Lifting Outboard; Determining The Mounting Height Of The Outboard Jet - Mercury 25 Jet FourStroke Operation, Maintenance And Installation Manual

Lifting Outboard

Use the lifting eye located aft of the flywheel to support the engine when
installing the outboard.

Determining the Mounting Height of the Outboard Jet

The following outboard mounting height settings will work good for most
applications, however, because of different boat/hull designs, the setting should
be checked by test running the boat. Refer to Water Testing.
• Installing the outboard too high on the transom will allow the water intake
to suck in air and cause cavitation. (Cavitation will cause the engine to
overspeed in spurts and reduce thrust.) This condition should be avoided
by proper height setting.
• Installing the outboard too low on the transom will allow excessive drag.
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