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Yamaha 688-44352-03-00 Outboard Waverunner Impeller — main product image
Yamaha

Yamaha 688-44352-03-00 Outboard Waverunner Impeller

★★★★★5.0 (12 reviews)

Genuine Yamaha OEM impeller precision-matched to Waverunner and outboard applications — no guesswork, no compatibility risk.

$19.99*
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

The Yamaha 688-44352-03-00 is a genuine OEM water pump impeller designed for Yamaha Waverunner and sterndrive marine outboard applications. The water pump impeller is a safety-critical cooling system component: its rotation draws raw water through the pump housing to cool the powerhead, and its degradation — through rubber hardening, blade cracking, or debris damage — is the leading cause of preventable outboard engine overheating. Using a genuine OEM part ensures that blade count, diameter, rubber compound specification, and shaft bore tolerance are manufactured to Yamaha's validated engineering parameters, not approximated to a close-enough standard.

Part number 688-44352-03-00 must be verified against your specific engine model, serial number range, and year using the Yamaha parts lookup system or service manual before installation — impeller specifications are not universal across Yamaha's engine lineup, and confirming compatibility is the first step in the replacement procedure. Installation follows the water pump service procedure in the applicable Yamaha service manual, which specifies housing inspection criteria, torque values, and reassembly sequence. Yamaha's recommended replacement interval is annual or every 100 hours, whichever occurs first. For a component whose failure can cause catastrophic powerhead damage, adherence to OEM specification and service interval is the minimum standard for responsible engine maintenance.

Specifications

Part Number
688-44352-03-00
Part Type
Water Pump Impeller
Brand
Yamaha (Genuine OEM)
Compatibility
Yamaha Waverunner, Outboard, Sterndrive Marine applications (verify by model/serial)
Quantity
1

Pros & Cons

👍 Pros

  • Genuine OEM manufacturing ensures dimensional accuracy to Yamaha's factory specifications — impeller blade geometry directly affects coolant flow rate and engine thermal management
  • Covers Waverunner and sterndrive marine applications within compatible model ranges — one part number addressing multiple platforms in a dealer's service inventory
  • Factory materials and durometer specification for the impeller compound are validated by Yamaha — aftermarket rubber compounds vary in heat resistance and flexibility
  • OEM sourcing eliminates the compatibility uncertainty of aftermarket alternatives, which can have blade count or bore dimension variances that affect pump performance
  • Sold as a genuine replacement unit — appropriate for scheduled maintenance or emergency field replacement to restore proper cooling system function

👎 Cons

  • Compatibility must be verified against the service manual for each specific engine model and serial number — the part number alone is insufficient to confirm fitment without cross-referencing
  • Impeller-only replacement may be insufficient if the pump housing bore or wear plate shows scoring — a full pump kit may be required for complete cooling system restoration
  • OEM pricing typically carries a premium over aftermarket alternatives — for budget-sensitive maintenance schedules, this is a relevant procurement consideration
  • Rubber impeller compounds degrade with age regardless of hours — a unit stored improperly before installation may have compromised elasticity at first use
  • No calibration documentation or flow rate certification accompanies the part — specification verification requires reference to the Yamaha service manual

Frequently Asked Questions

The part number 688-44352-03-00 is a Yamaha OEM impeller designated for Waverunner and sterndrive marine applications. Exact model compatibility must be verified against your engine's service manual or the Yamaha parts lookup system using your hull identification number and engine serial number, as impeller specifications vary by engine family and year.
Yamaha recommends inspecting the water pump impeller annually or every 100 hours of operation — whichever comes first — as specified in the engine's service manual. Rubber impeller degradation from heat cycling, age, and debris ingestion is the primary wear mechanism. Replacing on schedule prevents overheating damage to the powerhead.
Whether to replace only the impeller or the full pump housing kit depends on the condition of the housing bore and wear plate upon inspection. A worn or scored housing accelerates impeller wear. If the housing shows scoring or dimensional variance beyond service limits, replacing the impeller alone will not restore full coolant flow performance.
Compare the part number 688-44352-03-00 directly against the parts diagram in your Yamaha service manual for your specific engine model and serial number range. Physical comparison of blade count, diameter, and shaft bore against the removed impeller provides a secondary verification before installation.
This is a genuine OEM Yamaha part manufactured to Yamaha's factory specifications. OEM parts carry Yamaha's quality validation for dimensional accuracy and material specification — critical for a cooling system component where impeller geometry directly affects coolant flow rate and engine operating temperature.

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