular 65-300 HP models from the 1970s through the 1990s.

Pro Installation Tips for DIY Boaters

Swapping seals doesn't have to be a yard project. Start by draining the oil and removing the flywheel for access. Use a seal puller to extract old seals gently, avoiding damage to the crank. Lightly lube the new seals with engine oil before pressing them in evenly with a driver tool—never hammer directly. Torque to spec and run a compression test post-install to confirm the seal. For saltwater warriors, inspect nearby bearings while you're in there to prevent future headaches.

Boost Engine Longevity with Smart Maintenance

Pairing the Sierra 18-2624 with regular oil changes and fresh water flushes can double your powerhead's life. Track hours on your motor and watch for milky oil, a telltale sign of water intrusion past worn seals. Many captains swear by this kit for rebuilds, noting smoother idling and better fuel efficiency afterward. It's not just a fix—it's an upgrade for reliable performance on every outing.