Water Distribution Housing Mercury/ Mercruiser 4.3/5.0/5.7/6.2L Inboard 863631T1
Water Distribution Housing Mercury/ Mercruiser 4.3/5.0/5.7/6.2L Inboard 863631T1
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Water Distribution Housing for Mercury/Mercruiser
This water distribution housing routes coolant through Mercury/Mercruiser 4.3L, 5.0L, 5.7L, and 6.2L inboard engines, directly replacing OEM part 863631T1.
Overview
The water distribution housing is a critical cooling-system component for marine inboard engines. It replaces cracked or corroded OEM housings on Mercury and Mercruiser 4.3L, 5.0L, 5.7L, and 6.2L V6 and V8 sterndrive models. This direct-fit water distribution housing matches factory specifications and includes the molded hose connections needed for a clean install.
Built For Performance
- Corrosion-resistant cast-aluminum construction withstands raw-water and coolant exposure.
- Precision-machined gasket surface ensures a leak-free seal.
- Direct bolt-on replacement that requires no drilling or modifications.
- High-flow internal passages reduce hot spots and improve circulation.
- Manufactured to OEM dimensions for accurate fit on 4.3L, 5.0L, 5.7L, and 6.2L blocks.
Fits These Machines
- for Mercury/Mercruiser 4.3L Inboard
- for Mercury/Mercruiser 5.0L Inboard
- for Mercury/Mercruiser 5.7L Inboard
- for Mercury/Mercruiser 6.2L Inboard
On-The-Job Use
- Replacing a cracked or leaking water distribution housing on inboard and sterndrive boats.
- Marine cooling system overhaul after raw-water corrosion damage.
- Performance rebuilds of Mercruiser V6 and V8 engines.
- Preventative maintenance when changing intake manifolds or exhaust elbows.
Specs At A Glance
| Part Number(s) | 863631T1 |
| Engine Compatibility | Mercury/Mercruiser 4.3L, 5.0L, 5.7L, 6.2L Inboard |
Good To Know
Q: How do I know if this fits my Mercruiser engine? A: Check your engine’s serial number or original housing for part number 863631T1; this housing fits 4.3L, 5.0L, 5.7L, and 6.2L inboard models.
Q: Are mounting bolts included? A: Bolts are not included. Reuse your existing hardware or source standard marine-grade bolts separately.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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