The Honda 89221-KW3-000 Hexagon Wrench (4MM) is a genuine OEM service tool designed for a wide range of Honda portable outboard motors, horizontal shaft engines, trimmers, and water pumps. This is the correct 4MM hex wrench sourced directly from Honda, covering models including BF8, BF9, BF15, BF20, BFP8, BFP9, BFP15, BFP20, GX25, GX35, GX50, HHT25, UMC425, UMC435, UMK422, UMK431, and WX10. Because Honda applies part number 89221-KW3-000 across multiple product lines, buyers should confirm the wrench size matches their specific service requirement before ordering. Keeping the correct OEM tool on hand means fasteners are turned with the right fit, reducing the risk of rounding out recessed hex hardware during maintenance.
Key Features
- Correct 4MM Drive Engagement — the hex profile is dimensioned to Honda's own fastener spec, so the key seats fully and turns recessed bolts without slipping or damaging the socket head
- Genuine Honda OEM Tool — supplied under Honda part number 89221-KW3-000, this wrench is the same item Honda specifies for servicing these products on the factory parts list
- Broad Cross-Product Fitment — listed for BF- and BFP-series portable outboards, GX25, GX35, and GX50 mini 4-stroke engines, Honda trimmers, and the WX10 water pump, making it a practical addition to any Honda service kit
- Check Your Serial Number — Honda updates parts lists at serial breaks; verify your model and serial number against the fitment table to confirm part number 89221-KW3-000 is current for your specific unit
A hex wrench — also known as an Allen key — is a compact, L-shaped tool used to drive fasteners with a recessed internal hexagonal socket. On Honda portable outboards, mini engines, trimmers, and pumps, several service points use small-diameter socket-head bolts that require a correctly sized hex key to remove and reinstall without damaging the fastener. Using a worn or incorrectly sized wrench on these recessed fasteners risks rounding the socket, making subsequent removal difficult or impossible. Having the correct OEM-specified wrench available before beginning any service keeps maintenance straightforward and fastener hardware intact.
Part Details
| Part Number | 89221-KW3-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Hexagon Wrench (4MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX25, GX35, GX50 | All |
| Portable Outboard Motor | BF8, BF9, BF15, BF20, BFP8, BFP9, BFP15, BFP20 | All |
| Trimmer | HHT25, UMC425, UMC435, UMK422, UMK431 | All |
| Water Pump | WX10 | 1000001-1007818 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
