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MerCruiser Engine Parts

MerCruiser Engine Parts

  • OEM Quicksilver/Mercury Thunderbolt 4 & 5 Distributor Cap   805759T 1

    OEM Quicksilver/Mercury Thunderbolt 4 & 5 Distributor Cap 805759T 1

    Mercury Marine / Quicksilver

    $62.99 $53.99
    OEM Quicksilver/Mercury Thunderbolt 4 & 5 Distributor Cap  805759T 1 Distributor cap kit 805759T1 fits marinized, V-8 MerCruiser engines made by General Motors with Thunderbolt IV and V HEI ignition systems. See your owner’s manual for...
    Part Number:
    710-805759T1
    Availability:
    In Stock - Ships same or next business day.
    Application:
    GM V-8 engines w/ Thunderbolt IV & V HEI ignitions
    $62.99 $53.99
  • OEM MerCruiser Thermostat Gasket 27-47510

    OEM MerCruiser Thermostat Gasket 27-47510

    Mercury Marine / Quicksilver

    $3.45
    MerCruiser Thermostat Gasket 27-47510 The Quicksilver Thermosat Gasket fits MCM/MIE GM V-6 & V-8 engines w/older style 2 piece thermostat housing.
    Part Number:
    710-27-47510
    Availability:
    In Stock - Ships same or next business day.
    Description:
    T-Stat Gasket: GM V-6 & V-8 engines w/older style 2-pc thermostat housing.
    $3.45
  • OEM Quicksilver / Mercury Spark Plug Red Ignition Wire Kit  84-816608Q83

    OEM Quicksilver / Mercury Spark Plug Red Ignition Wire Kit 84-816608Q83

    Mercury Marine / Quicksilver

    $107.99 $79.99
    OEM Quicksilver/Mercury Spark Plug Wire Kit   84-816608Q83 Spark plug set 816608Q83 is for use on V-8 MerCruiser engines (305, 350 and 377 CID) made by General Motors with Mercury ignition systems (1999 through 2001). T
    Part Number:
    710-84-816608Q83
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Red wires - Fits GM V-8 305/350/377 cid engines with Mercury ignition ('99 & Newer)
    $107.99 $79.99
  • OEM Quicksilver/Mercury 55A Alternator Assembly  807652T

    OEM Quicksilver/Mercury 55A Alternator Assembly 807652T

    Mercury Marine / Quicksilver

    $391.99 $289.99
    OEM Quicksilver/Mercury 55A Alternator Assembly  807652T 55 amp alternator 807652T is for V-6 and V-8 MerCruiser stern drive or inboard engines made by General Motors 1996 through 1999 using the serpentine belt drive system. See your service manual...
    Part Number:
    710-807652T
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Mando 55A: Serpentine Belt. GM 305 & 350 cid - V-6 & V-8 ('96-'99) carb engines
    Type:
    New
    $391.99 $289.99
  • OEM MerCruiser Tune Up Kit Delco Ign 34235Q 1

    OEM MerCruiser Tune Up Kit Delco Ign 34235Q 1

    Mercury Marine / Quicksilver

    $30.49 $25.99
    MerCruiser Tune Up Kit Delco Ign 34235Q 1 Fits Marinized, 4 and 6-cylinder, MerCruiser Engines made by General Motors with Delco Conventional Ignition Systems. See your owner’s manual for replacement information and directions.
    Part Number:
    710-34235Q1
    Availability:
    In Stock - Ships same or next business day.
    Application:
    GM In-line 4 & 6 cyl. & Univ. Atomic 4 w/ Delco single point ignition
    $30.49 $25.99
  • OEM Quicksilver/Mercury Delco Distributor Cap & Rotor Kit  811635Q2

    OEM Quicksilver/Mercury Delco Distributor Cap & Rotor Kit 811635Q2

    Mercury Marine / Quicksilver

    $27.49 $23.99
    OEM Quicksilver/Mercury Distributor Cap & Rotor Kit  811635Q2 This kit includes the distributor cap and rotor. It fits 4-cylinder MerCruiser Engines made by General Motors with Delco EST (electronic spark timing) ignition systems. See your...
    Part Number:
    710-811635Q2
    Availability:
    In Stock - Ships same or next business day.
    Application:
    MerCruiser - OMC - Volvo - Penta GM 4 cyl w/ Delco EST ignition
    $27.49 $23.99
  • OEM Quicksilver/Mercury Thermostat  864493

    OEM Quicksilver/Mercury Thermostat 864493

    Mercury Marine / Quicksilver

    $32.49 $25.06
    OEM Quicksilver/Mercury Thermostat 864493 Thermostat 864493 is for MerCruiser stern drive engines 4.3L, 4.5L, 5.0L, 5.7L and 6.2L MPI (Multi-Port Injection) with dry joint exhaust and closed cooling systems. It is a 170 F degree thermostat.
    Part Number:
    710-864493
    Availability:
    In Stock - Ships same or next business day.
    Temp.:
    170 Deg -
    Application:
    MCM 4.3L - 5.0L - 5.7L & 6.2L MPI engines with dry joint exhaust and closed cooling
    $32.49 $25.06
  • OEM Quicksilver/Mercury Spark Plug Wire Kit  84-816608Q61

