22863786A1 Mercury MerCruiser T Fitting Exhaust Drain Valve | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver T Fitting Exhaust Drain Valve - Part Number: 22-863786A1

Genuine Quicksilver/Mercury MerCruiser exhaust manifold drain T fitting assembly used in the raw-water drain system on selected MerCruiser MPI V6 and V8 petrol engines. This fitting is fitted into the exhaust manifold / elbow drain circuit and provides a serviceable drain point for removing cooling water from the exhaust system during flushing, winterisation, storage or routine maintenance.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM fitting assembly

• Exhaust manifold drain T fitting with drain valve function

• Designed for selected MerCruiser MPI V6 and V8 petrol engines

• Commonly used on 4.3L, 5.0L, 5.7L / 350 MAG and 6.2L MPI exhaust drain systems

• Helps drain raw water from the exhaust manifold circuit for maintenance and freeze protection

• Direct replacement for the original MerCruiser exhaust drain fitting where 22-863786A1 is specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• No available supersession chain

OEM / Related Numbers:

• 22-863786A1

• 863786A1

• 22863786A1

• 22-05158 related drain T fitting reference

• 25-864701 related O-ring used in matching exhaust manifold drain assemblies

Aftermarket / Verified Equivalents:

• REC: REC22-863786A1

• EMP: 22-05158

🚤 Compatibility

Commonly used on:

• Mercury MerCruiser MPI V6 and V8 petrol exhaust manifold drain systems

• MerCruiser standard cooling and selected closed-cooling exhaust manifold drain assemblies

• MerCruiser dry-joint exhaust manifold drain systems where 22-863786A1 is specified

Typically suits:

• Engine models:

• MerCruiser 4.3L MPI Alpha / Bravo, serial range 0M300000 - 0M614999

• MerCruiser 4.3L MPI Alpha / Bravo, serial range 0W310000 - 0W649999

• MerCruiser 4.3L MPI Alpha / Bravo, serial range 0W650000 - 0W658582

• MerCruiser 4.3L MPI Alpha / Bravo, serial 0W658583

• MerCruiser 4.3L MPI Alpha / Bravo, serial range 0W658584 - 1A030367

• MerCruiser 4.3L MPI Alpha / Bravo, serial range 1A030368 - 1A030369

• MerCruiser 4.3L MPI Alpha / Bravo, serial range 1A030370 - 1A063239

• MerCruiser 4.3L MPI Alpha / Bravo, serial range 1A063240 and up

• MerCruiser 4.3L MPI Alpha / Bravo EC, serial range 1A637496 and up

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 0M300000 - 0M599999

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 0M600000 - 0W059999

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 0W060000 - 0W309999

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 0W310000 - 0W649999

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 0W650000 - 1A299999

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 1A300000 - 1A611927

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 1A611928 - 1A623184

• MerCruiser 5.0L MPI Alpha / Bravo, serial range 1A623185 and up

• MerCruiser 5.0L MPI Alpha / Bravo EC, serial range 1A300000 - 1A611927

• MerCruiser 5.0L MPI Alpha / Bravo EC, serial range 1A611928 - 1A623184

• MerCruiser 5.0L MPI Alpha / Bravo EC, serial range 1A623185 and up

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 0M300000 - 0M599999

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 0M600000 - 0W059999

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 0W060000 - 0W309999

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 0W310000 - 0W649999

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 0W650000 - 1A299999

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 1A300000 - 1A611927

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 1A611928 - 1A623184

• MerCruiser 350 MAG MPI Alpha / Bravo, serial range 1A623185 and up

• MerCruiser 350 MAG MPI Alpha / Bravo EC, serial range 1A300000 - 1A611927

• MerCruiser 350 MAG MPI Alpha / Bravo EC, serial range 1A611928 - 1A623184

• MerCruiser 350 MAG MPI Alpha / Bravo EC, serial range 1A623185 and up

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo, serial range 0M300000 - 0M599999

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo, serial range 0M600000 - 0W059999

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo, serial range 0W060000 - 0W309999

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo, serial range 0W310000 - 0W649999

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo, serial range 0W650000 - 1A299999

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo EC, serial range 1A300000 - 1A611927

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo EC, serial range 1A611928 - 1A623184

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo EC, serial range 1A623185 and up

