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MerCruiser Engine Parts

MerCruiser Engine Parts

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

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

    Mercury Marine / Quicksilver

    $319.18 $250.99
    NEW 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 3.0L)• 4.3L...
    Part Number:
    710-50-863007A 1
    Availability:
    In Stock - Ships same or next business day.
    $319.18 $250.99
  • OEM MerCruiser Gear Lube Monitor Reservoir Bottle 806193A47 8M0075710

    OEM MerCruiser Gear Lube Monitor Reservoir Bottle 806193A47 8M0075710

    Mercury Marine / Quicksilver

    $50.00 $35.70
    OEM MerCruiser Gear Lube Monitor Reservoir Bottle 806193A47 8M0075710 Gear lube bottle 8M0075710 is for use with MerCruiser Alpha and Bravo stern drives with standard cooling (model year 2002 and newer). Easy to install with common shop tools...
    Part Number:
    710-8M0075710
    Availability:
    In Stock - Ships same or next business day.
    $50.00 $35.70
  • OEM MerCruiser Water Distribution Housing (3 & 7 Point Drain - Standard Cooling) 863631a1 863631t1

    OEM MerCruiser Water Distribution Housing (3 & 7 Point Drain - Standard Cooling) 863631a1 863631t1

    Mercury Marine / Quicksilver

    $311.58 $218.73
    OEM MerCruiser Water Distribution Housing (3 & 7 Point Drain - Standard Cooling) 863631t1 This is a commonly mis-ordered part! Please confirm fitment of MerCruiser parts with your serial numberPhotos and descriptions provided via Mercury may not...
    Part Number:
    710-863631T 1
    Availability:
    In Stock - Ships same or next business day.
    $311.58 $218.73
  • OEM Quicksilver/Mercury Small Block 5.0 5.7 6.2 350 377  Circulating Pump  46-8M0113734

    OEM Quicksilver/Mercury Small Block 5.0 5.7 6.2 350 377 Circulating Pump 46-8M0113734

    Mercury Marine / Quicksilver

    $166.58 $142.99
    OEM Quicksilver/Mercury Small Block Circulating Pump 46-8M0113734 Replacement water pump with housing 8M0113734 is for V-6 (serial number 1A603239 and below) and V-8 (305, 350 and 377 cid) MerCruiser engines made by General Motors. See your owner's...
    Part Number:
    710-46-8M0113734
    Availability:
    In Stock - Ships same or next business day.
    Application:
    GM V-6(s/n 1A063239 & below) & V-8 (350 & 377 cid) engines
    $166.58 $142.99
  • OEM MerCruiser Water Distribution Housing (Single Point/Rod Actuated - standard cooling)  863444T1

    OEM MerCruiser Water Distribution Housing (Single Point/Rod Actuated - standard cooling) 863444T1

    Mercury Marine / Quicksilver

    $294.83 $206.97
    OEM MerCruiser Water Distribution Housing (Single Point/Rod Actuated - standard cooling) 863444T1 This is a commonly mis-ordered part!   Please confirm fitment of MerCruiser parts with your serial numberPhotos and descriptions provided via...
    Part Number:
    710-863444T 1
    Availability:
    In Stock - Ships same or next business day.
    $294.83 $206.97
  • OEM MerCruiser 4.3/5.0/5.7 V6/V8 Brass Sea Water Pump  862914T3 862914T10 8M0118067 8M0137216 8M0122655 8M0139995

    OEM MerCruiser 4.3/5.0/5.7 V6/V8 Brass Sea Water Pump 862914T3 862914T10 8M0118067 8M0137216 8M0122655 8M0139995

    Mercury Marine / Quicksilver

    $601.42 $533.46
    NEW OEM Factory MerCruiser  BRASS sea water pump assy WITHOUT Air Fittings (AKA Raw Water Pump/ Seawater pump) Casting number on this pump housing is 8629140 and the casting number on the back nipple plate is 862776c and is removable if yours...
    Part Number:
    710-46-8M0139995
    Availability:
    In Stock - Ships same or next business day.
    $601.42 $533.46
  • OEM MerCruiser Thermostat Housing Gasket 27-530451

    OEM MerCruiser Thermostat Housing Gasket 27-530451

    Mercury Marine / Quicksilver

    $5.50 $3.44
    MerCruiser Thermostat Housing Gasket 27-530451 Thermostat Housing Gasket 530451 is for use on V-6 and V-8 MerCruiser stern drive and inboard engines made by General Motors. It can also be used on Outboard Marine Corporation and Volvo Penta North America...
    Part Number:
    710-27-53045 1
    Availability:
    In Stock - Ships same or next business day.
    Description:
    T-Stat housing gasket w/grounding tabs Repl OEM No. Marine Pwr# 0505-027 MC# 3852111 Volvo# 3852111-8
    $5.50 $3.44
  • OEM MerCruiser Alpha Bravo V6/V8 Serpentine Belt 57-865615-003 57-865615Q03

