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MerCruiser 454/502 CID Carbureted & TBI 1983-99

These fresh water cooling systems, manufactured for us by Seakamp and San Juan Engineering, will convert a currently functioningMerCruiser 454/502 CID Carbureted & Throttle Body Fuel Injected models (1983-99) from a raw water cooled application to a fully functional fresh water cooled full system (a full system cools the engine block and exhaust manifold with coolant). The systems come complete with a heat exchanger, thermostat & housing, expansion/surge tank, all gaskets, hoses, bolts, brackets & clamps necessary to convert from raw to fresh water cooling. For general questions about fresh water cooling see our Question & Answer page. To place an order please use our secure online ordering.


MC311 Full FreshWater System	SK 4823 Full FreshWater System	MC335 Full FreshWater System

Fresh Water (Closed) Cooling full systems will circulate anti-freeze through your exhaust manifolds as well as your engine block, protecting both from the harmful effects of raw water corrosion and potential ice damage.

Click Below to Order	Fresh Water Cooling Full Systems
SK 4823	1985-1996 - Front Mounted Fresh Water Full System by Seakamp Engineering, fits 454 CID/7.4L V8 Chevy MerCruiser, Carbureted engines w/ center discharge exhaust, Alpha, Bravo or Straight Inboard drive. Works on engines with v-belts. Cools both engine block and manifolds.
MC334	1983-1998 - Rear Mounted Fresh Water Full System by San Juan Engineering, fits 454 CID V8 Chevy MerCruiser, Carbureted or Throttle Body Fuel Injected engines w/ center discharge exhaust. Works on engines with v-belts. Cools both engine block and manifolds. (Instructions not specific to this kit. Uses MC304 Instructions with Similar Application)
MC311 (shown above) *See Notes below	1990-1999 - Front Mounted Fresh Water Full System by San Juan Engineering, fits 454 CID V8 Chevy MerCruiser, Carbureted or Throttle Body Fuel Injected engines w/ center discharge exhaust, Bravo Drive or straight inboard applications. Works on engines with v-belts. Can be used on Alpha 1 Drives of the same years but you may need to add a seperate raw water pump. Cools both engine block and manifolds.
MC335	Early 1990's V-Drive ONLY - Fresh Water Full System by San Juan Engineering, fits 454 CID V8 Chevy MerCruiser, Carbureted or Throttle Body Fuel Injected engines w/ center discharge exhaust. Works on engines with v-belts. Raw Water Inlet Hose must be routed over Valve Cover.
MC318 *See Notes below	1996-1997 - Front Mounted Fresh Water Full System by San Juan Engineering, fits 454 CID V8 Chevy MerCruiser Magnum EFI Throttle Body Fuel Injected engines w/ center discharge exhaust, *straight inboard only*. Cools both engine block and manifolds.
*Notes for 3" Spacer	If you have a 3" spacer block in between your exhaust manifold and exhaust riser, check the box to the right. There will be an additional charge of $20 per fresh water system added and you will get the appropriate hardware to accommodate them.
*Notes for 6" Spacer	If you have a 6" spacer block in between your exhaust manifold and exhaust riser, check the box to the right. There will be an additional charge of $20 per fresh water system added and you will get the appropriate hardware to accommodate them.