Chapter 3 TPD 1399E
Page 12
Systems for operation at high angles of
heel.
Racing yachts may require special exhaust systems,
if the engine is to be run when sailing (for example, to
charge the batteries or to drive a watermaker pump).
A suitable system is shown on (A), in which a dry riser
(A1) takes the gases up to a safe height above the
waterline, on the hull centre-line. A water injection
elbow (A2) then cools the exhaust gas, and the
mixture of gas and water exits the hull either by a hose
through the transom or by a cross pipe (A3) running
between skin ttings on both sides of the hull, so that
the exhaust gases can escape from whichever outlet
is uncovered, and the raw water can escape through
the submerged outlet.
The minimum diameter of the dry part of the system
should be 40mm (1.6 inches) for the M65 and 76mm
(3 inches) for the M85T and the wet part of the system
should be not less than 63.5mm (2.1/2inches) for the
M65 and 76mm (3 inches) for the M85T.
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