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EXHAUST SYSTEM
Clear Hose Measurement Method
1. Obtain an 8–10 mm (5/16–3/8 in.) ID clear hose approximately 4.5 m (15 ft.) long. Install a
metal fitting or a weight on one end of the hose to keep that end of the hose below the waterline.
The fitting or weight must not restrict water from filling the clear hose.
a
IMPORTANT: On engines equipped with more than one exhaust elbow, perform the exhaust elbow
waterline height measurement on the side that sits lower in the water.
2. Put the weighted end of the clear hose over the side of the boat (port or starboard) that is
sitting lower in the water.
3. Submerge the clear hose until it is completely filled with water.
4. Place a finger over the open end of the clear hose before removing it from the water.
5. Coil the excess clear hose into the bottom of the boat bilge. Keep the coil of clear hose below
the waterline.
6. Align the clear hose with the engine's exhaust elbow and lift the end of the clear hose up to
the highest point of the exhaust manifold elbow.
7. Slowly take the finger off of the end of the clear hose. The water will seek the level of the water
outside of the boat. Hold the clear hose close in a vertical position.
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b
a -
Clear hose
b -
Fitting
c -
Unrestricted opening
b
a
a -
Waterline
b -
Top of exhaust elbow
c -
Waterline to top of exhaust elbow
measurement
b
d
c
d
32839
d -
Clear hose
e -
Weight
90-899883183 DECEMBER 2007
SECTION - 3
c
24865
e
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