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MerCruiser Engine Parts

MerCruiser Engine Parts

  • OEM MerCruiser Thermostat- 120 Degree  14586

    OEM MerCruiser Thermostat- 120 Degree 14586

    Mercury Marine / Quicksilver

    $39.49 $33.49
    MerCruiser Thermostat- 120 Degree 14586 Thermostat 14586 is for Mercury 40 hp through 60 hp 4-stroke outboards (s/n 1C050252 and above). It is a 120 F degree thermostat. Thermostat only. Additional seals or gaskets may be required. See your owner's...
    Part Number:
    710-14586
    Availability:
    In Stock - Ships same or next business day.
    Description:
    120¼
    $39.49 $33.49
  • OEM Quicksilver/Mercury 4.3L Distributor Cap  898253T23

    OEM Quicksilver/Mercury 4.3L Distributor Cap 898253T23

    Mercury Marine / Quicksilver

    $106.99 $78.36
    OEM Quicksilver/Mercury 4.3L Distributor Cap  898253T23 Fits MerCruiser 4.3L Engines with Multi-Point Electronic Fuel Injection (MPI). See your owner’s manual for replacement information and directions.
    Part Number:
    710-898253T23
    Availability:
    In Stock - Ships same or next business day.
    Application:
    MCM 4.3L MPI
    $106.99 $78.36
  • OEM Quicksilver/Mercury Thermostat  75692Q03

    OEM Quicksilver/Mercury Thermostat 75692Q03

    Mercury Marine / Quicksilver

    $29.49 $25.49
    OEM Quicksilver/Mercury Thermostat 75692Q03 Quicksilver thermostat Kit 143 Degrees fits Mercury/Mariner V-6 135 hp, V-6 150 hp A904646>, V-6 175 hp C100861>, and V-6 200 hp 6435503>. Replaces Evinrude and Johnson OMC #434841. Fits 5 - 55 hp...
    Part Number:
    710-75692Q03
    Availability:
    In Stock - Ships same or next business day.
    $29.49 $25.49
  • OEM Quicksilver/Mercury Prestolite Tune Up Kit  392-6324Q 1

    OEM Quicksilver/Mercury Prestolite Tune Up Kit 392-6324Q 1

    Mercury Marine / Quicksilver

    $31.49 $24.34
    MerCruiser Tune Up Kit Prestolite 392-6324Q 1 For 3.0L, 3.7L, 3.8L (V-6) 5.7L and V-8 MerCruiser Engines with Prestolite Conventional Ignition Systems having screw down caps. See your owner’s manual for replacement information and directions. 
    Part Number:
    710-392-6324Q1
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Prestolite 4 cyl - V6 & V8 - ignition (screw-down cap)
    $31.49 $24.34
  • OEM Quicksilver/Mercury 143 3-Cycle/V6 O/B Thermostat  75692

    OEM Quicksilver/Mercury 143 3-Cycle/V6 O/B Thermostat 75692

    Mercury Marine / Quicksilver

    $24.99 $21.49
    OEM Quicksilver/Mercury 143 3-Cycle/V6 O/B Thermostat  75692 Thermostat 75692 is for select 135 hp through 200hp Mercury and Mariner EFI and carburetor fueled 2-cycle, V-6 outboards. It is a 143 F degree thermostat. Thermostat only. Additional seals...
    Part Number:
    710-75692
    Availability:
    In Stock - Ships same or next business day.
    Description:
    Thermostat - 143¼
    $24.99 $21.49
  • OEM Quicksilver/Mercury Spark Plug Wire Kit  84-816608Q78

    OEM Quicksilver/Mercury Spark Plug Wire Kit 84-816608Q78

    Mercury Marine / Quicksilver

    $108.49 $82.99
    OEM Quicksilver/Mercury Spark Plug Wire Kit  84-816608Q78 Spark plug set 816608Q78 is for use on MerCruiser Black Scorpion Tow Sports engines with Delco HEI ignition systems (1997 through 1998).
    Part Number:
    710-84-816608Q78
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Red wires - Fits Black Scorpion Tow Sports w/Delco HEI ignition (1997-1998)
    $108.49 $82.99
  • Special Order! See availability for details
    OEM MerCruiser Water Distribution Housing (Air Actuated - Standard Cooling) 863444T2

    OEM MerCruiser Water Distribution Housing (Air Actuated - Standard Cooling) 863444T2

