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6Y1-24360-02 6Y1-24360-01 6Y1-24360-00 6Y1-24360-02-00
PREMARINE
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1. Technical Specifications
| Parameter | Specification / Detail |
| Component Type | Marine In-Line Fuel Primer Bulb / Primer Pump Assembly |
| OEM & Interchange Part Numbers | 6Y1-24360-02-00 / 6Y1-24360-02 / 6Y1-24360-01 / 6Y1-24360-00 |
| Hose Connection Size | Dual standard 8 mm (5/16-inch) Hose Barbs |
| Installation Location | In-line spliced into the 8mm fuel line between portable fuel tank and outboard |
| Engine Platform | Universally fits Yamaha 2-Stroke & 4-Stroke Outboards (2HP to 300HP+) |
| Material Composition | Marine-grade ethanol-resistant synthetic rubber (NBR/ECO), stainless steel check valve springs |
| Fluid Compatibility | Marine unleaded gasoline, ethanol-blended fuels (E10/E15), and 2-stroke premix oils |
2. Key Features & Functionality
Manual Priming & Air Purging: Squeezing the resilient bulb creates vacuum/pressure pulses that quickly pull fuel from the portable tank and prime the engine fuel system without cranking.
Dual Check Valve Unidirectional Flow: Integrated intake and discharge check valves prevent fuel drainback to the tank while maintaining prime with minimal flow restriction.
Ethanol-Shielded High-Elasticity Rubber: Formulated to withstand ethanol blends, oil mist, and marine UV exposure without hardening, swelling, or losing rapid rebound resilience.
Directional Flow Indicator: Molded-in arrow clearly indicates fuel flow direction to ensure correct in-line plumbing orientation.
3. Compatible Models
Universally compatible with Yamaha and marine fuel systems utilizing 8mm (5/16") ID hose:
Yamaha 2-Stroke Series: 2HP to 250HP outboards (e.g., 9.9F, 15F, 25B, 30G, 40X, 60F, 70B, 85A, 90A, 115A, 150A, 200A, etc.)
Yamaha 4-Stroke Series: F4 to F300 outboards (e.g., F9.9, F15, F20, F25, F40, F50, F60, F70, F115, F150, etc.)
Clone Engines & Generic Marine Lines: Fits Parsun, Hidea, Tohatsu, Powertec, and other outboard brands utilizing standard 5/16" (8mm) fuel lines
4. Aftermarket & Brand Compatibility
OEM Brand Fitment:
Yamaha Marine: Designed for genuine Yamaha outboard portable fuel line manual priming circuits.
PREMARINE Brand Aftermarket Replacement:
PREMARINE Quality Standard: PREMARINE specializes in high-durability marine fuel line hardware, primer bulbs, and check valves. This primer pump is manufactured with precision-molded synthetic elastomers and automated pressure-tested check valves.
Direct OEM-Level Performance: Vacuum suction force, check-valve seal integrity, and squeeze-recovery cycles meet or exceed OEM specifications, serving as the premier cost-effective choice for replacing stiff or leaking primer bulbs.
5. Common Symptoms & Troubleshooting
Bulb Remains Soft / Fails to Harden and Draw Fuel:
Cause: Check valve held open by fuel varnish or debris, or bulb orientation is inverted during priming.
Troubleshooting: Hold the bulb vertically with the arrow pointing upward towards the engine while pumping; replace the bulb assembly if internal check valves fail to seal.
Hardened, Cracked, or Non-Rebounding Bulb:
Cause: Solar UV damage and prolonged ethanol weathering causing elastomer stiffening.
Troubleshooting: Visually inspect for surface checking; replace sluggish or hardened bulbs immediately.
Bulb Collapses / Flattens While Engine is Running:
Cause: Fuel tank vent closed or restriction in the fuel pickup screen creating excessive vacuum.
Troubleshooting: Open the tank air vent screw and check fuel pickup filters for blockages.
OEM Part Numbers
Compatible OEM references include:
6Y1-24360-02
6Y1-24360-01
6Y1-24360-00
6Y1-24360-02-00
Compatible Engine Models
This Primer Pump Assembly is primarily designed for:
2-Stroke 2-250HP
4-Stroke 4-300HP
If you are unsure about compatibility, please provide your engine model number or identification plate for verification before ordering.
Applications
This Primer Pump Assembly is commonly used for:
Outboard engine repair
Engine rebuilding projects
Marine maintenance workshops
Boat fleet maintenance
Commercial fishing vessels
Recreational boats
Marine spare parts distribution
