Dolphin Marine Service

Old World Craftsmanship with New Technology

205 Pennsylvania Ave.  Fortescue, NJ 08321
856-447-3067

MARINE ENGINE FRESH WATER COOLING SYSTEM CONVERSION KITS
Below you will find information on marine engine fresh water cooling system conversion kits.  These kits are manufactured in the USA by Monitor Products Inc.  Monitor is the OEM of fresh water cooling kits for Mercruiser, Volvo, and many other manufacturers.  We have used, installed, and sold Monitor kits for years and feel they are of excellent quality.

We are happy to provide technical assistance via phone or email if you have questions about your application.
This page was last updated on: November 3, 2008
MONITOR FRESH WATER COOLING KITS

Most Monitor kits are of the block-only type with the engine block on the fresh water side and the exhaust manifolds remaining on the raw water side.  Monitor is eliminating the inexpensive exhaust manifolds from the system in order to create superior cooling and corrosion protection for your costly engine block.  The difference in installed cost between Monitor systems and the much more expensive full systems will more than pay for a set of replacement exhaust manifolds.

In general, the Monitor kits will fit gas engines manufactured from 1983 and on.  In many cases the Monitor kits will fit earlier models with few to no modifications.
FRESH WATER COOLING ADVANTAGES

Monitor Products Fresh Water cooling conversion kits offer the following advantages:
>Protects engine against destructive corrosion by keeping clean anti-freeze in engine block at all times.
>Maintains proper operating temperature for best fuel economy and engine wear.
> Simplified winterization, anti-freeze in engine block permanently.
> New advanced heavy-duty design for maximum cooling performance.
  (will hold engine temperatures at factory-approved levels.)
>Premium all copper alloy heavy-duty construction.
>Pays for itself in resale value of boat.
>Two-year warranty.
>Complete kit from A to Z with no extra parts to buy.
>Easy "do it yourself' in-water installation.
>Easy to follow, detailed illustrated installation instructions.
>Fits within overall height, length, and width of engine.
>System includes special fittings for easy galley water and or cabin heater connections.
CONVERSION KIT FITS
Mercruiser Chevy based V6-V8 engines 262-305-350 CID both sterndrive and inboard.  Especially designed for the low capacity raw water pumps used on sterndrive engines.  Will NOT fit most engines with high mounted alternators and/or V-drives.  Some engines have fuel line routing and fuel filter location that must be changed slightly.  Heat exchanger is 4 1/8" x 23.5" long and fits within overall length, width, and height of most engine conversions.  Heat exchanger extends from extreme starboard side of a normal exhaust manifold towards port side clearing most high mounted power steering pumps if any.  See above illustration.  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.  Block and manifold.  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 painted black.  Brackets and other components painted black or zinc plated.  All hose clamps are stainless.

HEAT EXCHANGER
Shell and tube type.  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.
CONVERSION KIT FITS
Chevy based small block V6/V8 engines 262-305-350 CID both sterndrive and inboard.  Especially designed for the low capacity raw water pumps used on sterndrive engines.  Will NOT fit most engines with high mounted alternators such as late model OMC engines and/or V-drives.  Separate kits are available for those engines.  Some engines have fuel line routing and fuel filter location that must be changed slightly.  Heat exchanger is 4 1/8" x 23.5" long and fits within overall length, width, and height of most engine conversions.  Heat exchanger extends from extreme starboard side of a normal exhaust manifold towards port side clearing most high mounted power steering pumps if any.  Plastic expansion tank mounts either on front of heat exchanger or if space is limited on vertical surface next to engine.

COOLING SYSTEM TYPE
BLOCK ONLY.  Engine block on fresh water system.  Exhaust manifolds 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 painted black.  Brackets and other components painted black or zinc plated.  Hose clamps all stainless.

HEAT EXCHANGER
Shell and tube type.  Special new high capacity design.  All copper alloy construction made to the highest industry standards.  Heavy-duty dual remountable clean out end covers.  Zinc anode protection.
CONVERSION KIT FITS
Late model GM (Chevy) based V6/V8 engines lacking power steering or with power steering pump mounted high on port side of engine.  Typical application on Volvo Penta engine conversions.

SPACE REQUIREMENT
System mounts vertically on front starboard of engine.  Fits within overall height and width of engine.  Extends approximately 3/4" in front of engine.  Expansion tank 9" wide, 9" high, 5" deep mounts separately on vertical surface next to engine. 

COOLING SYSTEM TYPE
BLOCK ONLY.  Engine block on fresh water system.  Exhaust manifolds 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 painted black.  Brackets and other components painted black or zinc plated.  Hose clamps all stainless.

HEAT EXCHANGER
Shell and tube type.  Specially designed for the low cooling water flows, characteristic of sterndrive engines.  All copper alloy construction made to the highest industry standards.  Heavy-duty dual remountable clean out end covers.  Zinc anode protection.
SEE COMPLETE KIT DESCRIPTION BELOW PICTURE
#MFH5241
LIST $550.00
E-MAIL US FOR YOUR COST!
SEE COMPLETE KIT DESCRIPTION BELOW PICTURE
#MFH5229
LIST $550.00
E-MAIL US FOR YOUR COST!
SEE COMPLETE KIT DESCRIPTION BELOW PICTURE
#MFH5230
LIST $690.00
E-MAIL US FOR YOUR COST!
1999 MERCRUISER 5.0 L FROM FACTORY WITH RAW WATER COOLING
(BEFORE)
THE SAME 1999 MERCRUISER 5.0 L OWNER INSTALLED MONITOR BLOCK ONLY FRESH WATER COOLING
(AFTER)