HIMARKLIF Impeller Repair Kit compatible with 09-812B/119773-42600 — Chloroprene Impeller & Brass Hub

HIMARKLIF water pump impeller repair kit is a drop-in replacement assembly (impeller, gasket, and O-rings) engineered to restore coolant/sea-water circulation on Johnson, Yanmar, Sierra and Indmar engines that use parts 09-812B, 119773-42600, 18-3306, or S685007.

If your marine or engine cooling system is running hot, or you have diminished water flow from an aging impeller, this repair kit supplies the wear parts needed to get circulation back to factory-like performance. The impeller is molded from chloroprene rubber to resist abrasion and repeated flexing, while the brass hub and included seals are chosen for corrosion resistance in freshwater and light salt environments. It’s sold as a simple service kit with one impeller, one gasket, and two O-rings designed to match the original fit and function of Johnson, Yanmar, Sierra and Indmar service numbers.

How will this impeller kit improve my boat’s cooling system?

Replacing a worn impeller restores the pump’s ability to move the designed volume of water, reducing overheating risk and improving engine longevity. The chloroprene rubber blades maintain shape under repeated cycles, and the brass hub resists seizing in the shaft.

• Restores original flow rate lost to cracked or deformed blades
• Improves seal integrity with new O-rings and gasket
• Reduces cavitation and vibration when installed correctly

Will this kit fit my engine model and existing pump housing?

This kit matches common OEM replacement numbers—09-812B, 119773-42600, 18-3306, S685007, and F6B-9—so it fits pumps specified for those parts. It’s produced to meet the original dimensions for form, fit and function, but always compare part numbers and housing dimensions before ordering.

• Compatible with Johnson 09-812B-1 style housings
• Fits Yanmar, Sierra and Indmar pumps using listed numbers
• Measures and fits to standard shaft and keyway arrangements

How difficult is installation — do I need special tools?

Installation is straightforward for anyone familiar with basic marine maintenance. No specialized tools are required, but a few common workshop items speed the job and protect the new parts during assembly.

• Remove the pump housing and old impeller, clean the cavity
• Inspect shaft, keyway and seal surfaces for wear before installing
• Lubricate O-rings lightly and align hub; torque housing bolts evenly

What materials are used and how long will the parts last?

The impeller is made from chloroprene rubber (neoprene) with a brass hub to balance flexibility and corrosion resistance. Life expectancy varies with use, environment and maintenance—regular inspection and annual replacement in saltwater applications are common practices.

• Chloroprene rubber resists compression set and abrasion
• Brass hub limits galvanic corrosion at the shaft interface
• O-rings and gasket replace aged seals to prevent leaks

What’s in the box: one molded chloroprene impeller, one flat gasket, and two O-rings ready for immediate installation. The kit is manufactured to match the original OEM specifications for these replacement numbers, making it a cost-effective service item for scheduled maintenance or urgent repairs.

Who is this for: marine owners, mechanics and repair shops who service small to medium marine engines or water pumps that use Johnson, Yanmar, Sierra or Indmar components. It’s ideal for anyone performing routine cooling system upkeep, preparing a boat for the season, or replacing a failed impeller to eliminate overheating and restore reliable water flow.