MerCruiser Engine Parts
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OEM Quicksilver/Mercury O/B Thermostat Kit 75692Q2
Mercury Marine / Quicksilver
$55.99 $47.99OEM Quicksilver/Mercury O/B Thermostat Kit 75692Q2 Thermostat 75692Q2 is for 135 hp through 15 hp V-6 Mercury and Mariner outboards with serial number A9046446 and higher; 175 hp Mercury and Mariner V-6 outboards with serial numbers C100861 and...- Part Number:
- 710-75692Q2
- Availability:
- In Stock - Ships same or next business day.
- Description:
- Kit incl. 2 ea.: Thermostat & Gasket V-6 135-150hp S/N A904646 & later - V-6 175hp S/N C100861 & later - V-6 200hp S/N 6435503 & later
$55.99 $47.99 -
OEM Quicksilver/Mercury Thermostat Kit- 160 99155T 1
Mercury Marine / Quicksilver
$40.49 $30.66OEM Quicksilver/Mercury Thermostat Kit- 160 99155T 1 Thermostat 991551T1 is L98for 1998 and newer MerCruiser marinized V-6 and V-8 engines made by General Motors using closed cooling systems and requiring the use of the 160 F degree thermostat. It is a...- Part Number:
- 710-99155T1
- Availability:
- In Stock - Ships same or next business day.
- Description:
- GM V-6/V-8 1998 & later w/ closed cooling
$40.49 $30.66 -
OEM Quicksilver/Mercury Delco Distributor Cap 393-9459Q1
Mercury Marine / Quicksilver
$30.49 $26.49MerCruiser Cap-Distributor-Delco Ign 393-9459Q1 Fits Marinized, 4-cylinder MerCruiser Engines made by General Motors with conventional ignition systems.- Part Number:
- 710-393-9459Q1
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Delco 4 cyl. pt ignition
$30.49 $26.49 -
OEM Quicksilver/Mercury Thermostat- 160 99155 1
Mercury Marine / Quicksilver
$39.99 $30.07OEM Quicksilver/Mercury Thermostat- 160 99155 1 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 EACH- Part Number:
- 710-991551
- Availability:
- In Stock - Ships same or next business day.
- Temp.:
- 160 Deg -
- Application:
- 1998 and newer GM V-6 & V-8 engines with closed cooling
$39.99 $30.07 -
OEM MerCruiser Thermostat Housing Gasket 27-33179Q02
Mercury Marine / Quicksilver
$4.89 $4.49OEM MerCruiser Thermostat Housing Gasket 27-33179Q02 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 EACH- Part Number:
- 710-27-33179Q02
- Availability:
- In Stock - Ships same or next business day.
- Application:
- MCM/MIE GM 4 cyl. - V-6 & V-8 engines - for thermostat housing with flat cover plate
$4.89 $4.49 -
OEM Quicksilver/Mercury Delco Spark Plug Wires 84-816608Q70
Mercury Marine / Quicksilver
$107.99 $79.99OEM Quicksilver/Mercury Delco Spark Plug Wires 84-816608Q70 Spark plug set 816608Q70 is for use on V-8 (305 and 350 CID) General Motors marinized engines with Delco HEI ignition systems (1995 through 1998).- Part Number:
- 710-84-816608Q70
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Red wires - Fits GM V-8 305 - 350 cid engines with Delco HEI ignition ('95-'98)
$107.99 $79.99 -
OEM Quicksilver/Mercury Fuel Pump & Cooler Kit 861156A1 861156A04 8M0125845 (S/N 0K999999 AND LOWER)
Mercury Marine / Quicksilver
$914.99 $769.99OEM MerCruiser Fuel Pump & Cooler Kit 8M0125845 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 EACH- Part Number:
- 710-8M0125845
- Availability:
- In Stock - Ships same or next business day.
