Description

Mercury 19453T is a genuine Quicksilver water pump impeller for selected Mercury outboard applications. Mercury’s current product listing identifies it specifically for Mercury 3-cylinder 40 HP 4-stroke outboards, and dealer listings show it in Mercury shorthand as 47-19453T.

Key Features

• Genuine Mercury Marine / Quicksilver OEM impeller
• Part number 19453T
• Mercury shorthand listing: 47-19453T
• Water pump service part for selected Mercury outboards
• Mercury positions it in its Water Pump Repair Kits & Impellers lineup.

Engine Compatibility
Mercury’s official listing ties 19453T to Mercury 3-cylinder 40 HP 4-stroke outboards. Other dealer fitment references also associate 47-19453T with selected Mercury 3-cylinder outboard families, but exact fitment should still be confirmed by engine model and serial number before ordering.

Serial Number Fitment Notice
Please confirm compatibility in the Mercury Parts Catalog using your exact engine serial number before purchase. Mercury’s official catalog is organized by model and serial number for accurate parts lookup.

When This Part Needs Replacement
Replace this impeller during scheduled water pump service or when cooling-water flow drops, the engine runs hotter than normal, or the original impeller shows wear, cracking, stiffness, or missing vanes. Mercury notes that impellers should be inspected and replaced regularly to keep the engine operating at the correct temperature.

Installation Notes
Install only the exact impeller specified for the outboard being serviced. Water pump parts can vary by horsepower, cylinder count, gearcase, and serial range, so matching by exact part number and serial-based parts diagram is the safest approach.

Alternate / Superseded Part Numbers

• 47-19453T
• Earlier part 47-19453 is shown by dealer listings as superseded to 19453T.

Parts Desk Insight
Impellers are one of the most important routine-service parts on an outboard because they are the heart of the cooling system. Replacing a worn impeller before it fails is a simple way to help avoid overheating and the much bigger repair bill that can follow. That advice aligns with Mercury’s own guidance that impellers need regular inspection and replacement.

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