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Mercruiser Inboard Cooling System

Products: 1 - 50 of 218
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Perko, Flush Pro Marine Engine Flush & Winterizing Kit

Perko, Flush Pro Marine Engine Flush & Winterizing Kit

Mfr. Perko | Mfr No. 0457DP7

The Flush Pro Valve Kit lets you flush and winterize your marine engine without climbing in and out of your boat. With the Flush Pro Kit you use a garden hose from outside your boat...
$139.68
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Jabsco, Engine Cooling, 1-1/4" Water Pump, Bracket Mount, 43210 Series

Jabsco, Engine Cooling, 1-1/4" Water Pump, Bracket Mount, 43210 Series

Mfr. Jabsco Marine | Mfr No. 43210-0001

Jabsco, Engine Cooling, 1-1/4" Water Pump, Bracket Mount, 43210 Series. Flow rate: Nominal 20 US gallons/min (27 Litres/min) at 1500 rpm...
$454.14


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Bi Directional Water Circulation Pump, 18-3599-1

Bi Directional Water Circulation Pump, 18-3599-1

Mfr. Sierra | Mfr No. 18-3599-1

Bi Directional Water Circulation Pump, 18-3599-1. Replaces 60658, 850399, 17437. Fits: GM V-6 & V-8 engines with stamped steel timing covers. Ideal for both standard and counter-rotating engines...
$86.30
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Water Circulating Pump, Bi-Directional - 18-3584

Water Circulating Pump, Bi-Directional - 18-3584

Mfr. Sierra | Mfr No. 18-3584

Water Circulating Pump, Bi-Directional - 18-3584. For use on Crusader Inboard cooling systems. Replacement for Pleasurecraft Inboard #RA057004, Mercruiser and Sterndrive/Cobra and more...
$103.09
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Water Circulating Pump, Bi-Directional - 18-3577-1

Water Circulating Pump, Bi-Directional - 18-3577-1

Mfr. Sierra | Mfr No. 18-3577-1

Water Circulating Pump, Bi-Directional - 18-3577-1, Big block GM engines with stamped steel timing covers, Replacement for Pleasurecraft Inboard #RA057019, Mercruiser Inboard/Outboard...
$129.08
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Water Circulating Pump, Bi-Directional - Mercruiser

Water Circulating Pump, Bi-Directional - Mercruiser

Mfr. Sierra | Mfr No. 18-3599-1

Water Circulating Pump, Bi-Directional - Mercruiser. For use on Mercruiser Inboard/Outboard cooling systems. For late model GM V-6, V-8 engines using a composite timing cover...
$89.00


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Water Circulating Pump, Big Block GM Engines, 18-3574

Water Circulating Pump, Big Block GM Engines, 18-3574

Mfr. Sierra | Mfr No. 18-3574

Water Circulating Pump, Big Block GM Engines, 18-3574.
$135.84


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Mercruiser Water Pump Kit

Mercruiser Water Pump Kit

Mfr. Sierra | Mfr No. 18-3147

Mercruiser Water Pump Kit Replaces: 817275T4. For: Gen II-lower s/n D469859 and up...
$87.47
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Freshwater Block Cooling Kit, Mercruiser 4.3-5.7 L Chevy, V-Belt, '86-'95, SK 4802

Freshwater Block Cooling Kit, Mercruiser 4.3-5.7 L Chevy, V-Belt, '86-'95, SK 4802

Mfr. Seakamp Engineering | Mfr No. SK 4802

Freshwater Cooling Kit SK 4802 provides freshwater engine block cooling system for Chevy Small Block based Mercruiser V6 and V8 4.3 - 5.7 Liter (262-305-350 cid) sterndrives from 1986 thru 1995...
$1,079.77


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Freshwater Block Cooling Kit, Mercruiser 4.3-5.7L, Serpentine Belt, '97-'01, SK 4806

Freshwater Block Cooling Kit, Mercruiser 4.3-5.7L, Serpentine Belt, '97-'01, SK 4806

Mfr. Seakamp Engineering | Mfr No. SK 4806

Freshwater Block Cooling Kit SK 4806 fits Chevy based Mercruiser V6 and V8 4.3 - 5.7 Liter (262-305-350 cid) carbureted engines with serpentine belt built from 1997-2001...
$1,078.57