    OEM MerCruiser Alpha Bravo V6/V8 Serpentine Belt 57-865615-003 57-865615Q03

    Mercury Marine / Quicksilver

    $157.58 $134.99
    OEM MerCruiser Alpha Bravo V6/V8 Serpentine Belt 57-865615-003 57-865615Q03 Serpentine belt 865615Q03 is 2, 704mm long to fit MerCruiser 2001-2016 V-6 & V-8 (305 & 350 cid) Alpha engines with closed cooling and Bravo engines with standard cooling...
    Part Number:
    710-57-865615Q03
    Availability:
    In Stock - Ships same or next business day.
    $157.58 $134.99
  • OEM Mercruiser Quicksilver V8 MPI Spark Plug Ignition Wires Set for flat cap  84-863656A1

    OEM Mercruiser Quicksilver V8 MPI Spark Plug Ignition Wires Set for flat cap 84-863656A1

    Mercury Marine / Quicksilver

    $154.75 $132.49
    OEM Quicksilver/Mercury 555 Spark Plug Wires  84-863656A 1 Spark plug set 863656A1 is for use on V-8 MerCruiser stern drive and inboard engines (5.0L, 5.7L and 6.2L MPI) with ECM 555 (serial number 0M300000 through 2A455878). 
    Part Number:
    710-84-863656A 1
    Availability:
    In Stock - Ships same or next business day.
    Application:
    Fits MCM/MIE 5.0L - 5.7L & 6.2L MPI engines ('01 & Newer) with ECM 555 (s/n0M300000 and up)
    $154.75 $132.49
  • OEM MerCruiser GM V6 & V8 Thunderbolt IV & V Ignition Coil 300-8M0079202

    OEM MerCruiser GM V6 & V8 Thunderbolt IV & V Ignition Coil 300-8M0079202

    Mercury Marine / Quicksilver

    $122.33 $104.99
    OEM MerCruiser GM V6 & V8 Thunderbolt IV & V Ignition Coil Part number:300-8M0079202 (This part supersedes part numbers:392-805570A2,392-7803A4,392-7803) Genuine Mercury Marine Part for MerCruiser Inboard engines Fully watertight composite body...
    Part Number:
    710-300-8M0079202
    Availability:
    In Stock - Ships same or next business day.
    Fits:
    GM V-6 & V-8 engines w/Thunderbolt IV & V ignition
    $122.33 $104.99
  • OEM Quicksilver/Mercury ECM 55 Cap/Rotor Kit   8M0061335

    OEM Quicksilver/Mercury ECM 55 Cap/Rotor Kit 8M0061335

    Mercury Marine / Quicksilver

    $131.33 $112.49
    OEM Quicksilver/Mercury ECM 55 Cap/Rotor Kit  8M0061335 Distributor Cap Kit 8M0061335 is for use on 5.0L, 5.7L and 6.2 Multi-Port Injection (MPI) MerCruiser Stern Drive and Inboard engines with ECM 555 (2001 through 2015) (serial number 0M300000...
    Part Number:
    710-8M0061335
    Availability:
    In Stock - Ships same or next business day.
    Application:
    MerCruiser V-8 MPI Delco HEI (555 ECM) - 2001 & newer MCM/MIE 5.0L - 5.7 - 6.2L MPI engines w/ ECM 555 (s/n 0M300000 & up)
    $131.33 $112.49
  • OEM Quicksilver/Mercury Thermostat-160 Degree  8M0109441

    OEM Quicksilver/Mercury Thermostat-160 Degree 8M0109441

    Mercury Marine / Quicksilver

    $33.00 $28.49
    Thermostat 8M0109441: Is for MerCruiser engines made by General Motors with standard cooling systems requiring the use of the 160 degree (F) thermostat. Easy to replace with common tools. See your owner's manual for removal of non-functioning...
    Part Number:
    710-8M0109441
    Availability:
    In Stock - Ships same or next business day.
    Temp.:
    160 Deg -
    Application:
    1987 & newer GM engines w/standard cooling requiring 160 Deg - thermostat
    $33.00 $28.49
  • OEM Quicksilver/Mercury Thunderbolt Distributor Cap & Rotor Kit  805759Q 3

    OEM Quicksilver/Mercury Thunderbolt Distributor Cap & Rotor Kit 805759Q 3

    Mercury Marine / Quicksilver

    $58.58 $49.99
    OEM Quicksilver/Mercury Thunderbolt Distributor Cap & Rotor Kit  805759Q 3 This distributor cap kit contains the cap, rotor and cap gasket. Fits Marinized, V-8 MerCruiser Engines made by General Motors with Thunderbolt IV and V HEI Ignition...
    Part Number:
    710-805759Q 3
    Availability:
    In Stock - Ships same or next business day.
    Application:
    MerCruiser GM V-8 w/ Thunderbolt HEI ignition
    $58.58 $49.99
  • OEM MerCruiser 8.1/496 Mag/HO Serpentine Belt 865615001 57-865615Q01

