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MFH-5456 - Water Outlet Assembly
Your Price:
$200.00

MFH-5456 - Water Outlet Assembly

546-C-MFH-5456-5000-3168-1

Water Outlet Assembly, 5000-3168. Component of kit MFH-5456. Qty per kit: 1


MFV-5241 - Anode Kit
Your Price:
$66.99

MFV-5241 - Anode Kit

546-AK-MFV-5241-AK-3-8-1

This service kit contains the following items:

  • 4400-1044 (Zinc Anode, 3/8”NPT, 1-1/4” Long) – Qty 5

Note: Image shown is the complete Fresh Water Cooling System conversion Kit. The image is shown for informational purposes only, and not all parts included in the image are included with this product, and/or not all parts included in this service kit product may not be shown in the image.


MFV-5241 - Expansion Tank
Your Price:
$49.99

MFV-5241 - Expansion Tank

546-C-MFV-5241-5001-1327-1

Expansion Tank, 5001-1327. Component of kit MFV-5241. Qty per kit: 1


MFV-5241 - Heat Exchanger
Your Price:
$1,062.99

MFV-5241 - Heat Exchanger

546-C-MFV-5241-M5241-4146-1

Heat Exchanger, M5241-4146. Component of kit MFV-5241. Qty per kit: 1


MFV-5241 - Service Kit
Your Price:
$75.99

MFV-5241 - Service Kit

546-SK-MFV-5241-SK-MFV-5241-1

This service kit contains the following items:

  • P/N 4500-2005 (Gasket, 4″ end cover) – Qty 2
  • P/N 5000-1150 (Thermostat) – Qty 1
  • P/N 4500-1381 (Gasket, Thermostat Housing) – Qty 1
  • P/N 4500-1622 (Gasket, Rubber Thermostat) – Qty 1
  • P/N 4000-1857 (Cap – 16 Lb Pressure) – Qty 1

Note: Image shown is the complete Fresh Water Cooling System conversion Kit. The image is shown for informational purposes only, and not all parts included in the image are included with this product, and/or not all parts included in this service kit product may not be shown in the image.


MFV-5241 - Thermostat Housing
Your Price:
$26.99

MFV-5241 - Thermostat Housing

546-C-MFV-5241-4000-2004-1

Thermostat Housing, 4000-2004. Component of kit MFV-5241. Qty per kit: 1


MFV-5241 - Thermostat Housing Spacer w/ Bypass
Your Price:
$63.99

MFV-5241 - Thermostat Housing Spacer w/ Bypass

546-C-MFV-5241-4004-2003-1

Thermostat Housing Spacer w/ Bypass, 4004-2003. Component of kit MFV-5241. Qty per kit: 1


MRM-5321-5322 - Adaptor - Intake Cover
Your Price:
$33.99

MRM-5321-5322 - Adaptor - Intake Cover

546-C-MRM-5321-5322-4000-2622-1

Adaptor – Intake Cover, 4000-2622. Component of kit MRM-5321-5322. Qty per kit: 1


MRM-5321-5322 - Bracket - Expansion Bottle, 5000-3054
Your Price:
$57.99

MRM-5321-5322 - Bracket - Expansion Bottle, 5000-3054

546-C-MRM-5321-5322-5000-3054-1

Bracket – Expansion Bottle, 5000-3054. Component of kit MRM-5321-5322. Qty per kit: 1


MRM-5321-5322 - Service Kit
Your Price:
$94.99

MRM-5321-5322 - Service Kit

546-SK-MRM-5321-5322-SK-MRM-5321-5322-1

This service kit contains the following items:

  • P/N 4500-1815 (Gasket, 5″ end cover) – Qty 2
  • P/N 5000-1709 (Thermostat) – Qty 1
  • P/N 4500-1381 (Gasket, Thermostat Housing) – Qty 1
  • P/N 4500-1622 (Gasket, Rubber Thermostat) – Qty 1
  • P/N 4000-1857 (Cap – 16 Lb Pressure) – Qty 1

Note: Image shown is the complete Fresh Water Cooling System conversion Kit. The image is shown for informational purposes only, and not all parts included in the image are included with this product, and/or not all parts included in this service kit product may not be shown in the image.


MRM-5439 - Anode Kit
Your Price:
$66.99

MRM-5439 - Anode Kit

546-AK-MRM-5439-AK-3-8-1

This service kit contains the following items:

  • 4400-1044 (Zinc Anode, 3/8”NPT, 1-1/4” Long) – Qty 5

Note: Image shown is the complete Fresh Water Cooling System conversion Kit. The image is shown for informational purposes only, and not all parts included in the image are included with this product, and/or not all parts included in this service kit product may not be shown in the image.


