The Mercury / Quicksilver 85089Q4 is a genuine OEM water pump impeller repair kit for Mercury and Mariner 15–25HP 2-stroke outboard engines. It includes everything needed to fully rebuild the water pump — keeping your cooling system flowing and your engine protected.

Supersedes: 47-85089T7, 47-85089T4
Cross-reference: Sierra 18-3215

Suits

• Mercury & Mariner 15HP 2-stroke – select models and years
• Mercury & Mariner 18HP 2-stroke – select models and years
• Mercury & Mariner 20HP 2-stroke – select models and years
• Mercury & Mariner 25HP 2-stroke – select models and years

Always verify fitment using your engine model and serial number before purchasing. Message us if you’re unsure — we’re happy to confirm.

Kit Contents

• Impeller (improved elastomers for broad temperature flexibility)
• Wear plate
• Gaskets & O-rings
• All components required to fully rebuild the water pump

Maintenance Tip

Inspect your impeller every season and replace every 2–3 seasons or if any cracking, deformation, or reduced flow is observed. A failed impeller means no cooling water — don’t risk it.

Specifications

• Part Number: 85089Q4 (also known as 47-85089Q4)
• Brand: Mercury / Quicksilver (Genuine OEM)
• Suits: 15–25HP 2-stroke Mercury & Mariner outboards
• Weight: 0.2 kg
• Barcode: 745061040618