Water pump impeller repair kit Mercury / MerCruiser Outboards 40 50 60 hp EFI outboard 46-812966A12

Water Pump Repair Kit for Mercury / MerCruiser Outboards – Sierra SM-18-3570

Ensure optimum cooling and reliable performance with this high-quality Sierra Marine Water Pump Repair Kit (SM-18-3570), a direct replacement for Mercury part numbers 46-817275A1 and 46-817275A2. This comprehensive service kit is suitable for a wide range of Mercury, MerCruiser, Force, Chrysler and US Marine outboards, including popular 2-stroke and 4-stroke models from 30HP to 250HP.

✅ Kit Includes:

• Impeller (Sierra 18-3056 / Mercury 47-430262)

• Water Pump Housing

• Face Seal & Tool (Sierra 18-2599 / Mercury 26-816575A2)

• Impeller Plate (Sierra 18-3122 / Mercury 817276)

🔧 Specifications:

• Outer Diameter: 3.479"

• Inner Diameter: 0.875"

• Width: 1.260"

• Drive Type: Key Drive

• Number of Impeller Blades: 6

• Brand: Sierra Marine

• Suitable For: MerCruiser | Mercury Outboards

⚙️ Compatible With:

• MerCruiser Alpha One Gen II (1991–2019)

• A wide range of Mercury outboards from 30HP to 250HP, including Bigfoot, Jet, EFI, and DFI models

• Force, Chrysler & US Marine outboards from 75HP to 120HP (various years)

Sierra Marine water pump kit 18-3570 with impeller will replace the following repair kits:

- Mercury 46-817275A1 & 46-817275A2

- Sierra 18-3571

Sierra 18-3570 water pump service kit contains:

- Impeller 18-3056 (47-430262)

- Water Pump Housing

- Face Seal & Tool 18-2599 (26-816575A2)

- Impeller Plate 18-3122 (817276)

The water pump repair kit is suitable for the following engines:

Mercruiser:

- Alpha One Gen II (1991-2019) 4-stroke

Chrysler, Force & US Marine:

- 75hp (1999) 2-stroke 3-cylinder

- 90hp (1995-1999) 2-stroke 3-cylinder

- 120hp (1995-1999) 2-stroke 4-cylinder

Mercury:

- 30hp 4-stroke (1999-2001) 3-cylinder

- 30hp Carb (2002-2005) 4-stroke 3-cylinder

- 40hp 4-stroke (1995-2001) 3 & 4-cylinder

- 40hp 4-stroke 4-cylinder (2001-2002)

- 40hp Carb 4-stroke (2002-2005) 3-cylinder

- 40hp EFI 4-cylinder (2001-2019) 4-stroke

- 40hp Italy (1999-2001) 4-stroke 4-cylinder

- 40 Jet (1999-2004) 60hp 2-stroke 3-cylinder

- 45hp Bodensee (1995-2001) 4-stroke 4-cylinder (OG231123 & Up)

- 45 Jet (1991-2004) 60hp 2-stroke 3-cylinder

- 50hp 4-stroke (2001-2002) 4-stroke 4-cylinder

- 50hp Bigfoot (1995-2001) 4-stroke 4-cylinder 935cc & 996cc (OG231123 - OT178499, OT178500 & Up)

- 60hp 4-stroke 4-cylinder (2001-2002)

- 60hp Bigfoot (1998-2004) 2-stroke 3-cylinder (OD000750 & Up)

- 60hp Bigfoot 4-stroke (OT178500 & Up)

- 65 Jet (1994-2004) 90hp 2-stroke 3-cylinder (OC283222 & Up)

- 70hp 3-cylinder (OA996142 & Up)

- 75hp 3-cylinder (1990-2010) 2-stroke (OC222000 & Up)

- 75hp 4-stroke (2000-2005) 4-cylinder (OG960500 & Up)

- 75hp Bodensee (2000-2005) 4-stroke 4-cylinder

- 75hp DFI (2004-2019) 2-stroke 1.5 litre 3-cylinder

- 75hp EFI (2005-2019) 4-stroke 4-cylinder

- 80hp 3-cylinder (OA996142 & Up)

- 80hp EFI (2005-2019) 4-stroke 4-cylinder

- 80 Jet 115hp 2-stroke 4-cylinder (OD283222 & Up)

- 90hp 3-cylinder (1990-2019) 2-stroke (OA996142 & Up)

- 90hp 4-stroke (2000-2005) 4-cylinder (OG960500 & Up)

- 90hp EFI (2005-2019) 4-stroke 4-cylinder

- 100hp 2-stroke 4-cylinder (OB209468 & Up)

- 100hp EFI (2005-2019) 4-stroke 4-cylinder

- 115hp 4-cylinder 2-stroke (OC100000 & Up)

- 115hp DFI 1.5L (2004-2019) 2-stroke 3-cylinder

- 115hp EFI 4-stroke 4-cylinder

- 115hp Pro XS 1.5L 2-stroke 3-cylinder

- 125hp 4-cylinder 2-stroke (OD283222 & Up)

- 125hp DFI 1.5L (2006-2019) 2-stroke 3-cylinder

- 200hp 3.0L DFI DTS (2003-2007) 2-stroke 6-cylinder

- 200hp 3.0L EFI (2002-2006) 2-stroke 6-cylinder

- V-200 200hp DFI (1997-2006) 2-stroke 3 litre 6-cylinder (OG386496 - OG589999, OG590000 & Up)

- 225hp 3.0L DFI DTS (2003-2006) 2-stroke 6-cylinder

- 225hp 3.0L EFI Marathon (2004-2006) 2-stroke 6-cylinder

- 225hp 3.0L EFI SeaPro (2004-2006) 2-stroke 6-cylinder

- 225hp DFI (1998-2006) 2-stroke 3 litre 6-cylinder

- 225hp DFI 3.0L 2-stroke 6-cylinder (OG590000 & Up)

- 225hp Marathon Carb (1994-2001) 2-stroke 3 litre 6-cylinder

- 225hp Pro XS DFI (2005-2006) 2-stroke 3 litre 6-cylinder

- 225hp SeaPro Carb (1994-2001) 2-stroke 3 litre 6-cylinder

- V-225 225hp 3.0L Carb (1994-2001) 2-stroke 6-cylinder (OD280813 & Up)

- V-225 225hp 3.0L EFI (1995-2006) 2-stroke 6-cylinder (OD280813 & Up)

- 3.0L EFI Marathon (2002-2003) 225hp & 250hp 2-stroke 6-cylinder

- 3.0L EFI SeaPro (2002-2003) 225hp & 250hp 2-stroke 6-cylinder

- 250hp Long EFI (2004-2005) 2-stroke 3 litre 6-cylinder

- 250XB EFI (2000-2002) 2-stroke 3 litre 6-cylinder

- V-250 250hp EFI (1995-2006) 2-stroke 3 litre 6-cylinder (OG129222 & Up)

This kit ensures long-lasting water pump operation and is ideal for annual maintenance or repair of worn cooling system components. All components are made from marine-grade materials and designed to meet or exceed OEM standards.