Sierra 18-3057 Impeller, Replaces Chrysler/Force and Mercury Marine 47-85089-3, Fits 25 HP 1996-1998

The Sierra 18-3057 is a water pump impeller built for the cooling system of specific 25 HP Chrysler/Force outboard engines. The impeller is the wear component inside the lower unit water pump that draws raw water through the engine to keep it running at proper operating temperature; a worn or cracked impeller is one of the most common causes of overheating on small outboards. This impeller is manufactured with metal construction for the vane hub and is sized specifically for the 25 HP application covered below, so it is not a universal fit and should be matched to your engine's horsepower rating and serial number range before ordering.

Sierra parts are produced by Teleflex Marine and sold under the UPC 030999315137. The 18-3057 ships as a single impeller (1 unit count) and is designed as a direct equivalent to the original Chrysler/Force and Mercury Marine impeller it replaces, making it a straightforward like-for-like swap during routine water pump service or a full water pump kit rebuild.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3057
• Product Type: Impeller
• Material: Metal
• Item Dimensions: 7 x 6 x 1 inches
• Weight: 0.04 pounds
• UPC: 030999315137
• Manufacturer: Teleflex Marine
• Included Components: Impeller
• Unit Count: 1
• OEM Cross Reference: 47-85089-3

Fitment

• 25 HP Chrysler/Force outboards, 1996-1998, Serial No. E127700 - E344999

Replaces (OEM)

• Chrysler/Force 47-85089-3
• Mercury Marine 47-85089-3

Frequently Asked Questions

What does the Sierra 18-3057 impeller fit? The 18-3057 fits 25 HP Chrysler/Force outboards built in 1996-1998, within the serial number range E127700 - E344999. Confirm your engine's serial number falls in this range before ordering, since impeller applications on these outboards are serial-specific rather than universal across all years.

What OEM part numbers does the 18-3057 replace? This impeller replaces Chrysler/Force part number 47-85089-3 and the equivalent Mercury Marine part number 47-85089-3. If your old impeller or parts manual references either of those numbers, the Sierra 18-3057 is the correct replacement.

Is the Sierra 18-3057 a genuine Chrysler/Force part or an aftermarket part? The 18-3057 is a Sierra-branded aftermarket impeller manufactured by Teleflex Marine, built to replace the OEM Chrysler/Force and Mercury Marine part 47-85089-3. It is not sold under the Chrysler/Force or Mercury Marine brand name, but it is designed as a direct equivalent for the listed application.

What material is the 18-3057 impeller made from? The Sierra 18-3057 impeller is constructed with metal components in the hub assembly. It is sold as a single impeller unit, not a full water pump repair kit.

How much does the Sierra 18-3057 impeller weigh? The 18-3057 impeller weighs 0.04 pounds, reflecting its compact size as a small-outboard water pump component.

What are the dimensions of the 18-3057 impeller as shipped? The Sierra 18-3057 ships in a package measuring 7 x 6 x 1 inches.

How do I know if my water pump impeller needs replacement? Overheating, reduced or weak water flow from the engine's tell-tale (pee hole), or an engine running hotter than normal are common signs the impeller needs replacing. On the 25 HP Chrysler/Force outboards covered by the 18-3057, the impeller should be inspected whenever the lower unit is serviced.

Does the Sierra 18-3057 come with a housing, gaskets, or other water pump kit parts? No. The 18-3057 is the impeller only, listed with included components of just the impeller itself. It does not include a pump housing, wear plate, or gasket set.

What is the UPC for the Sierra 18-3057 impeller? The UPC for the Sierra 18-3057 impeller is 030999315137.

Who manufactures the Sierra 18-3057 impeller? The Sierra 18-3057 impeller is manufactured by Teleflex Marine under the Sierra brand.

Can the 18-3057 be used on other Chrysler/Force horsepower models? The 18-3057 is specified for 25 HP Chrysler/Force outboards from 1996-1998 with serial numbers E127700 - E344999. Other horsepower ratings and year ranges within the Chrysler/Force lineup use different Sierra impeller part numbers, so this specific part number should not be assumed to fit other models.