[Half Kit] - MERC SBC 1985-01 Marine Closed Cooling Kit.

Short description:
Mercruiser Closed Cooling [Half Kit] Small Blocks years 1985-2001

New Chevy Small Block (4.3L, 5.0L, 5.7L, 6.2L) Marine Fresh Water Cooling Kit (Fits Mercruiser apps years 1985-2001)

You are looking at a Brand New freshwater cooling kit for Mercruiser applications years 1985-2001. This kit will fit 4.3L, 5.0L, 5.7L and 6.2L marine applications. This is a"half kit" (i.e. this cools only the engine block). On average, this kit will take 1-2 hours for installation. This kit comes with everything needed for installation. Nothing more will be needed. If you are unsure if this will fit your application, please call or email us a serial number off of your application (ex. 0F123456)


Will this kit fit my application? Here are some specs:

  • Will fit Mercruiser applications years 1985-2001
  • Fits small block GM engines (4.3L, 5.0L, 5.7L, 6.2L)
  • Half Kit (cools block only)
  • Designed for applications that have the alternator mounted low and power steering pump mounted high on port side
  • Reference MFH-5398 when calling

Installation Instructions

Please note that the shipping cost listed in this ad is for shipping to the continental USA by FedEx Ground or Home Delivery. If you are located oustide of the USA or in Alaska, Hawaii, or Puerto Rico, pelase contact us for a shipping quote before you buy.


-We Ship Worldwide!-


Detailed Description of Kit

1985-2001 MerCruiser Chevy based small block V8 engines 305-350 CID both sterndrive and inboard, specifically those engines with alternator mounted low and the power steering pump mounted high both on the port side of the engine. Designed especially for the low capacity raw water pumps used on sterndrive engines. Kit will NOT fit most engines with high mounted alternators, such as late model MerCruiser 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 slightly changed. Heat exchanger is 3 3/4 in diameter x 21 3/4" long and fits within overall length, width, and height of most engine conversions. See above illustrations. Plastic expansion tank mounts either on front of heat exchanger or, if space is limited, on vertical surface next to engine.

Block only. Engine block is on fresh water system. Exhaust manifolds remain on raw water system.

A kit includes heat exchanger, heavy-duty translucent plastic expansion tank plus all other components necessary to complete conversion. Some components from the engine are reused. Heat exchanger is primed gray. Brackets and other components are finished in black or zinc plated. All hose clamps are stainless steel.

Shell and tube type heat exchanger with special high capacity design. All copper alloy construction made to the highest industry standards. Dual demountable clean out end covers. Zinc anode protection.

System will maintain engine temperature in the 160-170 F range using the 160 F thermostat, included in kit. System has a capacity safety margin higher than industry standards.

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

Typical average installation time is approximately one hour, 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 are used.

Two year warranty.

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