    OEM Quicksilver/Mercury Spark Plug Wire Kit 84-816608Q61

    Mercury Marine / Quicksilver

    $99.49 $75.36
    OEM Quicksilver/Mercury Spark Plug Wire Kit  84-816608Q61 Spark plug set 816608Q61 is for use on vintage, V-8 (454-502 CID) General Motors marinized engines with Thunderbolt IV and V ignition systems (1981 through 1997). 
    Part Number:
    710-84-816608Q61
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Red wires - Fits GM V-8 454 - 502 cid engines with Thunderbolt IV & V ignition ('81-'97)
    $99.49 $75.36
  • OEM Quicksilver/Mercury Spark Plug Wires  84-816761Q14

    OEM Quicksilver/Mercury Spark Plug Wires 84-816761Q14

    Mercury Marine / Quicksilver

    $61.49 $49.99
    OEM Quicksilver/Mercury Spark Plug Wires  84-816761Q14 Spark plug set 816761Q14 is for use on 3.0L and LX versions of MerCruiser engines with Delco EST ignition systems (1990 through 2016). 
    Part Number:
    710-84-816761Q14
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Fits MCM 3.0L/LX with Delco EST ignition ('90 & Newer)
    $61.49 $49.99
  • OEM Quicksilver/Mercury Inline Engine Starter  50-8M0090697

    OEM Quicksilver/Mercury Inline Engine Starter 50-8M0090697

    Mercury Marine / Quicksilver

    $363.99 $311.99
    OEM Quicksilver/Mercury Inline Engine Starter 50-8M0090697 Starter motor assembly 8M0090697 can be used on in-line 4-cylinder and 6-cylinder MerCruiser engines made by General Motors (1963 through 1998). This starter motor assembly features an 11-tooth...
    Part Number:
    710-50-8M0090697
    Availability:
    In Stock - Ships same or next business day.
    Type:
    New
    Application:
    In-Line Engines
    $363.99 $311.99
  • OEM Quicksilver/Mercury Spark Plug Wire Set  84-863656A 2

    OEM Quicksilver/Mercury Spark Plug Wire Set 84-863656A 2

    Mercury Marine / Quicksilver

    $154.49 $114.99
    OEM Quicksilver/Mercury Spark Plug Wire Set  84-863656A 2 Spark plug set 863656A2 is for use on 4.3L MPI MerCruiser stern drive engines.
    Part Number:
    710-84-863656A2
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Fits MCM 4.3L MPI
    $154.49 $114.99
  • OEM Quicksilver/Mercury Water Pump Impeller Kit  47-59362A4

    OEM Quicksilver/Mercury Water Pump Impeller Kit 47-59362A4

    Mercury Marine / Quicksilver

    $61.49 $45.92
    OEM Quicksilver/Mercury Water Pump Impeller Kit  47-59362A4 This five-piece kit contains the impeller, face plates and o-ring to replace those parts in MerCruiser Bravo I, II and III drives. 
    Part Number:
    710-47-59362A4
    Availability:
    In Stock - Ships same or next business day.
    Type:
    Impeller Kit
    Application:
    Fits plastic 2 piece body sea water pump
    $61.49 $45.92
  • OEM MerCruiser ExhaustManifold Drain Plug 22-16951Q 1

    OEM MerCruiser ExhaustManifold Drain Plug 22-16951Q 1

    Mercury Marine / Quicksilver

    $31.99 $23.99
    MerCruiser ExhaustManifold Drain Plug 22-16951Q 1 Engine block or manifold drain plug 16951A1 fits most MerCruiser stern drive or inboard engines blocks and manifolds to make draining cooling water for winterizing or changing anti-freeze easier. Can be...
    Part Number:
    710-22-16951Q1
    Availability:
    In Stock - Ships same or next business day.
    Replaces:
    OMC 379957 - Volvo 82745-1
    $31.99 $23.99
  • OEM Quicksilver/Mercury 4.3L Cap & Rotor Kit  898253T28

    OEM Quicksilver/Mercury 4.3L Cap & Rotor Kit 898253T28

    Mercury Marine / Quicksilver

    $137.49 $117.49
    OEM Quicksilver/Mercury 4.3L Cap & Rotor Kit  898253T28 Distributor cap kit 898253T28 fits MerCruiser 4.3L Engines with Multi-Point Electronic Fuel Injection (MPI). See your owner’s manual for replacement information and directions. 
    Part Number:
    710-898253T28
    Availability:
    In Stock - Ships same or next business day.
    Application:
    MCM 4.3L MPI
    $137.49 $117.49
  • OEM Quicksilver/Mercury Thermostat Kit- 140 Degree  807252Q 3