• MerCruiser 350 MAG MPI MIE, serial range 0M310000 - 0M316999

• MerCruiser 350 MAG MPI MIE, serial range 0M317000 - 0M398371

• MerCruiser 350 MAG MPI MIE, serial range 0M398372 - 0W389999

• MerCruiser 350 MAG MPI MIE, serial range 0W390000 - 0W689999

• MerCruiser 350 MAG MPI MIE, serial range 0W690000 - 1A089999

• MerCruiser 350 MAG MPI Horizon MIE, serial range 0M310000 - 0M316999

• MerCruiser 350 MAG MPI Horizon MIE, serial range 0M317000 - 0M398371

• MerCruiser 350 MAG MPI Horizon MIE, serial range 0M398372 - 0W389999

• MerCruiser 350 MAG MPI Horizon MIE, serial range 0W390000 - 0W689999

• MerCruiser 350 MAG MPI Horizon MIE, serial range 0W690000 - 1A089999

• MerCruiser 350 MAG MPI Ski, serial range 0M300000 - 0M316999

• MerCruiser 350 MAG MPI Ski, serial range 0M317000 - 0W689999

• MerCruiser 5.7L MPI MIE, serial range 1A090000 - 1A092168

• MerCruiser 5.7L MPI MIE, serial range 1A092169 and up

• MerCruiser 5.7L MPI Horizon MIE, serial range 1A090000 - 1A092168

• MerCruiser 5.7L MPI Horizon MIE, serial range 1A092169 and up

• MerCruiser 5.7L MPI TowSport with Gen III, serial range 1G400000 - 1G499999

• MerCruiser 6.2L MPI Ski, serial range 0M317000 - 0W689999

• MerCruiser MX 6.2L MPI Bravo, serial range 0M300000 - 0M599999

• MerCruiser MX 6.2L MPI Bravo, serial range 0M600000 - 0W059999

• MerCruiser MX 6.2L MPI Bravo, serial range 0W060000 - 0W309999

• MerCruiser MX 6.2L MPI Bravo, serial range 0W310000 - 0W649999

• MerCruiser MX 6.2L MPI Bravo, serial range 0W650000 - 1A299999

• MerCruiser MX 6.2L MPI Horizon Bravo, serial range 0M300000 - 0M599999

• MerCruiser MX 6.2L MPI Horizon Bravo, serial range 0M600000 - 0W059999

• MerCruiser MX 6.2L MPI Horizon Bravo, serial range 0W060000 - 0W309999

• MerCruiser MX 6.2L MPI Horizon Bravo, serial range 0W310000 - 0W649999

• MerCruiser MX 6.2L MPI Horizon Bravo, serial range 0W650000 - 1A299999

• MerCruiser MX 6.2L MPI MIE, serial range 0W690000 - 1A089999

• MerCruiser MX 6.2L MPI Horizon MIE where fitted with the matching exhaust manifold drain assembly

• MerCruiser Black Scorpion 350 MAG MPI where fitted with the matching exhaust manifold drain assembly

• MerCruiser Black Scorpion MX 6.2L MPI where fitted with the matching exhaust manifold drain assembly

• MerCruiser Scorpion 350 EC where fitted with the matching exhaust manifold drain assembly

• MerCruiser Scorpion 377 HO EC where fitted with the matching exhaust manifold drain assembly

• MerCruiser 350 MPI Alpha reman, serial range 1G400000 - 1G499999

• MerCruiser 383 MAG Stroker reman, serial range 1G400000 - 1G499999

• MerCruiser 383 MAG Stroker Bravo reman, serial range 1G400000 - 1G499999

• HP Range: Approximately 190HP - 377HP, depending on engine package

• Engine Type: MerCruiser petrol MPI V6 / V8 stern drive, inboard and tow-sport exhaust manifold drain system

• Year Range: Approximately 2001 onwards, depending on engine model, serial number and cooling configuration

🔌 Function

The exhaust drain T fitting provides a drain point in the MerCruiser exhaust manifold water circuit. It allows cooling water to be drained from the manifold and elbow area during service, storage, flushing or freeze-protection procedures. A correctly functioning drain fitting helps prevent trapped water, corrosion, cracking from freezing and poor drainage during maintenance.

Common signs of failure:

• Water leaking from the exhaust manifold drain fitting

• Cracked, brittle or heat-damaged fitting body

• Drain valve blocked with salt, sand or corrosion

• Exhaust manifold not draining correctly during service

• Difficulty winterising or flushing the exhaust water circuit

• Visible damage or missing drain fitting components

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging