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676-45111-15-4D 676-45111-00-4D 676-45111-10-4D 676-45111-20-4D
PREMARINE
| Quantity: | |
|---|---|
| Parameter | Specification |
| Part Number | 676-45111-15-4D (Supersedes: 676-45111-00-4D, 676-45111-10-4D, 676-45111-20-4D, 676-45111-15-00) |
| Compatible Brand | Yamaha Marine |
| Component Type | Outboard Upper Casing / Drive Shaft Housing Assembly |
| Engine Type | 2-Stroke Outboard Engines (40HP Series) |
| Material | Marine-Grade Corrosion-Resistant Aluminum Alloy with Metallic Grey Finish (-4D) |
| Manufacturing Process | Precision Vacuum Die Casting, CNC Flashing & Multi-Layer Marine Coating |
| Installation | Direct OEM Bolt-On Replacement |
High Structural Rigidity: Heavy-duty aluminum construction resists intense engine operational vibrations, propeller thrust, and hydrodynamic impact forces without cracking or warping.
Marine Corrosion Protection (-4D): Coated with Yamaha OEM-spec metallic grey finish (-4D), offering superior protection against saltwater corrosion, galvanic oxidation, and paint peeling.
Precision CNC Mating Flanges: CNC-machined top and bottom mounting surfaces ensure a leak-proof seal with powerhead base gaskets and lower unit gearcases, securing cooling water and exhaust flow paths.
Primarily compatible with Yamaha 2-stroke 40HP outboard engine platforms (featuring 676 and related model codes):
Yamaha 2-Stroke 40HP Series: 40C, 40D, E40G, E40J (2-cylinder / 3-cylinder 2-stroke outboard platforms).
PREMARINE Direct Replacement: PREMARINE manufactures high-precision aftermarket upper casings engineered to exact OEM 676-45111 flange patterns, bolt spacings, and internal exhaust passage specs for seamless engine assembly.
PREMARINE Quality & Marine Protection: Built with upgraded saltwater-resistant aluminum alloys and durable baked-on paints, PREMARINE drive shaft housings deliver outstanding reliability and exceptional value for Yamaha 40HP rebuilds.
Casing Corrosion Pitting & Exhaust Leakage: Extended saltwater exposure without flushing can cause internal water passage corrosion and wall perforation, leading to loud exhaust leaks and cooling water loss. Replace the corroded housing.
Structural Cracking or Flange Distortion: Underwater impacts or loose mounting hardware create stress cracks along housing mounting flanges, compromising structural safety and sealing integrity.
Stripped Bolt Threads & Corrosion Seizure: Seized or broken mounting bolts that strip internal housing threads during service require replacing the upper casing assembly to ensure proper bolt torque.
OEM Part Numbers
Compatible OEM references include:
676-45111-15-4D
676-45111-10-4D
676-45111-20-4D
676-45111-00-4D
Compatible Engine Models
This Upper Casing is primarily designed for:
2-Stroke 40HP
If you are unsure about compatibility, please provide your engine model number or identification plate for verification before ordering.
Applications
This Upper Casing 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
