Sierra 18-3062 Water Pump Impeller, Replaces Chrysler/Force 47-42038-2

The Sierra 18-3062 is a water pump impeller built as a direct replacement for the original equipment part it supersedes, restoring proper raw-water flow through the outboard's cooling system. The impeller is manufactured with a machined exterior finish for consistent fit and smooth operation inside the water pump housing, and it is engineered to meet or exceed the quality of the original equipment part it replaces.

Compact and precisely sized at 2.5 x 2.5 x 1 inches, the 18-3062 is a lightweight, easy-to-stock component for routine water pump maintenance. Replacing a worn or cracked impeller on schedule helps prevent overheating and protects the powerhead from cooling-related damage, making this a key part for any outboard maintenance kit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3062
• Product Dimensions: 2.5 x 2.5 x 1 inches
• Weight: 0.03 pounds
• Exterior Finish: Machined
• UPC: 808282243791
• OEM Cross Reference: 47-42038-2, 002

Fitment

Fitment details for this specific part number are not specified; confirm compatibility using the OEM cross-reference numbers below.

Replaces (OEM)

• 47-42038-2
• 002

Frequently Asked Questions

What OEM part numbers does the Sierra 18-3062 impeller replace? The Sierra 18-3062 impeller replaces OEM numbers 47-42038-2 and 002. It is also cross-referenced as an interchangeable fit for Chrysler 47-42038-2, GLM 89451, Mallory 9-45309 and 9-45309-10, and Mercury 47-42038-2, 47-42038Q02, and 47-420381.

Is the 18-3062 a genuine OEM part or an aftermarket replacement? It is an aftermarket impeller from Sierra, manufactured to meet or exceed the quality of the original equipment part it replaces rather than being sold under the original engine maker's branding.

What are the dimensions of this impeller? The Sierra 18-3062 impeller measures 2.5 x 2.5 x 1 inches.

How much does the 18-3062 impeller weigh? This impeller weighs 0.03 pounds.

What finish does the Sierra 18-3062 impeller have? The 18-3062 has a machined exterior finish for a precise, consistent fit inside the water pump housing.

Will the Sierra 18-3062 fit my engine? Fit depends on matching part numbers rather than engine model alone, so confirm compatibility by checking whether your original impeller or water pump kit lists 47-42038-2, 002, GLM 89451, Mallory 9-45309/9-45309-10, or Mercury 47-42038Q02/47-420381 as a match before ordering the 18-3062.

What is included when I order part number 18-3062? Ordering the 18-3062 gets you the single Sierra water pump impeller; it does not include a full water pump repair kit or gasket set.

How do I know if my impeller needs replacing? A cracked, torn, or worn-down impeller reduces raw-water flow and can lead to engine overheating, which is the main reason boaters replace a part like the 18-3062 as routine maintenance.

Is the Sierra 18-3062 the same as Mercury 47-42038Q02? Yes, 47-42038Q02 is listed as an interchangeable Mercury equivalent to the Sierra 18-3062 impeller.

Does the 18-3062 come with installation hardware? No, the 18-3062 is the impeller itself; it does not include a water pump housing, gasket, or mounting hardware.