Mercury Marine Catalog - Cylinder Heads

383 Cylinder Head
Your Price:
$868.75

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

383 Cylinder Head

525-938-8M0115139

383 Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • 8-bolt intake manifold pattern
  • Upgraded ports for higher airflow
  • Beehive valve springs - 6000 RPM Rev Limit with 0.555" lift
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Features Black-X Composite valves for 42% Longer Life
    • 1.94" Intake
    • 1.50" Exhaust

For: 383 4V MCM/MIE Plus Series, 383-CT Circle Tank

Supercedes: 8M0060620


385 Performance Tune Cylinder Head
Your Price:
$1,118.75

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

385 Performance Tune Cylinder Head

525-938-8M0115140

385 Performance Tune Cylinder Head

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • 8-bolt intake manifold pattern
  • Upgraded ports for higher airflow
  • Beehive valve springs - 6000 RPM Rev Limit with 0.555" lift
  • Screw in rocker studs
  • Marine grade brass core plugs
  • Performance Tune Valves - for up to 700 HP - Boosted Applications
    • 1.94" Intake - 24N with Chromium / Cobalt alloy seats
    • 1.50" Exhaust - Nickel Super-Alloy

For: 385 Performance Tuned Plus Series, 5.7 L31 Pressure Charged


540 Cylinder Head - 2.19" Valves
Your Price:
$1,493.75

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

540 Cylinder Head - 2.19" Valves

525-938-8M0115142

540 Cylinder Head - 2.19" Valves

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Rectangular intake ports
  • 540 Plus Series or Big Block Gen V & VI Boosted Applications
  • Not for Mark IV
  • Heavy duty valve springs - 5500 RPM Rev Limit
  • 2.19" intake valve
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Black-X Composite Valves for 42% Longer Life

For: 540 Mag Bravo 4V Plus Series

Supercedes: 900-8M0094193


540 Cylinder Head - 2.25" Intake Valve
Your Price:
$1,743.75

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

540 Cylinder Head - 2.25" Intake Valve

525-938-8M0115143

540 Cylinder Head - 2.25" Intake Valve

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Rectangular intake ports
  • HP 500, 500 EFI, & 540 Bulldog Big Block Gen V & VI Boosted Applications
  • Not for Mark IV
  • HP 500, 500 EFI, & 540 Bulldog Big Block Gen V & VI Boosted Applications
  • 2.19" intake valve
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Manley Severe Duty valves

For: HP 500 & 500 EFI, 540 MAG Crate Engines


8.1L Cylinder Head - Driver Side
Your Price:
$2,187.50

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

8.1L Cylinder Head - Driver Side

525-900-8M0091709

8.1L Cylinder Head - Driver Side

  • All new Quicksilver cast iron cylinder head with hardened valve seats
  • Heavy duty valve springs - 5200 RPM Rev Limit
  • Screw in rocker studs & push rod guides
  • Marine grade brass core plugs
  • Features Black-X Composite Valves for 42% Longer Life

For: 2000-2009 MCM 496 & 496 HD, 2000-2009 MIE 8.1S Horizon & 8.1S HO, 496 HO MPI Plus Series, 8.1L Horizon Plus Series, 8.1L L18


CYLINDER HEAD COM Mercruiser 900-880536A18
Your Price:
$3,802.86

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Complete Cylinder Head 900-880536A18

525-900-880536A18

Mercruiser Complete Cylinder Head  900-880536A18


HEAD ASY-COMPLETE Mercruiser 900-880536A10
Your Price:
$4,248.36

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Complete Head Assembly 900-880536A10

525-900-880536A10

Complete Head Assembly 900-880536A10



CYL HEAD-BLACK Mercruiser 900-8M0070288
Your Price:
$4,017.45

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Black) 900-8M0070288

525-900-8M0070288

Mercruiser Cylinder Head (Black) 900-8M0070288



CYL HEAD-BLACK Mercruiser 900-8M0070289
Your Price:
$4,017.45

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Black) 900-8M0070289

525-900-8M0070289

Mercruiser Cylinder Head (Black) 900-8M0070289



CYL HEAD-PORT Mercruiser 900-8M8025141
Your Price:
$457.76

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Port) 900-8M8025141

525-900-8M8025141

Mercruiser Cylinder Head (Port) 900-8M8025141



CYL HEAD-STBD Mercruiser 900-8M8025142
Your Price:
$1,378.03

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head (Starboard) 900-8M8025142

525-900-8M8025142

Mercruiser Cylinder Head (Starboard) 900-8M8025142



CYLINDER HEAD Mercruiser 900-835430T03
Your Price:
$494.93

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-835430T03

525-900-835430T03

Mercruiser Cylinder Head 900-835430T03



Cylinder Head 900-841020A08
Your Price:
$539.00

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-841020A08

525-900-841020A08

CYLINDER HEAD Mercruiser 900-841020A08

Supersedes: 900-841020A2
900-841020A04

Supercedes: 900-841020A2, 900-841020A04


CYLINDER HEAD Mercruiser 900-845403A02
Your Price:
$789.33

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-845403A02

525-900-845403A02

CYLINDER HEAD Mercruiser 900-845403A02


CYLINDER HEAD Mercruiser 900-845404A02
Your Price:
$778.60

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-845404A02

525-900-845404A02

CYLINDER HEAD Mercruiser 900-845404A02


CYLINDER HEAD Mercruiser 900-879172206
Your Price:
$767.33

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-879172206

525-900-879172206

CYLINDER HEAD Mercruiser 900-879172206

Supersedes: 900-898101415


CYLINDER HEAD Mercruiser 900-880536A16
Your Price:
$1,922.86

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-880536A16

525-900-880536A16

CYLINDER HEAD Mercruiser 900-880536A16


CYL HEAD-BARE Mercruiser 900-8M0061735
Your Price:
$1,699.93

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head 900-8M0061735

525-900-8M0061735

Mercruiser Cylinder Head 900-8M0061735



Cylinder Head Assembly 5.7L Mercruiser 938-883490R1
Your Price:
$1,135.70

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

Cylinder Head Assembly 5.7L Mercruiser 938-883490R1

525-938-883490R1

Cylinder Head Assembly 5.7L Mercruiser 938-883490R1

Supersedes: 938-884741R

Fully Assembled Remanufactured Cylinder Head (Brand new head casting)
Fits: MCM/MIE (1987‑1996) 5.7L (non‑Gen +) engines

Supercedes: 938-884741R50, 938-884741R


CYLINDER HEAD ASY Mercruiser 8M0046344
Your Price:
$4,757.07

This Part has options, please click the button below to order.

Special Order OEM Mercruiser Parts can take up to 7-10 business days to ship.

CYLINDER HEAD ASY Mercruiser 8M0046344

525-900-8M0046344

Cylinder Head Assembly Mercruiser 8M0046344