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Freshwater Block Cooling Kit, Mercruiser 4.3-5.8L, Serpentine Belt, '02-'06, SK 4808

Freshwater Block Cooling Kit, Mercruiser 4.3-5.8L, Serpentine Belt, '02-'06, SK 4808

Mfr. Seakamp Engineering | Mfr No. SK 4808

Freshwater Block Cooling Kit SK 4808 will keep Chevy based Mercruiser V6 and V8 4.3 - 5.8 Liter (262-305-350-357 replacement cid) carbureted engines using a serpentine belt built from 2002-2006...
$1,164.29


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Freshwater Block Cooling Kit, Mercruiser 7.4 L V-Belt, '86-'97. SK 4804

Freshwater Block Cooling Kit, Mercruiser 7.4 L V-Belt, '86-'97. SK 4804

Mfr. Seakamp Engineering | Mfr No. SK 4804

Freshwater Block Cooling Kit SK 4804 fits Chevy Big Block based Mercruiser 7.4 Liter (454 CID) V-8 engines with V-belts produced from 1986 to 1997. This block only freshwater cooling...
$1,157.14


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Freshwater Block Cooling Kit, Mercruiser 3.0L, I4 Engines, SK 4810

Freshwater Block Cooling Kit, Mercruiser 3.0L, I4 Engines, SK 4810

Mfr. Seakamp Engineering | Mfr No. SK 4810

Freshwater, Block Only Cooling Kit for Mercruiser 3.0L (181 cid) inline 4 cylinder engines will keep your boat engine at optimal operating temperature for better performance and longer life...
$971.43


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Freshwater Cooling Kit, 4 Cylinder Off-Engine for Mercuiser & OMC, SK 4004

Freshwater Cooling Kit, 4 Cylinder Off-Engine for Mercuiser & OMC, SK 4004

Mfr. Seakamp Engineering | Mfr No. SK 4004

Off-Engine Freshwater Cooling Kit SK4004 built to keep 2.5 & 3.0L Inline 4 Cylinder Mercuiser & OMC boat engines at optimal operating temperatures for better performance and longer life...
$914.29


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Full Freshwater Cooling Kit, Mercruiser 4.3-5.7 L Chevy Small Block, V-Belt, '86-'95, SK 4821

Full Freshwater Cooling Kit, Mercruiser 4.3-5.7 L Chevy Small Block, V-Belt, '86-'95, SK 4821

Mfr. Seakamp Engineering | Mfr No. SK 4821

Full Freshwater Cooling Kit SK 4821 gives you a full freshwater cooling system for Small Block Chevy based Mercruiser V6 and V8 4.3 5.7L (262-305-350 cid) engines with V-belts built from 1986-1995...
$1,323.36


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Full Freshwater Cooling Kit, Mercruiser 4.3-5.7 L Serpentine Belt, '97-'01, SK 4825

Full Freshwater Cooling Kit, Mercruiser 4.3-5.7 L Serpentine Belt, '97-'01, SK 4825

Mfr. Seakamp Engineering | Mfr No. SK 4825

Full Freshwater Cooling Kit SK 4825 is for Mercruiser Chevy based V6 and V8 4.3 - 5.7 Liter carbureted engines with serpentine belt built from 1997-2001. This full freshwater cooling system...
$1,335.71


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Full Freshwater Cooling Kit, Mercruiser 7.4 L V-Belt Chevy Big Block, '86-'97, SK 4823

Full Freshwater Cooling Kit, Mercruiser 7.4 L V-Belt Chevy Big Block, '86-'97, SK 4823

Mfr. Seakamp Engineering | Mfr No. SK 4823

Full Freshwater Cooling Kit SK 4823 built for Big Block Chevy based Mercruiser 7.4 Liter (454 CID) V-8 engines produced from 1986 thru 1997 with V-belts. This full fresh water cooling system...
$1,418.57


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Mercruiser Oil Cooler

Mercruiser Oil Cooler

Mfr. Seakamp Engineering | Mfr No. 863904T

Mercruiser Oil Cooler...
$225.25


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Thermostat Housing Kit - Mercruiser 861493A3