MRM-5439 - Bracket
Your Price:
$43.99

MRM-5439 - Bracket

546-C-MRM-5439-5000-2873-1

Bracket, 5000-2873. Component of Kit MFH-5439. QTY per kit: 1


MRM-5439 - Expansion Tank
Your Price:
$49.99

MRM-5439 - Expansion Tank

546-C-MRM-5439-5001-1327-1

Expansion Tank, 5001-1327. Component of Kit MFH-5439. QTY per kit: 1


MRM-5439 - Heat Exchanger
Your Price:
$1,063.99

MRM-5439 - Heat Exchanger

546-C-MRM-5439-M5439-4166-1

Heat Exchanger, M5439-4166. Component of Kit MFH-5439. QTY per kit: 1

Note: This product is not currently in stock. Please be aware that this product will require a 2 to 3 week lead time. Orders placed during this time will be fulfilled as soon as the product becomes available.


MRM-5439 - Hold Down Plate
Your Price:
$26.99

MRM-5439 - Hold Down Plate

546-C-MRM-5439-4000-2618-1

Hold Down Plate, 4000-2618. Component of Kit MFH-5439. QTY per kit: 1


MRM-5439 - Rotateable Thermostat Housing
Your Price:
$190.99

MRM-5439 - Rotateable Thermostat Housing

546-C-MRM-5439-5000-3120-1

Rotateable Thermostat Housing, 5000-3120. Component of Kit MFH-5439. QTY per kit: 1


MRM-5439 - Service Kit
Your Price:
$94.99

MRM-5439 - Service Kit

546-SK-MRM-5439-SK-MRM-5439-1

This service kit contains the following items:

  • P/N 4500-2005 (Gasket, 4″ end cover) – Qty 2
  • P/N 5000-3012 (Thermostat) – Qty 1
  • P/N 4500-1622 (Gasket, Rubber Thermostat) – Qty 1
  • P/N 4500-3004 (Grounded T’stat Hous. Gasket) – Qty 1
  • P/N 4000-1857 (Cap – 16 Lb Pressure) – Qty 1

Note: Image shown is the complete Fresh Water Cooling System conversion Kit. The image is shown for informational purposes only, and not all parts included in the image are included with this product, and/or not all parts included in this service kit product may not be shown in the image.


MRM-5439 - Thermostat-Spacer
Your Price:
$68.99

MRM-5439 - Thermostat-Spacer

546-C-MRM-5439-4007-2003-1

Thermostat-Spacer, 4007-2003. Component of Kit MFH-5439. QTY per kit: 1


Off- Engine Chevy 3L Block Only System
Your Price:
$1,795.99

Off- Engine Chevy 3L Block Only System

546-CK-MRM-5345-MRM-5345-1

CONVERSION KIT FITS
This conversion kit fits most Chevy 3.0L 4-Cyl engine conversions made by the major marine engine manufacturers. See space requirements to confirm that it will fit within the engine compartment.

COOLING SYSTEM TYPE
Off-engine remote mounted. Block only. (The engine block protected by freshwater system; the exhaust manifold and exhaust elbow remain on raw water system.)

CONVERSION KIT
Kit includes heat exchanger, heavy-duty translucent plastic expansion tank plus all other components necessary to complete conversion. Some components from engine are reused. Heat Exchanger and Brackets are finished in black. Hose clamps are all stainless steel.

HEAT EXCHANGER
Heat exchanger is shell and tube type with special high capacity design. All copper alloy construction made to the highest industry standards. Includes dual demountable end covers for easy clean out.

SPACE REQUIREMENT
Before purchasing this system, make sure there is enough room in the engine compartment to accommodate the heat exchanger, expansion tank, and necessary components. Heat exchanger is 3.69″ diameter x 17″ overall length. Heat exchanger should be mounted as close to the front of the engine as possible. The mounting bracket is included with the kit. Note: The heat exchanger must be below the level of the filler neck on the thermostat housing. The heat exchanger may be mounted on any horizontal or vertical surface. Expansion tank is mounted close to level with the filler neck. Required space is 4″ x 6″ x 8 1/2″ the opening or closing of the hatch. Do not drill into fuel tanks, water tanks, or any other critical areas. Do not contact any belts or fuel lines.

COOLING SYSTEM CAPACITY
The heat exchanger will maintain coolant temperatures in the 160-170°F range using 160°F thermostat included in kit. The system has a cooling capacity safety margin higher than industry standards.

HEATER SYSTEM HOOKUP
Heaters such as galley water heaters and cabin heaters are not recommended on four-cylinder engines because they may over-cool the engine.

INSTALLATION TIME
Average installation time is approximately two hours, assuming new engine and normal accessibility. Allow additional time for filling and testing. Installation skills are typical of most do-it-yourself boat owners. Complete illustrated installation instructions are included in kit.

WARRANTY
Two year warranty. For complete details see Limited Warranty for Fresh Water Cooling Kits document enclosed with your kit and located on policies page of our website.

