Sierra 18-3099 Impeller, Replaces Suzuki 17461-93902, Fits Johnson/Evinrude 9.9/15 HP and Suzuki DT/DF Outboards

The Sierra 18-3099 is a water pump impeller built for a specific group of small outboard engines: Johnson/Evinrude 4-Stroke 9.9 HP and 15 HP models (2002 and up), and Suzuki DT9.9/DT15 (1983-1997), DF9.9/DF15 (1996 and up), and DF20 (2013-2019) outboards. The impeller is the wear part inside the water pump housing that draws in raw water and circulates it through the engine's cooling passages, so a worn or cracked impeller is a common cause of overheating, reduced water flow, or a weak telltale stream. This impeller is molded from durable plastic in a white finish and is packaged one per unit for a single water pump service. It is designed to install into Sierra's 18-3256 Water Pump Kit when a full pump rebuild is being performed, but it can also be used on its own as a direct replacement for the original impeller if the rest of the pump housing and wear plate are still in good condition. Sierra states that this part meets or exceeds the specifications of the original equipment impeller it replaces. Because water pump impellers are fit-specific to a narrow range of engine models, confirm your outboard's exact model and horsepower against the fitment listed below before ordering, since a mismatched impeller will not seat correctly in the pump housing.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3099
• Material: Plastic
• Color: White
• Weight: 0.1 pounds
• Engine Type: 4-Stroke
• Maximum Horsepower: 15 Horsepower
• Unit Count: 1 impeller per package
• Companion Water Pump Kit: Sierra 18-3256
• UPC: 808282167455

Fitment

• Johnson/Evinrude 4-Stroke 9.9 HP and 15 HP outboards, 2002 and up
• Suzuki DT9.9 and DT15 outboards, 1983-1997
• Suzuki DF9.9 and DF15 outboards, 1996 and up
• Suzuki DF20 outboards, 2013-2019

Replaces (OEM)

• Mallory 9-45500
• Johnson/Evinrude Outboard 5033112
• Suzuki Outboard 17461-93900
• Suzuki Outboard 17461-93901
• Suzuki Outboard 17461-93902
• Suzuki Outboard 17461-93903
• Suzuki Outboard 17461-939M0
• Suzuki Outboard 17491-93903

Frequently Asked Questions

What engines does the Sierra 18-3099 impeller fit? This impeller fits Johnson/Evinrude 4-Stroke 9.9 HP and 15 HP outboards from 2002 and up, plus Suzuki DT9.9 and DT15 (1983-1997), Suzuki DF9.9 and DF15 (1996 and up), and Suzuki DF20 (2013-2019) outboards.

Is the 18-3099 a genuine Sierra part or an aftermarket copy? The 18-3099 is a Sierra-branded impeller, manufactured to meet or exceed the specifications of the original equipment impeller it replaces on the listed Johnson/Evinrude and Suzuki outboards.

What OEM part numbers does the 18-3099 replace? The Sierra 18-3099 replaces Mallory 9-45500, Johnson/Evinrude Outboard 5033112, and Suzuki Outboard 17461-93900, 17461-93901, 17461-93902, 17461-93903, 17461-939M0, and 17491-93903.

What material is the 18-3099 impeller made from? It is molded from white plastic, sized and shaped to seat in the water pump housing of the listed Johnson/Evinrude and Suzuki outboards.

How many impellers come in a package? One Sierra 18-3099 impeller is included per package.

Do I need any other parts to install the 18-3099? The 18-3099 impeller is designed for use with Sierra's 18-3256 Water Pump Kit if you are doing a full pump rebuild, though it can also be installed on its own as a direct impeller replacement.

Will this impeller fit a Suzuki DF20 outboard? Yes, the Sierra 18-3099 fits Suzuki DF20 outboards from 2013 to 2019.

Does the 18-3099 fit older Suzuki DT9.9 and DT15 models? Yes, it fits Suzuki DT9.9 and DT15 outboards from 1983 to 1997.

What signs indicate my impeller needs replacing? A weak or missing telltale water stream, engine overheating, or visibly worn or cracked impeller vanes are common signs that the water pump impeller, such as the Sierra 18-3099, needs replacement.

What is the weight of the Sierra 18-3099 impeller? The Sierra 18-3099 impeller weighs 0.1 pounds.

Is the 18-3099 the correct impeller for a 2005 Johnson/Evinrude 9.9 HP 4-stroke? Yes, the Sierra 18-3099 is designed for Johnson/Evinrude 4-Stroke 9.9 HP and 15 HP outboards built 2002 and up, which includes 2005 models.

What color is the Sierra 18-3099 impeller? The Sierra 18-3099 impeller is white.