The Honda 91301-MJ0-003 O-Ring (7.8X1.9) is a genuine OEM sealing component designed for a wide range of Honda BF-series outboard motors and the E300 generator. As an authentic Honda part, this O-Ring is manufactured to the exact dimensions and material specifications required for a proper seal in the original assembly. This O-Ring is listed for models including BF40, BF50, BF60, BF75, BF90, BF100, BF115, BF130, BF135, BF140, BF150, BF175, BF200, BF225, BF250, BFP60, and the E300 generator — always confirm part number 91301-MJ0-003 against your machine's serial number before ordering, as Honda supersedes parts at production breaks.
Key Features
- Genuine OEM Sealing Integrity — manufactured to Honda's exact dimensional specification of 7.8 x 1.9 mm, ensuring the correct cross-section and compression set for a proper fluid-tight seal
- Direct OEM Replacement — drops into the original sealing groove without modification, restoring the assembly to its factory-sealed condition
- Broad Fitment Across Honda's BF Outboard Line — listed for multiple BF-series outboard motors from the BF40 through the BF250, as well as the E300 generator; confirm your serial number against the fitment table to ensure this is the correct part for your unit
- Critical Leak Prevention — a correctly seated O-Ring prevents fluid loss and ingress at the sealed joint; a deteriorated or incorrectly sized ring leads to leaks that can compromise performance and cause internal damage over time
An O-Ring is a simple but critical loop-shaped seal seated in a machined groove between two mating surfaces or around a fitting. When compressed during assembly, it blocks the passage of fluids — whether oil, water, or fuel — at that joint. In outboard motors, O-Rings appear throughout the powerhead, gearcase, and cooling system, where any breach in the seal can allow water ingestion or fluid loss. A worn, cracked, or incorrectly sized O-Ring loses its ability to maintain compression against the groove walls, allowing leaks that can escalate quickly into more serious mechanical problems if left unaddressed.
Part Details
| Part Number | 91301-MJ0-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | O-Ring (7.8X1.9) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | E300 | 1058041-1106000 |
| Outboard Motor | BF40, BF50, BF60, BF75, BF90, BF115, BF130, BF135, BF140, BF150, BF175, BF200, BF225, BF250, BFP60 | All |
| Portable Outboard Motor | BF100 | All |
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.
