Cooling system

  • Reggiani prop nut shaft Ø50 Zinc

    Reggiani prop nut shaft Ø50 Zinc

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  • Reggiani prop nut shaft Ø20 Zinc

    Reggiani prop nut shaft Ø20 Zinc

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  • RIVA PROP NUT COMP. 1” GAS Zinc

    RIVA PROP NUT COMP. 1” GAS Zinc

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  • RIVA PROP NUT COMP. Ø 35-50 1" W Zinc

    RIVA PROP NUT COMP. Ø 35-50 1″ W Zinc

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  • RIVA PROP NUT COMP. Ø 35-50 1" GAS Zinc

    RIVA PROP NUT COMP. Ø 35-50 1″ GAS Zinc

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  • RIVA PROP NUT COMP. 33x2,0 Zinc

    RIVA PROP NUT COMP. 33×2,0 Zinc

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  • RIVA PROP NUT COMP. Ø 35-50 33x2,00 Zinc

    RIVA PROP NUT COMP. Ø 35-50 33×2,00 Zinc

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  • MTF PROP NUT COMP. Ø35-50 30x2 Zinc

    MTF PROP NUT COMP. Ø35-50 30×2 Zinc

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  • RIVA PROP NUT COMP. 30x2,0 Zinc

    RIVA PROP NUT COMP. 30×2,0 Zinc

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  • RIVA PROP NUT COMP. Ø 35-50 30x2,00 Zinc

    RIVA PROP NUT COMP. Ø 35-50 30×2,00 Zinc

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  • MTF PROP NUT COMP. Ø35-50 26x2 Zinc

    MTF PROP NUT COMP. Ø35-50 26×2 Zinc

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  • RIVA PROP NUT COMP. Ø 35-50  26x2 Zinc

    RIVA PROP NUT COMP. Ø 35-50 26×2 Zinc

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  • RIVA PROP NUT COMP. Ø 35-50 26x2 Zinc

    RIVA PROP NUT COMP. Ø 35-50 26×2 Zinc

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  • RIVA PROP NUT COMP. 24x2,0 Zinc

    RIVA PROP NUT COMP. 24×2,0 Zinc

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  • RIVA PROP NUT COMP. 24x2,0 Zinc

    RIVA PROP NUT COMP. 24×2,0 Zinc

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  • RIVA PROP NUT COMP. Ø 35-50 24x2 Zinc

    RIVA PROP NUT COMP. Ø 35-50 24×2 Zinc

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  • MTF PROP NUT COMP. Ø35-50 not threaded Zinc

    MTF PROP NUT COMP. Ø35-50 not threaded Zinc

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  • RIVA PROP NUT COMP. FORO N.FIL.Ø 35x50 Zinc

    RIVA PROP NUT COMP. FORO N.FIL.Ø 35×50 Zinc

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  • RIVA PROP NUT COMP. 24x1,5 Zinc

    RIVA PROP NUT COMP. 24×1,5 Zinc

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  • RIVA PROP NUTCOMP. Ø 35-50 24x1,5 Zinc

    RIVA PROP NUTCOMP. Ø 35-50 24×1,5 Zinc

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  • RIVA PROP NUT COMP. 20x2,5 Zinc

    RIVA PROP NUT COMP. 20×2,5 Zinc

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  • RIVA PROP NUT COMP. Ø 20-30 20x2,5 Zinc

    RIVA PROP NUT COMP. Ø 20-30 20×2,5 Zinc

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  • RIVA PROP NUT COMP. 20x2,0 Zinc

    RIVA PROP NUT COMP. 20×2,0 Zinc

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

    RIVA PROP NUT COMP. Ø 20-30 20×2 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>