$914.99 $769.99 -
OEM Quicksilver/Mercury Thermostat Kit- 140 Degree 59078Q 3
Mercury Marine / Quicksilver
$36.49 $31.49OEM Quicksilver/Mercury Thermostat Kit- 140 Degree 59078Q 3 Thermostat 59078Q3 kit is for use in older MerCruiser in-line 4-cylinder and 6-cylinder engines made by General Motors. The two-piece kit includes the thermostat and cork gasket.- Part Number:
- 710-59078Q3
- Availability:
- In Stock - Ships same or next business day.
- Description:
- GM In-line 4 & 6 cylinder: 140 Deg -
$36.49 $31.49 -
Sold Out, please call for ETA.
OEM Quicksilver/Mercury 350 Mag Spark Plug Wires 84-847701Q24
Mercury Marine / Quicksilver
$113.49 $85.20OEM Quicksilver/Mercury 350 Mag Spark Plug Wires 84-847701Q24 Spark plug set 847701Q24 is for use on V-8 MerCruiser 350 Magnum, Horizon inboard engines (1999 through 2007).- Part Number:
- 710-84-847701Q24
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Blue wires - Fits MIE 350 Mag Horizon ('99 & Newer)
$113.49 $85.20 -
OEM Quicksilver/Mercury Spark Plug Wires With Points 84-816761Q 5
Mercury Marine / Quicksilver
$60.99 $49.99OEM Quicksilver/Mercury Spark Plug Wires With Points 84-816761Q 5 Spark plug set 816761Q5 is for use on 4-cylinder MerCruiser engines with conventional points ignition systems (1963 through 1995).- Part Number:
- 710-84-816761Q5
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Fits GM 4 cyl. engines with conventional points ignition ('63-'95)
Outboard Marine Corp. P/N: 503748
$60.99 $49.99 -
OEM MerCruiser V8 Sea Water Pump Assembly V-Belt 46-72774A32
Mercury Marine / Quicksilver
$718.93 $609.16OEM MerCruiser V8 Sea Water Pump Assembly V-Belt 46-72774A32 (AKA Raw Water Pump/Seawater pump) • Pulley not included • Fits most V8 MerCruiser engines from 1985-1995 Replacement water pump housing 72774A32 is brass to combat...- Part Number:
- 710-46-72774A32
- Availability:
- In Stock - Ships same or next business day.
$718.93 $609.16 -
OEM Quicksilver/Mercury Spark Plug Wires 84-816761Q4
Mercury Marine / Quicksilver
$91.49 $69.99OEM Quicksilver/Mercury Spark Plug Wires 84-816761Q4 Spark plug set 816761Q4 is for use on V-8 MerCruiser (LH) engines (305 and 350 CID) with Thunderbolt IV ignition systems (1981 through 1992).- Part Number:
- 710-84-816761Q4
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Fits GM V-8 305 - 350 cid engines (LH) with Thunderbolt IV ignition ('81-'95)
$91.49 $69.99 -
OEM Quicksilver/Mercury V-Belt 65A Delco Alternator 862030T01
Mercury Marine / Quicksilver
$387.99 $289.99OEM Quicksilver/Mercury V-Belt 65A Delco Alternator 862030T01 65 amp alternator 862030T01 is for 3.0L MerCruiser stern drive or inboard engines (serial number 0M326296 through 2A506300) See your service manual for replacement directions. Easy to...- Part Number:
- 710-862030T01
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Delco 65A: V-Belt - MCM 3.0L (s/n 0M326293 and up)
- Type:
- New
$387.99 $289.99 -
Sold Out, please call for ETA.
OEM MerCruiser Gear Lube Monitor Reservoir Bottle W/Bracket & Install Kit 806193A49
Mercury Marine / Quicksilver
$269.92 $196.29OEM MerCruiser Gear Lube Monitor Reservoir Bottle W/Bracket & Install Kit 806193A49 Includes bottle and everything needed for installation. Item Supersession Chain: RowClassPart NumberSS LevelDispDescription 1 806193A49...- Part Number:
- 710-806193A49
- Availability:
- In Stock - Ships same or next business day.
