19210-ZW1-B04 Honda Marine Impeller | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda 75HP-150HP Water Pump Impeller - Part Number: 19210-ZW1-B04

New genuine Honda flexible water-pump impeller for BF75 through BF150 outboards using the ZW1 pump family.

⚙️ Key Features

• Genuine Honda flexible seawater impeller
• Correct high-flow vane and hub design for ZW1 pumps
• Used in several 75HP-150HP four-stroke families
• Install with correct key, housing, liner and O-rings
• Direct service replacement for earlier B02/B03 impellers

🚤 Compatibility

Commonly used on

• Honda Marine four-stroke outboard engines

Typically suits

• Engine models:
• BF75A/BF75D and BF80A
• BF90A/BF90D and BF100A
• BF115A/BF115D and BF130A
• BF135A/BF135D and BF150A/BF150D
• HP Range: 75HP - 150HP
• Engine Type: Honda four-stroke outboard
• Year Range: Model, shaft and pump-housing revision dependent

🔌 Function

The flexible water-pump impeller draws raw water through the gearcase intake and circulates it through the engine cooling passages and exhaust system. Its flexible vanes must seal against the pump liner and cam to maintain reliable cooling flow from idle through maximum engine speed.

⚠️ Common Signs of Failure

• Weak or absent tell-tale stream
• Engine temperature rises above normal or the overheat alarm activates
• Impeller vanes are cracked, missing, swollen or permanently set
• Pump housing contains scoring, melted rubber or vane fragments
• The annual or manufacturer-specified water-pump service interval is due

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 19210-ZW1-B04 → Supersedes 19210-ZW1-B03 and 19210-ZW1-B02

OEM / Related Numbers

• 19210-ZW1-B02
• 19210-ZW1-B03
• 19210-ZW1-B04

Aftermarket / Verified Equivalents

• Sierra: 18-3250
• Mallory: 9-45104
• CEF: 500337
• JMP/Allmar: 47-09123
• Recmar: REC19210-ZW1-B04

📦 Condition

• Genuine Honda part
• Brand new
• Supplied in original or equivalent packaging