Sierra Sea Water Pump 18-3600, Replaces 46-807151A12, Fits V6 & V8 Engines with V-Belt and 1-Piece Pump

The Sierra 18-3600 is a complete sea water pump built to circulate raw cooling water through the engine on applicable marine V6 and V8 inboard/sterndrive setups. It is designed for engines that use a v-belt drive and a one-piece pump housing configuration, making it a direct fit for that engine family rather than a universal pump. This is a full pump assembly, so it installs in place of the original unit to restore proper raw water flow and keep engine temperatures in check.

As a raw water circulation component, this pump is a wear item that should be inspected and serviced periodically, since impeller wear and housing fatigue are common causes of overheating in marine engines. When the impeller inside the 18-3600 eventually wears out, Sierra part number 18-3237 is the matching impeller repair kit for this pump, so owners can rebuild rather than replace the full assembly at the first sign of reduced flow. The 18-3600 carries a limited warranty and is intended as a direct equivalent to the original engine manufacturer pump it replaces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3600
• Product Type: Sea Water Pump
• Fitment: V6 and V8 engines with v-belt and 1-piece pump
• Compatible Repair Kit: 18-3237 impeller repair kit
• Weight: 7.08 pounds
• UPC: 808282286507
• GTIN: 00808282286507
• Warranty: Limited warranty

Fitment

• V6 and V8 engines with v-belt and 1-piece pump

Replaces (OEM)

• 46-807151A12

Frequently Asked Questions

What does the Sierra 18-3600 sea water pump replace? The 18-3600 is a direct replacement for OEM number 46-807151A12, so any engine that originally used that pump can be fitted with the Sierra 18-3600 instead.

What engines does the 18-3600 fit? This pump fits V6 and V8 engines that use a v-belt drive along with a one-piece pump housing design; it is not a universal fit across all V6/V8 configurations.

Does the 18-3600 include the impeller? The 18-3600 is a complete sea water pump assembly. When the impeller eventually wears out, the matching Sierra 18-3237 impeller repair kit is used to rebuild this pump.

What repair kit works with this pump? Sierra 18-3237 is the impeller repair kit designed for the 18-3600 sea water pump, allowing the pump to be rebuilt rather than fully replaced when the impeller wears.

How much does the 18-3600 sea water pump weigh? The Sierra 18-3600 weighs 7.08 pounds.

Is the 18-3600 a genuine Sierra part or an aftermarket equivalent? The 18-3600 is a Sierra-branded sea water pump manufactured as a direct equivalent to OEM number 46-807151A12, backed by a limited warranty.

Is the 18-3600 pump a one-piece or two-piece design? It is built for engines using a one-piece pump housing configuration, per the fitment specified for this part.

Does the 18-3600 fit v-belt or serpentine belt engines? The 18-3600 is fitted for engines with a v-belt drive, not a serpentine belt configuration.

Will 46-807151A12 fit if I order the Sierra 18-3600 instead? Yes, the Sierra 18-3600 is manufactured as a replacement for OEM part 46-807151A12.

What is the UPC for the Sierra 18-3600 sea water pump? The UPC for the 18-3600 sea water pump is 808282286507.