Boat Requirements - Mercury MerCruiser Service Manual

Exhaust Angle Measurement
Measure the exhaust angle of each section of the exhaust system using an inclinometer as shown in the diagram below. Begin
the measurement at the exhaust elbow outlet continuing along each section to the exhaust exit point of the boat. All exhaust
angle measurements must be performed with the boat at rest in the water. Perform the first set of measurements without a load
in the boat. Perform the second set of measurements with the boat fully loaded. Refer to Loading Requirements.
a a
b
c

Boat Requirements

IMPORTANT: Consider the following requirements before performing the exhaust elbow waterline height measurement. No
prototype hulls or light layup hulls should be considered. Any measurement performed on nonproduction boats, prototype hulls,
or light layup hulls could be inaccurate and could result in product damage.
•
All boats that display a CE certification capacity plate must use the maximum capacity as stated on the CE
certification capacity plate to perform the exhaust elbow waterline measurement.
•
All boats that only display the US Coast Guard (USCG) capacity plate must use the maximum capacity as stated on the
USCG capacity plate to perform the exhaust elbow waterline measurement.
90-8M0099748 eng DECEMBER 2015
58574
b
b
58579
© 2016 Mercury Marine
Typical exhaust
a - Minimum 152.4 mm (6 in.),
Maximum 406.4 mm (16 in.)
b - Inclinometer
c - Exhaust hose or tube
b
Typical muffler assembly
a - Hose
a
b - Hose clamps
c - Muffler
d - 3.5 in. outlet
b
c
d
Installation
Page 2B-37