Manual Drain Water Distribution Housing 863631T1 for Mercury MerCruiser 4.3L 5.0L 5.7L 6.2L MPI Inboard — United States Local Warehouse
Manual Drain Water Distribution Housing 863631T1 for Mercury MerCruiser 4.3L 5.0L 5.7L 6.2L MPI Inboard — United States Local Warehouse
Product Overview
Manual drain water distribution housing for Mercury MerCruiser inboard and sterndrive engines, the part that replaces 863631T1 and 863802T2. It fits the 4.3 L 262 CID, 5.0 L 305 CID, 5.7 L 350 CID and 6.2 L 377 CID MPI motors, including the 350 MAG MPI, 377 MAG MPI and 383 MAG Stroker. Shipped from our United States local warehouse.
The housing is a small manifold bolted to the engine with a valve on each drain point. Instead of pulling brass plugs on the block and both manifolds at the end of the season, you open three or four blue handles, let the water run out, and close them again. On a boat used in salt or brackish water that turns winterising from a twenty minute job into a two minute one.
These housings fail at the valves rather than the body. The plastic handles crack, the valve seats scale up, and the first sign is usually a slow drip onto the engine after a run rather than a burst. Once a valve will not close completely, the engine cannot hold its coolant and the block drains itself into the bilge.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Manual drain water distribution housing |
| Engine | Mercury MerCruiser MPI inboard and sterndrive |
| Displacement | 4.3 L, 5.0 L, 5.7 L, 6.2 L |
| Drain Type | Manual valves |
| Quantity | 1 housing |
| Packaging Size | 21 x 16.5 x 10 cm (8.3 x 6.5 x 3.9 in) |
| Country of Origin | Taiwan |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| MerCruiser | 863631T1, 863802T2 |
Displacement Chart
| Engine | Litres | CID | Layout |
|---|---|---|---|
| GM 4.3 L MPI | 4.3 L | 262 CID | V6 |
| GM 5.0 L MPI | 5.0 L | 305 CID | V8, Alpha and Bravo EC |
| GM 5.7 L MPI | 5.7 L | 350 CID | V8, MAG, Horizon, MIE, Ski |
| GM 6.2 L MPI | 6.2 L | 377 CID | V8, Scorpion, Horizon, MIE, Ski |
Compatible Engines
| Model | Application |
|---|---|
| 350 MAG MPI | Alpha and Bravo, Horizon, MIE, Ski |
| 377 MAG MPI | Bravo |
| 383 MAG Stroker | Bravo |
| GM 4.3 L MPI 262 CID | V6 |
| GM 5.0 L MPI 305 CID | V8 Alpha and Bravo EC |
| GM 5.7 L MPI 350 CID | V8 MAG, Horizon, MIE, Ski |
| GM 6.2 L MPI 377 CID | V8 Scorpion, Horizon, MIE, Ski |
Winterising with Manual Drains
| Step | Action |
|---|---|
| 1 | Run the engine on flush muffs with fresh water first |
| 2 | Switch off and let the engine cool before opening anything |
| 3 | Open every valve on the housing and let the block drain |
| 4 | Open the manifold drains separately, they hold water of their own |
| 5 | Probe each drain with a wire, scale and sand block them |
| 6 | Leave the valves open through the freeze, or fill with antifreeze |
| 7 | Close the valves in spring before the engine is started |
Signs the Housing Needs Replacing
| Symptom | What It Points To |
|---|---|
| Drip from a valve after a run | Valve seat scaled or the handle cracked |
| A valve will not turn | Handle seized on the spindle |
| Water in the bilge after winterising | Drain left open, or a valve passing |
| Coolant will not stay in the engine | Valve not seating, block draining itself |
| Cracks around the hose spigots | Housing overheated or frozen with water inside |
What's Included
| Component | Qty |
|---|---|
| Water distribution housing | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Shipping from United States
| Destination | Warehouse | Note |
|---|---|---|
| United States | United States local warehouse | Domestic delivery, no import duty |
| Canada | United States local warehouse | Customs may apply |
| Mexico | United States local warehouse | Customs may apply |
Before You Buy
- Confirm the engine is an MPI motor, the carburetted models use a different drain setup
- Check the number on the old housing, 863631T1 or 863802T2
- Check the hose spigot size against the hoses already on the engine
- Close every valve and check for leaks before the first run
- This is the housing only, hoses and clamps are not included
- Flush with fresh water after salt use, scale is what kills the valves
- 30-Day Easy Returns
- Ships from our United States local warehouse
Verfügbarkeit für Abholungen konnte nicht geladen werden
23 auf Lager
Vollständige Details anzeigen
Boat Owners' Review
Before You Buy
Frequently Asked Questions
What is your refund policy?
We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
How does shipping work?
Free international shipping on every order — no minimums. We operate a global warehouse network with a main distribution centre in Asia (10-20 business days). We also hold stock in regional warehouses across the United States, Germany, the United Kingdom, Australia, and Poland (opening soon) — most orders arrive in 1-3 business days within those countries and in 2-8 business days to nearby regions. Tracking included.
See our full Shipping Policy.
How do you keep prices fair?
We cut out the middlemen. XRmarine sources directly from quality manufacturers and sells at honest prices. Same OEM-quality parts, no dealership markup. Every order comes with free shipping, real expert support, and a 1-year warranty.
Learn more on our About Us page.
What payment methods do you accept?
We currently accept PayPal — a fast, secure way to pay online. Credit card payments (Visa, Mastercard, American Express) and Shopify Payments are being set up and will be available soon. We appreciate your patience.