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863631T1 Distribution Housing for Mercury Mercruiser 4.3 5.0 5.7 6.2L Inboard
$54.39
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Equipment Fitment
Review the equipment and model information below. Fitment can vary by serial number, production date, or machine configuration, so confirm your model and reference numbers before ordering.
Equipment / model
- Mercury/Mercruiser 4.3L V6 inboard engines
- Mercury/Mercruiser 5.0L V8 inboard engines
- Mercury/Mercruiser 5.7L V8 inboard engines
- Mercury/Mercruiser 6.2L V8 inboard engines
Product Overview
This Water Distribution Housing routes coolant from the engine block to manifolds and exhaust elbows on Mercury and Mercruiser 4.3L, 5.0L, 5.7L, and 6.2L inboard marine engines. The housing maintains proper cooling flow and pressure, preventing hot spots and overheating. Built as a direct OEM-spec replacement, this water distribution housing restores cooling system integrity for boat owners and marine mechanics.
Key Features & Performance
- Precision-cast to match OEM dimensions and port alignment for bolt-on installation
- Corrosion-resistant material formulation suited for fresh and saltwater environments
- Maintains consistent coolant flow to both cylinder banks and exhaust risers
- Reinforced mounting flanges resist warping and sealing face distortion
- Accepts standard marine gaskets and hose connections without modification
Common Uses
- Replacing a cracked, leaking, or corroded water distribution housing
- Restoring proper coolant distribution during an engine rebuild or repower
- Servicing raw-water or closed cooling systems on stern drive and inboard setups
- Addressing uneven engine temperatures caused by a restricted housing
- Preventative maintenance when upgrading hoses and thermostats
Technical Specifications
- Part Number(s): 863631T1
- Compatible Engine Sizes: 4.3L, 5.0L, 5.7L, 6.2L
- Application: Inboard marine engines
Frequently Asked Questions
Q: Does this housing work with both raw water and closed cooling systems? A: Yes, it is designed for standard inboard cooling circuits and functions in both raw water and closed cooling configurations.
Q: Are gaskets included with this water distribution housing? A: No, gaskets are sold separately; use OEM or equivalent marine-grade gaskets for a leak-free seal.
Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.