PRICE
Trade and volumbe discounts available. Buy through your dealer or direct using Visa, Mastercard, AM Express, UPS COD, or money order.

This conversion kit fits most Chevy 3.0L 4-Cyl engine conversions made by the major marine engine manufacturers. See space requirements to confirm that it will fit within the engine compartment.

COOLING SYSTEM TYPE
Off-engine remote mounted. Block only. (The engine block protected by freshwater system; the exhaust manifold and exhaust elbow remain on raw water system.)

CONVERSION KIT
Kit includes heat exchanger, heavy-duty translucent plastic expansion tank plus all other components necessary to complete conversion. Some components from engine are reused. Heat Exchanger and Brackets are finished in black. Hose clamps are all stainless steel.

HEAT EXCHANGER
Heat exchanger is shell and tube type with special high capacity design. All copper alloy construction made to the highest industry standards. Includes dual demountable end covers for easy clean out.

SPACE REQUIREMENT
Before purchasing this system, make sure there is enough room in the engine compartment to accommodate the heat exchanger, expansion tank, and necessary components. Heat exchanger is 3.69″ diameter x 17″ overall length. Heat exchanger should be mounted as close to the front of the engine as possible. The mounting bracket is included with the kit. Note: The heat exchanger must be below the level of the filler neck on the thermostat housing. The heat exchanger may be mounted on any horizontal or vertical surface. Expansion tank is mounted close to level with the filler neck. Required space is 4″ x 6″ x 8 1/2″. The expansion tank must be mounted as close to the engine as possible. The mounting locations should not hinder the opening or closing of the hatch. Do not drill into fuel tanks, water tanks, or any other critical areas. Do not contact any belts or fuel lines.

COOLING SYSTEM CAPACITY
The heat exchanger will maintain coolant temperatures in the 160-170oF range using 160oF thermostat included in kit. The system has a cooling capacity safety margin higher than industry standards.

HEATER SYSTEM HOOKUP
Heaters such as galley water heaters and cabin heaters are not recommended on four-cylinder engines because they may over-cool the engine.

INSTALLATION TIME
Average installation time is approximately two hours, assuming new engine and normal accessibility. Allow additional time for filling and testing. Installation skills are typical of most do-it-yourself boat owners. Complete illustrated installation instructions are included in kit.

WARRANTY
Two year warranty. For complete details see Limited Warranty for Fresh Water Cooling Kits document enclosed with your kit and located on policies page of our website.

Note: All Monitor Products freshwater cooling kits are primer coated and finish coated in matte black.

General Maintenance and Warranty Information

You can view or download the full PDF document below:

General Manual rev01


On-Engine Block & Manifold Freshwater Cooling Kit for Mercury Remanufacturing 357 Engines
Your Price:
$2,474.99

On-Engine Block & Manifold Freshwater Cooling Kit for Mercury Remanufacturing 357 Engines

546-CK-MFH-5456-MFH-5456-1

This kit is designed to fit 357 Mercury Remanufacturing engines. The system is front mounted at the level of the thermostat housing. This kit is intended for serpentine belt installations. Plastic expansion tank mounts either on front of heat exchanger or if space is limited on vertical surface next to engine.

COOLING SYSTEM TYPE

Full system: Engine block and exhaust manifold on fresh water system. Exhaust elbows remain on raw water system. System utilizes a new, unique, high performance heat exchanger, with built in, full flow, bypass control thermostat ensuring optimal jacket and exhaust manifold water flow under all operating conditions.

CONVERSION KIT

Kit includes heat exchanger, heavy-duty translucent plastic expansion tank plus all other components necessary to complete conversion. Some components from engine are reused. Heat Exchanger and Brackets are finished in black. All hose clamps are stainless steel.

HEAT EXCHANGER

Shell and tube type heat exchanger. Redesigned to achieve a higher cooling capacity. All copper alloy construction made to the highest industry standards. Heavy-duty dual de-mountable clean out end covers. Zinc anode protection.

COOLING SYSTEM CAPACITY

Will maintain engine temperature in the 160-170° F range using 160° F thermostat included in kit. System has cooling capacity safety margin higher than industry standards.

HEATER SYSTEM HOOKUP

Heaters such as galley water heaters and cabin heaters are easily connected to the system by utilizing the cooling system bypass connections.

INSTALLATION TIME

Typical average installation time is approximately three hours, assuming new engine and normal accessibility. Allow additional time for filling and testing. Installation skills are not beyond those of most do-it-yourself boat owners. Complete illustrated installation instructions are included in kit. Ordinary hand tools used.

WARRANTY

Two year warranty. For complete details see Limited Warranty for Fresh Water Cooling Kits document enclosed with your kit and located on policies page of our website.

Note: All Monitor Products freshwater cooling kits are primer coated and finish coated in matte black.

General Maintenance and Warranty Information

You can view or download the full PDF document below:

General Manual rev01


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