31754-ZY9-000 Honda Marine Regulator Gasket | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda BF75D / BF80A / BF90D / BF100A Regulator-Rectifier Gasket - Part Number: 31754-ZY9-000

A genuine Honda packing gasket fitted beneath the regulator-rectifier on the ZY9 inline-four outboard electrical system. It seals and cushions the regulator mounting interface while helping protect the component and connection area from moisture and contamination.

⚙️ Key Features

• Genuine Honda regulator-rectifier mounting gasket
• Matched to regulator-rectifier assembly 31750-ZY9-003
• Correct mounting-hole and sealing profile
• Recommended replacement whenever the regulator is removed

🚤 Compatibility

Commonly used on

• Honda BF75DK4
• Honda BF80AK1
• Honda BF90DK3 and BF90DK5
• Honda BF100AK1
• Other BF75D/BF80A/BF90D/BF100A revisions only where the electrical diagram lists 31754-ZY9-000

Typically suits

• HP Range: 75-100 HP
• Engine Type: Inline four-cylinder EFI four-stroke outboard
• Year Range: 2007 onward, revision dependent
• Serial / Identification Range: Confirm the complete engine model suffix, frame serial and installed regulator number 31750-ZY9-003.

🔌 Function

Seals and cushions the regulator-rectifier mounting surface, reducing moisture entry and supporting correct installation of the charging-system component.

⚠️ Common Signs of Failure

• Gasket is torn, crushed or missing during regulator service
• Moisture or corrosion around the regulator connector and mounting face
• Water staining beneath the regulator
• Charging-system service requires removal of the regulator-rectifier

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 31754-ZY9-000 - current verified Honda service reference
• No later direct Honda supersession confirmed

OEM / Related Numbers

• 31754-ZY9-000
• 31754ZY9000
• 31750-ZY9-003 - related regulator-rectifier assembly

Aftermarket / Verified Equivalents

• No verified direct aftermarket gasket equivalent

📦 Condition

• Genuine Honda Marine OEM part
• Brand new
• Supplied in genuine Honda or equivalent protective packaging