    Mercury Marine / Quicksilver

    $393.42 $329.95
    OEM MerCruiser Water Distribution Housing (Air Actuated - Closed Cooling) 863444T2 Commonly mis-ordered part! Please confirm fitment of MerCruiser parts with your serial number Photos and descriptions provided via Mercury may not always be...
    Part Number:
    MM-863444T2
    Availability:
    See Special Order Details
    $393.42 $329.95
  • OEM Quicksilver/Mercury Distributor Cap & Rotor Kit- Black Scorpion  805759T05

    OEM Quicksilver/Mercury Distributor Cap & Rotor Kit- Black Scorpion 805759T05

    Mercury Marine / Quicksilver

    $73.99 $54.99
    OEM Quicksilver/Mercury Distributor Cap & Rotor Kit- Black Scorpion 805759T05 Please confirm fitment of MerCruiser parts with your serial numberPhotos and descriptions provided via Mercury may not always be accurateAll of our Mercury parts are sold...
    Part Number:
    710-805759T05
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Black Scorpion Tow Sports (s/n 0M391600 and up) and MX 6.2L Black Scorpion Tow Sports (s/n 0M391750 and up)
    $73.99 $54.99
  • OEM Quicksilver/Mercury Prestolite Distributor Cap 392-9766Q 1

    OEM Quicksilver/Mercury Prestolite Distributor Cap 392-9766Q 1

    Mercury Marine / Quicksilver

    $47.99 $36.18
    MerCruiser Cap-Distrib-Prestolite Ign 392-9766Q 1 Fits Marinized, V-8 MerCruiser Engines made by General Motors with Prestolite conventional ignition systems. See your owner’s manual for replacement information and directions.
    Part Number:
    710-392-9766Q1
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Prestolite V-8 (screw-down cap)
    $47.99 $36.18
  • OEM Quicksilver/Mercury Mallory Tune Up Kit   391-5090Q 1

    OEM Quicksilver/Mercury Mallory Tune Up Kit 391-5090Q 1

    Mercury Marine / Quicksilver

    $48.49 $37.99
    MerCruiser Tune Up Kit Mallory Ign 391-5090Q 1 For marinized V-8 MerCruiser Engines Made by General Motors or Ford with Mallory Conventional Ignition Systems. See your owner’s manual for replacement information and directions.
    Part Number:
    710-391-5090Q1
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Ford/GM V8's w/ Mallory single point ignition (tall cap)
    $48.49 $37.99
  • OEM Quicksilver/Mercury Mallory Distributor Cap  391-5075Q 1

    OEM Quicksilver/Mercury Mallory Distributor Cap 391-5075Q 1

    Mercury Marine / Quicksilver

    $64.49 $48.99
    MerCruiser Cap-Distrib Mallory Ign 391-5075Q 1 Fits Marinized, V-8 MerCruiser Engines made by Ford Motor Company with Mallory Conventional Ignition Systems. See your owner’s manual for replacement information and directions. 
    Part Number:
    710-391-5075Q1
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Mallory V-8 point ignition (tall cap)
    $64.49 $48.99
  • OEM Quicksilver/Mercury Spark Plug Wires  84-816761Q 3

    OEM Quicksilver/Mercury Spark Plug Wires 84-816761Q 3

    Mercury Marine / Quicksilver

    $92.49 $70.14
    OEM Quicksilver/Mercury Spark Plug Wires  84-816761Q 3 Spark plug set 816761Q3 is for use on V-8 MerCruiser (RH) engines (305 and 350 CID)withThunderbolt IV ignition systems (1981 through 1993).
    Part Number:
    710-84-816761Q3
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Fits GM V-8 305 - 350 cid engines (RH) with Thunderbolt IV ignition ('81-'93)
    $92.49 $70.14
  • OEM Quicksilver/Mercury Spark Plug Wires  84-816761Q12

    OEM Quicksilver/Mercury Spark Plug Wires 84-816761Q12

    Mercury Marine / Quicksilver

    $108.49 $79.99
    OEM Quicksilver/Mercury Spark Plug Wires  84-816761Q12 Spark plug set 816761Q12 is for use on V-8 MerCruiser tow Sports inboard engines (5.7L) made by General Motors with conventional points ignition systems (1985 through 1995). 
    Part Number:
    710-84-816761Q12
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Fits MIE 5.7L Tow Sports with conventional point ignition ('85-'95)
    Outboard Marine Corp. P/N: 503752-503755
    $108.49 $79.99
  • Sold Out, please call for ETA.
    OEM Quicksilver/Mercury V8 High-Performance Spark Plug Wires  84-847701Q 7

