Exhaust Hose Connections-Inboard - Mercury MerCruiser Service Manual

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In‑line mufflers, collectors, and hoses must self drain after engine shut‑down. Refer to Mercury MerCruiser Product
Applications Manual
Exhaust Hose Connections—Inboard
Hot spots in exhaust hoses can damage hoses and cause leaks. Ensure that discharge water from the exhaust elbow flows
without restriction through all hoses and fittings.
Exhaust hoses must be properly installed onto the exhaust elbow outlets. Discharge water from the exhaust elbow must flow
around the entire inside diameter of the hose to avoid causing hot spots that could burn through the hose. Exhaust hoses must
be installed at the angle shown following.
Correct
a - Exhaust outlet centerline
b - Parallel with crankshaft centerline
c - Exhaust angle 14° ± 5°
Secure all exhaust connections, including those at the exhaust elbow, with two hose clamps. ABYC standards also specify the
use of stainless steel clamps with a minimum 13 mm (1/2 in.) bandwidth. Do not use spring tension clamps.
90-8M0099748 eng DECEMBER 2015
NOTICE
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a
c
b
Hose clamps
33234
Incorrect
© 2016 Mercury Marine
Installation
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