    OEM MerCruiser 8.1/496 Mag/HO Serpentine Belt 865615001 57-865615Q01

    Mercury Marine / Quicksilver

    $98.25 $69.56
    OEM MerCruiser 8.1/496 Mag/HO Serpentine Belt 865615001 57-865615Q01 Replaces:• OEM: 57-8638761, 57-8623523, 57-865615001, 57-865615Q01• Sierra: 18-15119 Engines Models May Include:496 Mag & HO Please be sure to match up the OEM part number...
    Part Number:
    710-57-865615Q01
    Availability:
    In Stock - Ships same or next business day.
    $98.25 $69.56
  • OEM Quicksilver/Mercury Thermostat Kit- 160 Degree  807252Q 5

    OEM Quicksilver/Mercury Thermostat Kit- 160 Degree 807252Q 5

    Mercury Marine / Quicksilver

    $44.92 $38.49
    OEM Quicksilver/Mercury Thermostat Kit- 160 Degree  807252Q 5 Thermostat 807252Q5 is for V-6 and V-8 MerCruiser engines (except high performance engines) made by General Motors (model year 1987 through 2016) with standard cooling requiring a 160...
    Part Number:
    710-807252Q 5
    Availability:
    In Stock - Ships same or next business day.
    Description:
    GM engines '87 & later w/ Std. Cooling requiring a 160 Deg - thermostat
    $44.92 $38.49
  • OEM MerCruiser Sea Water Pump Assembly -With Serpentine Pulley 46-807151A9

    OEM MerCruiser Sea Water Pump Assembly -With Serpentine Pulley 46-807151A9

    Mercury Marine / Quicksilver

    $570.79
    Replacement sea water pump housing 807151A9 is plastic to combat corrosion in saltwater installations. It is for V-6 and V-8 MerCruiser engines made by General Motors with a serpentine belt pulley system for engine accessories and electrical fuel pumps...
    Part Number:
    710-46-807151A 9
    Availability:
    In Stock - Ships same or next business day.
    $570.79
  • OEM MerCruiser Gear Lube Monitor Reservoir Bottle 806193A46 8M0075709

    OEM MerCruiser Gear Lube Monitor Reservoir Bottle 806193A46 8M0075709

    Mercury Marine / Quicksilver

    $67.25 $48.02
    OEM Quicksilver/Mercury Oil Bottle Assembly  8M0075709 Nipple face Right When looking at grooved side of bottle.   Item Supersession Chain:   RowClassPart NumberSS LevelDispDescription 1   8M0075709 00 ACT BOTTLE ASSY-OIL 2...
    Part Number:
    710-8M0075709
    Availability:
    In Stock - Ships same or next business day.
    $67.25 $48.02
  • OEM Quicksilver/Mercury Big Block 454 502 7.4 Circulating Pump  46-8M0113735

    OEM Quicksilver/Mercury Big Block 454 502 7.4 Circulating Pump 46-8M0113735

    Mercury Marine / Quicksilver

    $266.58 $228.49
    OEM Quicksilver/Mercury Big Block Circulating Pump  46-8M0113735 Replacement bi-directional water pump with housing 8M0113735 is for V-8 (454 and 502 cid) MerCruiser engines made by General Motors. See your owner's manual or service manual for...
    Part Number:
    710-46-8M0113735
    Availability:
    In Stock - Ships same or next business day.
    Application:
    GM V-8 (454 & 502 cid) engines
    $266.58 $228.49

Engine Parts

PowerBoatSupply.com has all the premium-quality Mercruiser engine parts you need for an overhaul of your boat’s engine. The Mercruiser I/O and inboard engine generally last longer than its outboard cousin. But even with a longer lifespan, these engines will eventually need an overhaul. Find OEM 3.01 Mercruiser engine parts, including alternators, starter motors, and cool fuel kits. Use replacement parts to improve your engine's ignition and fuel system, whether it's diesel or gasoline.

You can get 1500 hours with an inboard engine and about 750 hours with outboard engines. However, taking apart the engine, identifying and replacing damaged parts, and cleaning all components before restoring it can improve power and longevity. Use quality 454 Mercruiser engine parts during an overhaul to increase the performance and lifespan of your boat.

Boat engine parts Mercruiser

We have all the Mercruiser 3.0 engine parts and accessories you need to service your engine, including replacement serpentine belts, distributor caps, circulating pumps, thermostat kits, gear lube monitor bottles, inline engine starters – and so much more!

Mercruiser engine parts kits

It is usually more efficient to work with complete kits when overhauling your Mercruiser engine. Why place multiple orders for individual parts when you can get the complete package of OEM replacement parts to refurbish your engine and get it running in peak condition? For example, an ignition sensor assembly kit contains all components that precisely fit together to improve your ignition system.

PowerBoatSupply.com has provided boat owners and marine mechanics with premium engine parts for over four decades. Our team is ready to use our knowledge and experience to help you find the right Mercruiser parts for your engine. Just ask if you have any questions about which is the right part to order. Buy with peace of mind knowing that we wouldn’t sell you a part that we weren’t confident in using in our own boats.