    OEM Quicksilver/Mercury V8 High-Performance Spark Plug Wires 84-847701Q 7

    Mercury Marine / Quicksilver

    $114.99 $86.22
    OEM Quicksilver/Mercury V8 High-Performance Spark Plug Wires  84-847701Q 7 Spark plug set 847701Q7 is for use on V-8 MerCruiser High Performance engines (454, 502, 540 and 572 CID) with Thunderbolt IV ignition systems (1990 and newer).
    Part Number:
    710-84-847701Q7
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Blue wires - Fits GM Hi-Perf V-8 454/502/540/572 cid engines w/ Thunderbolt IV ignition (1990 & newer)
  • Sold Out, please call for ETA.
    OEM MerCruiser Thermostat Housing Gasket 27-47590Q01

    OEM MerCruiser Thermostat Housing Gasket 27-47590Q01

    Mercury Marine / Quicksilver

    $2.35
    MerCruiser Thermostat Housing Gasket 27-47590Q01 Please confirm fitment of MerCruiser parts with your serial numberPhotos and descriptions provided via Mercury may not always be accurateAll of our Mercury parts are sold and priced
    Part Number:
    710-27-47590Q01
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Renault 90 & GM in-line 4 & 6 cyl. Engines
  • Special Order! See availability for details
    OEM Quicksilver/Mercury Distributor Cap  815407Q02

    OEM Quicksilver/Mercury Distributor Cap 815407Q02

    Mercury Marine / Quicksilver

    $42.99 $31.22
    OEM Quicksilver/Mercury Distributor Cap  815407Q02 This distributor cap kit contains the cap only. It fits marinized, V-6 MerCruiser Engines made by General Motors with Thunderbolt IV and V HEI Ignition Systems. See your owner’s manual for...
    Part Number:
    MM-815407Q02
    Availability:
    See Special Order Details
    Application:
    GM V-6 w/ Thunderbolt IV & V HEI ignitions
    $42.99 $31.22
  • OEM Quicksilver/Mercury Spark Plug Wires  84-816761Q 9

    OEM Quicksilver/Mercury Spark Plug Wires 84-816761Q 9

    Mercury Marine / Quicksilver

    $115.99 $87.24
    OEM Quicksilver/Mercury Spark Plug Wires Kit   84-816761Q 9 Spark plug set 816761Q9 is for use on V-8 MerCruiser engines made by Ford or General Motors with conventional points ignition systems (1963 through 1982) anf Thunderbolt ignition...
    Part Number:
    710-84-816761Q9
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Fits GM & Ford V-8 engines with conventional points ignition ('63-'82) and Thunderbolt ignition ('68-'76)
    $115.99 $87.24
  • OEM Quicksilver Mercury V6 Spark Plug Wire Kit Red 84-816608Q82

    OEM Quicksilver Mercury V6 Spark Plug Wire Kit Red 84-816608Q82

    Mercury Marine / Quicksilver

    $91.49 $69.54
    OEM Quicksilver/Mercury V6 Spark Plug Wires 84-816608Q82 Spark plug set 816608Q82 is for use on V-6 MerCruiser engines (262 CID) made by General Motors with Delco HEI ignition systems (1996 through 2001).
    Part Number:
    710-84-816608Q82
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Red wires - Fits GM V-6 262 cid engines with Delco HEI ignition ('96 & Newer)
    $91.49 $69.54
  • OEM Quicksilver/Mercury Delco Cap & Rotor Kit  850484T 3

    OEM Quicksilver/Mercury Delco Cap & Rotor Kit 850484T 3

    Mercury Marine / Quicksilver

    $57.49 $42.83
    OEM Quicksilver/Mercury Delco Cap & Rotor Kit  850484T 3 This kit includes the distributor cap and rotor. It fits Marinized, V-6 MerCruiser Engines made by General Motors with Delco HEI ignition systems. See your owner’s manual for...
    Part Number:
    710-850484T3
    Availability:
    In Stock - Ships same or next business day.
    Application:
    MerCruiser - Crusader -Volvo Penta GM 4.3L V6 w/ Delco EST ignition
    $57.49 $42.83

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.