Thermostat Housing Kit - Mercruiser 861493A3

Mfr. Sierra | Mfr No. 18-1910

Thermostat Housing Kit - Mercruiser 861493A3. Fits: 3.0L GM 1999-Up, S/N 0L340999-Lower
$94.39


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Thermostat Housing Kit - Mercruiser 87290A4

Thermostat Housing Kit - Mercruiser 87290A4

Mfr. Sierra | Mfr No. 18-1989

Replaces: 87290A4, 861006A1
$174.45
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Thermostat Housing, Mercruiser, 18-1994

Thermostat Housing, Mercruiser, 18-1994

Mfr. Sierra | Mfr No. 18-1994

Thermostat Housing, Mercruiser, 18-1994, AP# 5004. Replaces 87290A4...
$131.23


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Thermostat Kit Mercruiser - 18-3651

Thermostat Kit Mercruiser - 18-3651

Mfr. Sierra | Mfr No. 18-3651

Thermostat Kit Mercruiser replacement, 18-3651, for use on Mercruiser Inboard/Outboard cooling systems...
$13.83
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Thermostat Kit Mercruiser - 18-3652

Thermostat Kit Mercruiser - 18-3652

Mfr. Sierra | Mfr No. 18-3652

Thermostat Kit Mercruiser - 18-3652. For use on Mercruiser Inboard/Outboard cooling systems...
$18.07
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Thermostat Kit Mercruiser - 18-3667

Thermostat Kit Mercruiser - 18-3667

Mfr. Sierra | Mfr No. 18-3667

Thermostat Kit Mercruiser - 18-3667. For use on Mercruiser Inboard/Outboard cooling systems...
$16.12
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Thermostat Kit Mercruiser - 18-3668

Thermostat Kit Mercruiser - 18-3668

Mfr. Sierra | Mfr No. 18-3668

Thermostat Kit Mercruiser - 18-3668. For use on Mercruiser Inboard/Outboard cooling systems...
$13.16
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Thermostat Kit - Mercruiser 807252T2, 27-47510, 27-53045-1

Thermostat Kit - Mercruiser 807252T2, 27-47510, 27-53045-1

Mfr. Sierra | Mfr No. 18-3644

Replaces Thermostat 160 Degree F. 807252T2, Cover Gasket 27-47510 & 27-53045-1
$17.93


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Thermostat Kit Mercruiser - 18-3568

Thermostat Kit Mercruiser - 18-3568

Mfr. Sierra | Mfr No. 18-3568

Thermostat Kit Mercruiser - 18-3568. For use on Mercruiser 454, 340HP closed system thermostat kit. Replaces Mercruiser Part # 99155T1...
$14.00
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Thermostat Kit Mercruiser - 18-3650

Thermostat Kit Mercruiser - 18-3650

Mfr. Sierra | Mfr No. 18-3650

Thermostat Kit Mercruiser - 18-3650. For use on Mercruiser Inboard/Outboard cooling systems...
$15.00
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Thermostat Kit, 160 Degree Mercruiser - 18-3648

Thermostat Kit, 160 Degree Mercruiser - 18-3648

Mfr. Sierra | Mfr No. 18-3648

Thermostat Kit, 160 Degree Mercruiser - 18-3648. For use on Mercruiser Inboard/Outboard cooling systems...
$17.76


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Thermostat Kit, Mercruiser, 18-3646

Thermostat Kit, Mercruiser, 18-3646

Mfr. Sierra | Mfr No. 18-3646

Thermostat Kit, Mercruiser, 18-3646, replaces Mercruiser # 807252Q3...
$16.53
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Thermostat Service Kit

Thermostat Service Kit

Mfr. Sierra | Mfr No. 18-1989K

Service Kit for 18-1989 Thermostat Housing
$10.85


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Thermostat, 140 degree, Mercruiser, 18-3550

Thermostat, 140 degree, Mercruiser, 18-3550

Mfr. Sierra | Mfr No. 18-3550

Thermostat, 140 degree, Mercruiser, 18-3550, replacement for Mercruiser Inboard/Outboard #59078...
$15.57
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Thermostat, 160 Degree Mercruiser - 18-3649

Thermostat, 160 Degree Mercruiser - 18-3649

Mfr. Sierra | Mfr No. 18-3649

Replacement Thermostat, 160 Degree Mercruiser - 18-3649...
$17.51


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Thermostat, 160 Degree, Crusader, Mercruiser - 18-3552

