D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS
Page 11 of 90
Exhaust System
IMPORTANT: It is the responsibility of the boat manufacturer or installing dealer to
properly locate the engine and install the exhaust system. Improper installation may
allow water to enter the exhaust manifolds and combustion chambers and severely
damage the engine. Damage caused by water in the engine will not be covered by
MerCruiser Warranty, unless this damage is the result of defective part(s).
Determine if an exhaust riser kit or a water lift muffler kit is required, by taking measurements
(a) and (b), with boat at rest in the water and maximum load aboard. Subtract (b) from (a)
to find (c). If (c) is less than specified in chart, an exhaust riser kit must be installed.
Model
(c) = (a) Minus (b)
All Models
(c)
Must Be
13 in. (330 mm)
or More
merCruiser
a
b
c
d
Typical Engine Without Risers
a -
From Waterline to Top of Transom
b -
From Highest Point on Exhaust Elbow to Top of Transom
c -
Equals (a) minus (b)
d -
Waterline at Rest
