Sierra 18-3286 Impeller Repair Kit for OMC Stern Drives, 1964-86, Except Cobra

The Sierra 18-3286 Impeller Repair Kit is a water pump service kit built for OMC stern drives, 1964-86, except Cobra. It is designed for the technician or boat owner overhauling the water pump section of the lower unit rather than replacing the impeller alone, giving the pump housing a proper sealing surface and wear parts at the same time the impeller is serviced. The kit contains a pump liner (OEM 911844), an O-ring (OEM 310584), and a plate (OEM 313176), each manufactured to precision tolerances so they seat and seal correctly against the surrounding pump components. Installing these wear parts together with a new impeller during a water pump rebuild helps restore proper cooling water flow and reduces the chance of a repeat failure caused by a worn liner or a hardened, leaking O-ring. The Sierra 18-3286 is designed to be interchangeable with Mallory 9-45284, and Sierra states that each of its parts meets or exceeds the original equipment part it replaces. This kit is intended specifically for the 1964-86 OMC application listed and excludes the Cobra stern drive.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3286
• Product Type: Impeller Repair Kit
• Application: OMC stern drives, 1964-86, except Cobra
• Kit Contents: Pump Liner (Sierra 18-7129, OEM 911844), O-Ring (Sierra 18-7135, OEM 310584), Plate (Sierra 18-3141, OEM 313176)
• Product Dimensions: 2.25 x 8 x 10 inches
• Weight: 0.62 pounds
• UPC: 030999315762
• Interchange: Mallory 9-45284

Fitment

• OMC stern drives, 1964-86, except Cobra

Replaces (OEM)

• Mallory 9-45284

Frequently Asked Questions

What does the Sierra 18-3286 impeller repair kit fit? The 18-3286 kit fits OMC stern drives from 1964-86, except the Cobra stern drive, which is specifically excluded from this application.

What is included in the Sierra 18-3286 kit? This impeller repair kit contains a pump liner (OEM 911844), an O-ring (OEM 310584), and a plate (OEM 313176) for servicing the water pump.

Is the Sierra 18-3286 interchangeable with any other brand's part? Yes, the Sierra 18-3286 is designed to be interchangeable with Mallory 9-45284.

What OEM number does the pump liner in this kit cross to? The pump liner included in the Sierra 18-3286 kit corresponds to OEM number 911844.

Does the Sierra 18-3286 fit the OMC Cobra stern drive? No, the Cobra stern drive is specifically excluded from the 1964-86 application range covered by the Sierra 18-3286 kit.

How much does the Sierra 18-3286 impeller repair kit weigh? The Sierra 18-3286 kit weighs 0.62 pounds.

What are the packaged dimensions of the Sierra 18-3286 kit? The Sierra 18-3286 impeller repair kit measures 2.25 x 8 x 10 inches as packaged.

What OEM number does the O-ring in the 18-3286 kit cross to? The O-ring supplied in the Sierra 18-3286 kit corresponds to OEM number 310584.

What OEM number does the plate in the 18-3286 kit cross to? The plate included in the Sierra 18-3286 kit corresponds to OEM number 313176.

Is the Sierra 18-3286 a genuine Sierra part? Yes, the 18-3286 is a genuine Sierra manufactured part, built to precision tolerances to meet or exceed the original equipment part it replaces.

What warranty applies to the Sierra 18-3286 kit? The Sierra 18-3286 impeller repair kit is covered under Sierra's standard customer satisfaction warranty, the same coverage applied across Sierra's parts line.

What years does the Sierra 18-3286 impeller repair kit cover? The 18-3286 kit covers 1964-86 OMC stern drive applications, except the Cobra model.