Thermostat, 160 Degree, Crusader, Mercruiser - 18-3552

Mfr. Sierra | Mfr No. 18-3552

Thermostat, 160 Degree, Crusader, Mercruiser - 18-3552, 165 - 229 ci, CH190/CH220, 305 ci and CH270, 350 ci and 454 ci...
$11.14
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Thermostat, 160 degree, Mercruiser, 18-3555

Thermostat, 160 degree, Mercruiser, 18-3555

Mfr. Sierra | Mfr No. 18-3555

Thermostat, 160 degree, Mercruiser, 18-3555. Replacement for Mercruiser Inboard/Outboard #99155A1...
$12.68
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Thermostat, Chevrolet, GM, Ford V8's, 142°, 18-3551

Thermostat, Chevrolet, GM, Ford V8's, 142°, 18-3551

Mfr. Sierra | Mfr No. 18-3551

Thermostat, Chrysler, GM, Ford V8's, 142°, 18-3551 for Raw Water cooled engines, Chrysler/Force/US. Marine, Crusader GM models, Pleasurecraft, Ford and Mercruiser Inboard/Outboards...
$9.98
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Thermostat, Mercury / Mariner, 120 F Replaces Mercury #14586

Thermostat, Mercury / Mariner, 120° F Replaces Mercury #14586

Mfr. Sierra | Mfr No. 18-3549

Thermostat, Mercury / Mariner, 120° F. For various Mercury and Mariner outboards. Replaces Mercury #14586...
$16.72
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Thermostat, Volvo, Mercury / Mariner, Johnson / Evinrude, Chrysler / Force / US. Marine, 143, 18-3557

Thermostat, Volvo, Mercury / Mariner, Johnson / Evinrude, Chrysler / Force / US. Marine, 143°, 18-3557

Mfr. Sierra | Mfr No. 18-3557

Thermostat, Mercury / Mariner, Johnson / Evinrude, Chrysler / Force / US. Marine, 143°, 18-3557...
$20.84


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V-8 Thermostat Cover Gasket - Mercruiser - 18-2844

V-8 Thermostat Cover Gasket - Mercruiser - 18-2844

Mfr. Sierra | Mfr No. 18-2844

V-8 Thermostat Cover Gasket - Mercruiser - 18-2844. Replacement for Mercruiser Inboard/Outboard #27-48818-1.
$1.44


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Mercruiser Lower Thermostat Housing, MC-29-87290

Mercruiser Lower Thermostat Housing, MC-29-87290

Mfr. Barr Marine by EDM | Mfr No. MC-29-87290

Mercruiser Lower Thermostat Housing, MC-29-87290, Replaces Mercruiser 87290A4...
$127.02
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Mercruiser Thermostat Housing Cover

Mercruiser Thermostat Housing Cover

Mfr. Barr Marine by EDM | Mfr No. MC-29-47442

Mercruiser Thermostat Housing Cover with off set bolt pattern...
$26.13
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Thermostat Housing, Small Block Chevrolet V6 & V8, CHV-29-80

Thermostat Housing, Small Block Chevrolet V6 & V8, CHV-29-80

Mfr. Barr Marine by EDM | Mfr No. CHV-29-80

Thermostat Housing, Small Block Chevrolet V6 & V8, CHV-29-80 for dual pump cooling system...
$103.79
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Barr, MerCruiser, Upper Thermostat Housing Assembly

Barr, MerCruiser, Upper Thermostat Housing Assembly

Mfr. Barr Marine by EDM | Mfr No. MC-29-47441

Barr, MerCruiser, Upper Thermostat Housing Assembly fits GM Models 225, 260, 228, 898/198...
$26.13
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Mercruiser Thermostat Housing Sleeve, 23-806922

Mercruiser Thermostat Housing Sleeve, 23-806922

Mfr. Quicksilver by Mercury | Mfr No. MERC-23-806922

Mercruiser Thermostat Housing Sleeve, 23-806922...
$9.93
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Thermostat Housing Replaces: 47441A1

Thermostat Housing Replaces: 47441A1

Mfr. Sierra | Mfr No. 18-1977-1

Fits 225, GM 260, 228, 898/198, 185R, 898R, 228R, 2GR
$38.98
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Thermostat Housing - Mercruiser 861188A1

