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COOLING SYSTEM COMPONENTS

An inboard engine cooling system works by keeping your boat's engine from overheating. It also ensures that it's operating at its best and at peak efficiency. Because of this, it's important to keep your inboard motor cooling system maintained and updated. After all, it's the lifeblood of your boat's engine. At Discount Inboard Marine, we carry a wide selection of inboard cooling system parts and accessories. You'll find everything from impellers and raw water pumps to gaskets and circulation pumps. Shop Discount Inboard Marine today to keep your inboard engine cooling system running right.

  • SHERWOOD RAW WATER PUMP - BELT DRIVEN SHERWOOD RAW WATER PUMP - BELT DRIVEN

    SHERWOOD RAW WATER PUMP - BELT DRIVEN

    Fits most PCM GM 350, 454 Up To Mid 90's "NOT" Excalibur with belt-driven pump.Uses Item# 0713 impeller. OEM Sherwood G-55-2 pump. Belt-driven raw water pump. Original Equipment by Pleasurecraft Marine. Bin Number (ISBN): 0602
    $975.00
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  • BEARING SHERWOOD R/W PUMP BELT DRIVEN

    BEARING SHERWOOD R/W PUMP BELT DRIVEN

    All Belt Driven PCM Pumps - Not for P105 crank driven pump. Two required per pump for G-21, G-55-2, P1012, P1014 and P1015.   A press is required to change bearings. And, a mechanical seal/seal seat is recommended.   Bin Number...
    $37.75
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  • JOHNSON RAW WATER PUMP CRANK MOUNTED JOHNSON RAW WATER PUMP CRANK MOUNTED

    JOHNSON RAW WATER PUMP CRANK MOUNTED

    Indmar Ford 351 and GM 350 (Not for LT1 or LTR use Item #11205). This is the latest revised version of the Johnson pump and uses the same 812 impeller. Fits Indmar Monsoon, LCR, RTP, Carb 310, Assualt, Predator, TBI, MCX, 6.0L, and Ford Raptor. Includes...
    $245.10
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  • REPAIR KIT, RAW WATER PUMP REPAIR KIT, RAW WATER PUMP

    REPAIR KIT, RAW WATER PUMP

    * REPAIR KIT FOR MERCRUISER ORIGINAL STYLE PLASTIC BODY PUMPS(Click photo for more details). Replace your melted or cracked, plastic pump housing the inexpensive way! Redesigned housing. One piece unit versus two with nipples for in and out. Uses o'ring...
    $101.85
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  • INDMAR RAW WATER PUMP LT1/LTR INDMAR RAW WATER PUMP LT1/LTR

    INDMAR RAW WATER PUMP LT1/LTR

    Different Mounting Flange Than #0603*Mastercraft LT1/LTR Engines*Indmar Part #68-5020, S685020*This pump has the proper extra holes drilled for the LT1/LTR to keep it from shaking excessivley. *Different Mounting Flange Than #0603*Mastercraft LT1/LTR...
    $325.00
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  • G21 SHERWOOD RAW WATER PUMP PCM FORD 351 & 302 G21 SHERWOOD RAW WATER PUMP PCM FORD 351 & 302

    G21 SHERWOOD RAW WATER PUMP PCM FORD 351 & 302

    PCM FORD 302/351, OEM SHERWOOD G-21 PUMP. ALL PCM FORDS MID 70'S AND UP.Sherwood has changed the wear plate and it now sticks out in one spot about 1", no problem on left hand engines but a right hand may have to grind it off. *Tech Tip* This pump can be...
    $858.50
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  • SHERWOOD GM RAW WATER PUMP MAJOR REPAIR KIT

    SHERWOOD GM RAW WATER PUMP MAJOR REPAIR KIT

    This Major repair kit contains everything you need to rebuild your GM (chevy) engines Sherwood seawater - raw water pump. This Sherwood pumps major repair kit for raw water pumps is perfect if you dont want to buy a whole...
    $321.39
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  • T-STAT KIT, 160 MERC EFI

    T-STAT KIT, 160 MERC EFI

    New Style housing used with EFI engines 1994 and up.This housing does not have the removable top cap and is 1 piece cast iron.Mercruiser T-stat # 867252T2. Bin Number (ISBN): 12707  
    $22.98
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  • CIRC PUMP 454

    CIRC PUMP 454

    INCLUDES GASKETS This pump is centrally located on the front of the engine. Its most common problems are bearing or seal failure indicated by noise, pulley wobble, or leaking at the bottom of the pump. Fits most Pleasurecraft and Indmar applications...
    $189.00
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  • T-STAT KIT, 142 MERC CARB

    T-STAT KIT, 142 MERC CARB

    1981 Up Standard Cooling with cast iron housing (Not for EFI engines)5.7L GM IB, Beg #B522506 End #B525981.5.7 GM Ski, Beg #A338553 End #B514626.Mercruiser T-stat # 59137   Make sure to use the Mercruiser style thermostat and not an automotive...
    $45.05
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  • CIRC PUMP SB GM 350, 305, 5.7 CIRC PUMP SB GM 350, 305, 5.7

    CIRC PUMP SB GM 350, 305, 5.7

    Includes gaskets (Not for LT1 Engines) Bi rotational LH or RH GM engines Fit PCM or Indmar, Indmar PT # 55-1045. Bi-Rotational Circulating Pump This pump is centrally located on the front of the engine. Its most common problems are bearing or...
    $137.88
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  • ENGINE CIRCULATING PUMP - FORD ENGINE CIRCULATING PUMP - FORD

    ENGINE CIRCULATING PUMP - FORD

    Includes internal/external gaskets and backing plate, bi-rotational water pump fits 302 AND 351 Ford PCM AND Indmar engines (left OR right hand). Older pumps (1970's) disregard the 2 additional newer style mounting holes (not used)...
    $151.55
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  • THERMOSTAT HSG KIT, NMR GM THERMOSTAT HSG KIT, NMR GM

    THERMOSTAT HSG KIT, NMR GM

    New style GM housing (3 bolt). 1998 and up MPI (exception being some TBI used old triangular style housing thru 2002). Bin Number (ISBN): 30712   CHEVROLET THERMOSTAT HOUSING 531402 1 PIECE NLA.-USE 531067S THERMOSTAT HOUSINGUSE 1/2"...
    $220.99
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