LucaSng Water Pump Kit for Johnson Evinrude Outboards — 20-35 HP Replacement Impeller & Gasket Set

This aftermarket water pump kit contains the components needed to replace a worn impeller and its seals on compatible Johnson, Evinrude and OMC outboard motors. It fits multiple model years and horsepower ranges, matching OEM part numbers like 393630 and Sierra 18-3382 so you can repair your lower unit without buying an expensive manufacturer factory part. The kit is supplied with gaskets, impeller, housing components and fasteners as pictured, intended for routine maintenance or emergency replacement when water flow to the engine drops.

Which outboard engines will this LucaSng kit fit?

The kit covers a broad range of Johnson and Evinrude outboards across several model years and horsepower classes. Compatibility includes 20 hp and 25 hp units from 1985 onward, 25 hp commercial models from 1998–2001, and many 30–35 hp models spanning 1980 to later two-cylinder configurations.

• 20 hp — 1985 & later
• 25 hp — 1985 & later; commercial 1998–2001
• 30 hp — 1980–present; 2-cylinder 1983 & later
• 35 hp — 1980–1982 and 2-cylinder 1983 & later
• Replaces OEM 393630 / 0393630 and Sierra 18-3382

How does this pump kit improve cooling and engine reliability?

Replacing a failing impeller and worn seals restores the engine’s ability to circulate cooling water, which helps prevent overheating and keeps operating temperatures stable. The kit supplies all critical wear items so you can rebuild the water pump assembly during scheduled maintenance or after a noticed decrease in water stream from the telltale.

• New impeller blades restore proper water flow
• Fresh gaskets and seals prevent leaks and ingestion of air
• Included hardware enables a complete assembly swap
• Works with OEM mounting geometry for a straightforward fit

What’s included and what tools will I need to install it?

The LucaSng kit ships with the impeller, gasket set, housing components and the necessary fasteners shown in the product photos. Typical installation requires common marine tools and basic mechanical skill; plan for prop removal, lower unit access, and a brief cooling-system bleed after fitment.

• Impeller, gaskets, seals, housing parts and bolts included
• Tools: socket set, torque wrench, screwdrivers, marine grease
• Expect 1–2 hours for a competent DIY mechanic
• Follow engine manual torque specs and fill/bleed procedures

Will this aftermarket kit match OEM performance?

LucaSng designs this replacement to meet the dimensions and fitment of the original Johnson/Evinrude parts it replaces. While materials and manufacturing differ from factory-labeled items, the kit is specified to restore normal cooling function when installed correctly and used within the stated engine ranges.

• Form, fit and function aim to replicate OEM 393630
• Intended for routine service intervals and emergency repairs
• Inspect impeller orientation and shaft keying during installation
• Replace at recommended intervals to avoid in-water failures

Who is this for: Boaters, marine technicians and DIY enthusiasts who own Johnson, Evinrude or OMC outboards in the 20–35 HP range and need an economical, complete water pump replacement. This kit is suited for someone who prefers to perform scheduled lower-unit maintenance or wants a ready-to-install repair option when cooling flow diminishes. If you require an exact OEM-branded replacement, check part numbers and engine year; otherwise this LucaSng kit offers a practical, compatible solution for restoring water pump performance.