Cooling system

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  • Yamaha Skeg for  150/225hp Zinc

    Yamaha Skeg for 150/225hp Zinc

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  • Yamaha Bracket anode for 40-50hp Magnesium

    Yamaha Bracket anode for 40-50hp Magnesium

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  • Yamaha Skeg for 25-30hp Zinc

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  • Yamaha plate anode 75 HP XR6 Magnesium

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    Yamaha plate anode 75 HP XR6 Aluminium

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  • Yamaha plate anode 75 HP XR6 Zinc

    Yamaha plate anode 75 HP XR6 Zinc

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  • Yamaha cylinder head anode Ø24 H.7 Magnesium

    Yamaha cylinder head anode Ø24 H.7 Magnesium

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    Yamaha cylinder head anode Ø24 H.7 Aluminium

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  • Yamaha cylinder head anode  Ø24 H.7 Zinc

    Yamaha cylinder head anode Ø24 H.7 Zinc

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  • Yamaha cylinder head anode Ø20 H.7 Magnesium

    Yamaha cylinder head anode Ø20 H.7 Magnesium

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  • Yamaha cylinder head anode Ø20 H.7 Aluminium

    Yamaha cylinder head anode Ø20 H.7 Aluminium

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  • Yamaha cylinder head anode Ø20 H.7 Zinc

    Yamaha cylinder head anode Ø20 H.7 Zinc

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  • Yamaha  Bar  anode 30-40 HP Magnesium

    Yamaha Bar anode 30-40 HP Magnesium

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  • Yamaha  Bar  anode 30-40 hp Zinc

    Yamaha Bar anode 30-40 hp Zinc

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  • Yamaha Bar amode 150-200hp Zinc

    Yamaha Bar amode 150-200hp Zinc

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  • Yamaha Cut Down Skeg, 225-250HP Magnesium

    Yamaha Cut Down Skeg, 225-250HP Magnesium

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  • Yamaha Covered Skeg, 225-250HP Aluminium

    Yamaha Covered Skeg, 225-250HP Aluminium

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  • Yamaha Cut Down Skeg, 225-250hp Zinc

    Yamaha Cut Down Skeg, 225-250hp Zinc

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  • Yamaha small Bar anode 8-300HPhp Magnesium

    Yamaha small Bar anode 8-300HPhp Magnesium

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  • Yamaha Block anode for Sterndrive Magnesium

    Yamaha Block anode for Sterndrive Magnesium

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  • Yamaha Block anode for Sterndrive Zinc

    Yamaha Block anode for Sterndrive Zinc

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  • Yamaha Small plate anode for 25-30hp Zinc

    Yamaha Small plate anode for 25-30hp Zinc

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  • Yamaha Horseshoe for Sterndrive Magnesium

    Yamaha Horseshoe for Sterndrive Magnesium

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  • Yamaha Horseshoe anode for Sterndrive Zinc

    Yamaha Horseshoe anode for Sterndrive 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>

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