    OEM Quicksilver/Mercury Thermostat Kit- 140 Degree 807252Q 3

    Mercury Marine / Quicksilver

    $34.99 $29.99
    OEM Quicksilver/Mercury Thermostat Kit- 140 Degree  807252Q 3 Thermostat Kit 807252Q3 is for 1982 and older, V-8 MerCruiser marinized stern drive and inboard engines with standard cooling systems made by Ford Motor Company or General Motors. It is...
    Part Number:
    710-807252Q3
    Availability:
    In Stock - Ships same or next business day.
    Description:
    GM & Ford V-8's 1982 & older w/ Std. Cooling/Hi-Performance V-8's 1996 & older & closed cooling: 140 Deg -
    $34.99 $29.99
  • OEM Quicksilver/Mercury Thermostat 130 Degree  8M0057307

    OEM Quicksilver/Mercury Thermostat 130 Degree 8M0057307

    Mercury Marine / Quicksilver

    $129.49 $110.99
    OEM Quicksilver/Mercury Thermostat 130 Degree  8M0057307 Thermostat 8M0057307 is for select Mercury Optimax, 3.0L, non-Pro, V-6 outboards (s/n 1B227000 and above). It is a 130 F degree thermostat. Thermostat only. Additional seals or gaskets may be...
    Part Number:
    710-8M0057307
    Availability:
    In Stock - Ships same or next business day.
    Temp.:
    130 Deg -
    Application:
    3.0L OptiMax
    $129.49 $110.99
  • OEM MerCruiser Switchbox Assembly- 3 & 6 Cylinder 332-7778A12

    OEM MerCruiser Switchbox Assembly- 3 & 6 Cylinder 332-7778A12

    Mercury Marine / Quicksilver

    $400.49 $343.49
    MerCruiser Switchbox Assembly- 3 & 6 Cylinder 332-7778A12 Outboard switch box assembly 7778A12 is for use with three cylinder and six cylinder Mercury or Mariner 2-cycle outboards using ADI (alternator driven ignition) only.
    Part Number:
    710-332-7778A12
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Use on various 3 & 6 cylinder outboards with ADI ignition systems.
    $400.49 $343.49
  • OPEN BOX OEM MerCruiser 4 Cylinder V6 V8 Mag MPI Starter Motor 50-863007A1 (Replaces 50-806964A3 & 50-806964A4)

    OPEN BOX OEM MerCruiser 4 Cylinder V6 V8 Mag MPI Starter Motor 50-863007A1 (Replaces 50-806964A3 & 50-806964A4)

    Mercury Marine / Quicksilver

    $304.49 $229.99
    OPEN BOX  OEM MerCruiser Starter 50-863007A1 (Replaces 50-806964A3 & 50-806964A4) For most late model Chevy GM Marine engines with the 14 inch flywheel Fits most MerCruiser Engines:• 3.0L / 4 Cylinder (1999 and Newer MCM 3...
    Part Number:
    OPENBOX-863007A1
    Availability:
    In Stock - Ships same or next business day.
    $304.49 $229.99
  • OEM Quicksilver/Mercury Spark Plug Wires   84-847701Q17

    OEM Quicksilver/Mercury Spark Plug Wires 84-847701Q17

    Mercury Marine / Quicksilver

    $113.99 $85.74
    OEM Quicksilver/Mercury Spark Plug Wires  84-847701Q17 Spark plug set 847701Q17 is for use on V-8 MerCruiser 454 Magnum MPI Horizon inboard engines (1998).
    Part Number:
    710-84-847701Q17
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Blue wires - Fits MIE 454 Mag MPI Horizon ('98)
    $113.99 $85.74

Engine Parts

PowerBoatSupply.com carries all the premium-quality MerCruiser engine parts you need for a full engine overhaul. The MerCruiser I/O and inboard engines generally last longer than their outboard counterparts, but even with their durability, they eventually require service. Find OEM 3.0L MerCruiser engine parts, including alternators, starter motors, and cool fuel kits. Replacement parts also help restore your engine’s ignition and fuel system, whether diesel or gasoline powered.

Typically, inboard engines last up to 1,500 hours, while outboard engines average about 750 hours. Performing an overhaul—taking apart the engine, identifying and replacing worn parts, and cleaning components before reassembly—can improve power and extend service life. Using quality 454 MerCruiser engine parts during an overhaul helps maximize performance and reliability.

Boat Engine Parts for MerCruiser

We stock all the MerCruiser 3.0 engine parts and accessories you need to service your boat. Our inventory includes replacement serpentine belts, distributor caps, circulating pumps, thermostat kits, gear lube monitor bottles, inline starters, and much more.

MerCruiser Engine Parts Kits

Working with complete kits can be more efficient than ordering individual components. Why place multiple orders when you can get an OEM parts kit with everything you need for a full engine service? For example, an ignition sensor assembly kit includes all the precisely matched components necessary to optimize your ignition system.

For over four decades, PowerBoatSupply.com has supplied boat owners and marine mechanics with top-quality MerCruiser engine parts. Our experienced team is here to help you find the right parts for your specific engine. Buy with confidence—if we wouldn’t use a part in our own boats, we wouldn’t sell it to you.