Chapter 3 TPD1317e In order to achieve sufficient height above the waterline it may be necessary to use the system shown in Figure 2. This also enables the two elbows to be rotated relative to each other to allow the exhaust hose to run towards the side of the boat. The arrangement shown raises the exhaust height above the turbocharger outlet by about 230mm (9 inches) - greater heights can be achieved if necessary by using the arrangement described in Section 3.3. Elbow with facility for water injection Insulating blanket Possible rotation Dry elbow Figure 2 - High rise exhaust elbow. Page 12