Water Pump Service Kit - Yamaha 50-70 HP (1984-1991, 1996) OEM# 18-3428-1 | WSM 725-420

Water Pump Service Kit Yamaha 50 - 70 Hp OEM# 18-3428-1

This WSM water pump service kit is a quality aftermarket replacement part designed for Yamaha 3 Cyl 2.834 Bore 60 and 2 other compatible models.

It replaces selected OEM reference numbers including 18-3428-1, 18-3465, 6H3-W0078-00-00, 6H3-W0078-02-00, 6H3-W0078-A0-00 and is suitable for service, repair and rebuild work.

Key Features

• Quality aftermarket replacement part from WSM
• Engineered for dependable fit, function and service life
• Designed for marine and powersports repair and maintenance
• Compatible with 10 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 725-420
• Product: Water Pump Service Kit
• OEM Reference: 18-3428-1, 18-3465, 6H3-W0078-00-00, 6H3-W0078-02-00, 6H3-W0078-A0-00
• Application: Yamaha 3 Cyl 2.834 Bore 60 and 2 other compatible models

Product Fitment

This part is suitable for the following models:

• Yamaha 3 Cyl 2.834 Bore 60 – 1991
• Yamaha 3 Cyl 2.834 Bore 70 – 1984
• Yamaha 3 Cyl 2.834 Bore 70 – 1985
• Yamaha 3 Cyl 2.834 Bore 70 – 1986
• Yamaha 3 Cyl 2.834 Bore 70 – 1987
• Yamaha 3 Cyl 2.834 Bore 70 – 1988
• Yamaha 3 Cyl 2.834 Bore 70 – 1989
• Yamaha 3 Cyl 2.834 Bore 70 – 1990
• Yamaha 3 Cyl 2.834 Bore 70 – 1991
• Yamaha 4 Cyl 4 Stroke 50 – 1996

Why Buy WSM

WSM is a trusted manufacturer of aftermarket marine and powersports parts, known for dependable quality, strong fitment coverage and workshop-ready replacement components.

You May Also Need

Browse related parts for compatible models:

• Voltage Regulator Yamaha 40 - 70 / 1200 92-09 OEM# 6H2-81960-00-00 – 004-281
• Upper Rod Washer Yamaha 25 - 90 Hp OEM# 010-181W – 010-162W
• Water Pump Housing Yamaha 50 - 70 Hp OEM# 6H3-44311-00-00 – 710-420
• Water Pump Kit Complete Yamaha 50 - 70 Hp OEM# 18-3466 – 750-420

Please use the fitment guide, OEM references and images to confirm this is the correct part before ordering.