$269.92 $196.29 -
OEM Quicksilver/Mercury Delco Distributor Cap 811635T3
Mercury Marine / Quicksilver
$19.69 $13.99OEM Quicksilver/Mercury Delco Distributor Cap 811635T3 This item is the distributor cap only. It fits 4-cylinder MerCruiser Engines made by General Motors with Delco EST (electronic spark timing) ignition systems. See your owner’s manual for...- Part Number:
- 710-811635T3
- Availability:
- In Stock - Ships same or next business day.
- Application:
- GM 4 cyl. w/ Delco EST ignition
$19.69 $13.99 -
OEM Quicksilver/Mercury Spark Plug Wires 84-847701Q25
Mercury Marine / Quicksilver
$116.99 $87.99OEM Quicksilver/Mercury Spark Plug Wires 84-847701Q25 Spark plug set 847701Q25 is for use on V-8 MerCruiser 500 EFI engines (1998 through 2004) and MerCruiser 575 SCi engines (2000 through 2005).- Part Number:
- 710-84-847701Q25
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Blue wires - Fits MCM 500 EFI ('98 & Newer) & 575 SCi ('00 & Newer)
$116.99 $87.99 -
OEM Quicksilver/Mercury Thermostat- 140 Degree 59078
Mercury Marine / Quicksilver
$37.99 $28.74OEM Quicksilver/Mercury Thermostat- 140 Mercury 59078 Thermostat 59078 is for use in MerCruiser 120/2.5L engines (with s/n 2324347 and higher) with cast iron exhaust manifolds. Also for use in MerCruiser 140/3.0L engines (with s/n 0L340999 and below) and...- Part Number:
- 710-59078
- Availability:
- In Stock - Ships same or next business day.
- Temp.:
- 140 Deg -
- Application:
- MCM GM in-line 4 & 6 cyl. engines
$37.99 $28.74 -
Sold Out, please call for ETA.
OEM Quicksilver/Mercury Spark Plug Wires 84-816608Q71
Mercury Marine / Quicksilver
$107.99 $84.99OEM Quicksilver/Mercury Spark Plug Wires 84-816608Q71 Spark plug set 816608Q71 is for use on V-8 350 CID General Motors marinized engines with Delco HEI ignition systems (1995 through 1998).- Part Number:
- 710-84-816608Q71
- Availability:
- In Stock - Ships same or next business day.
- Application:
- Red wires - Fits GM V-8 350 cid engines with Delco HEI ignition ('95-'98)
$107.99 $84.99 -
OEM MerCruiser 4.3/5.0/5.7 Serpentine Belt 862089A1 865615008 57-865615Q08
Mercury Marine / Quicksilver
$116.49 $85.14OEM MerCruiser 4.3/5.0/5.7 Serpentine Belt 862089A1 865615008 57-865615Q08 Replaces: 57-8638768, 57-862089, 57-862089A1, 57-865615008, 57-865615Q08 Engines Models May Include:2000+ 4.3,5.0,5.7,6.2 (0L619000+) No Power Steeringing, Closed Cooling, High...- Part Number:
- 710-57-865615Q08
- Availability:
- In Stock - Ships same or next business day.
$116.49 $85.14 -
OEM Quicksilver/Mercury O/B Thermostat- 143 Degree 833072003
Mercury Marine / Quicksilver
$50.49 $42.99OEM Quicksilver/Mercury O/B Thermostat- 143 Degree 833072003 Thermostat 833072003 is for select Mercury Optimax, 2.5L, non-Pro, V-6 outboards (s/n 1B227000 and above). It is a 143 F degree thermostat. Thermostat only. Additional seals or gaskets...- Part Number:
- 710-833072003
- Availability:
- In Stock - Ships same or next business day.
- Temp.:
- 143 Deg -
- Application:
- Optimax Mercury O/B with 2.5L - 135-200 hp
$50.49 $42.99
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.