Thermostat Housing - Mercruiser 861188A1

Mfr. Sierra | Mfr No. 18-3531

Thermostat Housing - Mercruiser 861188A1. Lifetime warranty on Sierra Thermostat Housings and other Sierra Engine Parts...
$229.15


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Thermostat Housing - Mercruiser 90736A18

Thermostat Housing - Mercruiser 90736A18

Mfr. Sierra | Mfr No. 18-3678

Thermostat Housing - Mercruiser 90736A18Lifetime warranty on Sierra Thermostat Housings and other Sierra Engine Parts...
Not Currently Available

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Mercruiser - Direct Replacement Heat Exchangers & Oil Coolers

Mercruiser - Direct Replacement Heat Exchangers & Oil Coolers

Mfr. Seakamp Engineering

Mercruiser direct replacement heat exchanger allows use of hot water cabin heater in cooler climates...
$115.78 - $1,231.51

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Water Pump Upper Housing Repair Kit - 817275Q 4

Water Pump Upper Housing Repair Kit - 817275Q 4

Mfr. Quicksilver by Mercury | Mfr No. 817275Q4

Water Pump Upper Housing Repair Kit - 817275Q 4. Fits Alpha One - Gen II...
$123.09
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Water Pump Upper Housing Repair Kit, Mercury / Mariner, Mercruiser, 46-96148A 8

Water Pump Upper Housing Repair Kit, Mercury / Mariner, Mercruiser, 46-96148A 8

Mfr. Quicksilver by Mercury | Mfr No. 96148A8

Water Pump Upper Housing Repair Kit, Mercury / Mariner, Mercruiser, 46-96148A 8. Fits Mercury/Mariner 65 hp (4 cylinder) Through V-6 outboards with short-vane impellers and fits MerCruiser...
$43.62
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Products: 1 - 50 of 218
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Post a question or comment about Mercruiser Inboard Cooling System to our online boating community.
Question
flush kit

i have a 2000 mercruiser 5.7l efi bravo 2 raw water cooled no sea cock what kind of flush kit could i use besides ear muffs Thank you

Submitted by: anthony
Answer

You will need to verify you have a 1-1/4" intake hose( this is pretty standard for Mercruiser) but the best way to flush that system is to use the Perko flush Pro.


Question
Fresh water pump.

I just bought a merc. 4 cyl. inboard-outboard & I wonder if there is a fresh-water pump on the outboard like there is on a outboard engine? If so where is it located? I don’t have a maint. man. as of yet.

Thanks,

Doc.

Submitted by: Doc
Answer

It is called a raw water pump, and it is located in the lower unit similar to an outboard and it is recommended to service it every two years.


Question
heat exchanger

Need a replacement heat exchanger for a MCM 190(3.7) liter 4 cylinder Merc. Installation is in a 1978 Glasply but believe the engine is newer. The one I have leaks and the measurements are 4"x27.5"
Can you supply this item?
Thank you.

Submitted by: Gert Hofman
Answer

Question
Block drain plugs

Do you have a brass substitute for the blue plastic drain plugs on the 2005 4.3 lt. Mercruiser engine? One of mine broke the thumb-wing off leaving the threads in the block in a hard to get to spot. Don`t want this to happen again! Maybe something like an auto rad drain.

Submitted by: Wade
Answer

Unfortunately all we have is the plastic Drain Elbow Assembly just like the original, you may try making one out of plumbing supplies at a hardware store the fitting going into the manifold is standard NPT threads.


Question
engine flushing

I have a 2006 Stingray 250CR 2006 model with a mercruiser 350MPI Bravo 3. I purchased a San Juan engineering freshwater system from you a few yeaqrs ago and it works great - no problems.

My engine has only the engine block fresh water system that does not include the manifolds and risers. My unit uses the stock water intake, water pump and exhaust system.

Now that I am using my boat more frequently in salt water I would like to get a more convenient system for flushing the raw water parts of the system than having to use the "ear muffs" when the boat is on my lift.

Exactly what do you suggest ?

Thanks,

Mike

Submitted by: Mike
Answer

Here is the perfect solution Perko Flush Pro.


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