NOTICE
1. The outboard should be mounted high enough on the transom so the
exhaust relief hole will stay at least 25.4 mm (1 in.) above the waterline
when the engine is running at idle speed. Having the exhaust relief hole
above the waterline will prevent exhaust restrictions. Exhaust restrictions
will result in poor performance at idle.
2. Add 12.7 cm (5 in.) for XL models to the listed outboard mounting
heights.
3. The mounting height of the outboard must not exceed 63.5 cm (25 in.)
for L models, 76 cm (30 in.) for XL models. Mounting the outboard higher
may cause damage to the gearcase components.
Increasing the mounting height will usually:
• Reduce steering torque
• Increase top speed
• Increase boat stability
• Cause propeller to break loose during planing
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.
OUTBOARD INSTALLATION
eng 125
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