Cooling system

  • RIVA PROP NUT COMP. Ø 20-30 3/4” W Zinc

    RIVA PROP NUT COMP. Ø 20-30 3/4” W Zinc

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  • RIVA PROP NUT COMP. 18x2,0 Zinc

    RIVA PROP NUT COMP. 18×2,0 Zinc

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  • RIVA PROP NUT COMP. Ø 20-30 18x2 Zinc

    RIVA PROP NUT COMP. Ø 20-30 18×2 Zinc

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  • RIVA PROP NUTCOMP. 18x1,75 Zinc

    RIVA PROP NUTCOMP. 18×1,75 Zinc

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  • RIVA PROP NUT COMP. Ø 20-30 18x1,75 Acquarama Zinc

    RIVA PROP NUT COMP. Ø 20-30 18×1,75 Acquarama Zinc

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  • MTF PROP NUT COMP. Ø20-30 18x1,5 Zinc

    MTF PROP NUT COMP. Ø20-30 18×1,5 Zinc

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  • RIVA PROP NUT COMP. 18x1,5 Zinc

    RIVA PROP NUT COMP. 18×1,5 Zinc

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  • RIVA PROP NUT COMP. Ø 20-30 18x1,5 Zinc

    RIVA PROP NUT COMP. Ø 20-30 18×1,5 Zinc

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  • MTF PROP NUT COMP. Ø20-30 16x1,5 Zinc

    MTF PROP NUT COMP. Ø20-30 16×1,5 Zinc

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  • RIVA PROP NUT COMP. 16x1,5 Zinc

    RIVA PROP NUT COMP. 16×1,5 Zinc

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  • RIVA PROP NUT COMP. Ø 20-30 16x2 Zinc

    RIVA PROP NUT COMP. Ø 20-30 16×2 Zinc

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  • RIVA PROP NUT COMP. Ø 20-30 16x1,5 Zinc

    RIVA PROP NUT COMP. Ø 20-30 16×1,5 Zinc

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  • MTF PROP NUT COMP. Ø20-30 not threaded Zinc

    MTF PROP NUT COMP. Ø20-30 not threaded Zinc

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  • RIVA PROP NUTCOMP. FORO N.FIL. Ø 20-30 Zinc

    RIVA PROP NUTCOMP. FORO N.FIL. Ø 20-30 Zinc

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  • MTF PROP NUT COMP. Ø20-30 14X1,5 Zinc

    MTF PROP NUT COMP. Ø20-30 14X1,5 Zinc

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  • RIVA PROP NUT COMP. 14x1,5 Zinc

    RIVA PROP NUT COMP. 14×1,5 Zinc

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  • RIVA PROP NUT COMP. Ø 20-30 14x1,5 Zinc

    RIVA PROP NUT COMP. Ø 20-30 14×1,5 Zinc

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  • Ferretti propeller anode Ø200, Zinc

    Ferretti propeller anode Ø200, Zinc

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  • Ferretti propeller anode Ø190, Zinc

    Ferretti propeller anode Ø190, Zinc

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  • Ferretti propeller anode Ø185, Zinc

    Ferretti propeller anode Ø185, Zinc

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  • Ferretti propeller anode Ø160, Zinc

    Ferretti propeller anode Ø160, Zinc

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  • Riva propeller nut Ø180 RIVA OPERA 80 Zinc

    Riva propeller nut Ø180 RIVA OPERA 80 Zinc

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  • Riva propeller nut Ø170 RIVA DOLCE VITA Zinc

    Riva propeller nut Ø170 RIVA DOLCE VITA Zinc

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  • Riva propeller nut Ø120 RIVA OPERA Zinc

    Riva propeller nut Ø120 RIVA OPERA Zinc

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The various types of cooling water systems

There are three types of cooling systems:

  1. Direct cooling: a cooling water system whereby water is pumped into the engine block by a impeller pump.
  2. Indirect cooling: a separate cooling water system (also called intercooling or heat exchanger system) in which there is coolant in the engine and cooling water is pumped through a heat exchanger by means of an impeller pump.
  3. Indirect keel cooling : a keel cooling system, in which cooling pipes with coolant run under the boat. With the latter system, a wet exhaust is not possible unless you have installed an additional impeller pump or electric pump.

Dry or wet exhaust?

Choose a wet exhaust. With a wet exhaust, the noise is muffled by the water. You can also use a rubber exhaust hose because of the lower temperature. <read more>