Direct Coupled Application?

[WBL skier]

Does anyone know what this means? It is from the Indmar owner's manual.

UNUSUAL VIBRATION

If your engine is used in a direct coupled application

(inboard) you need to know that damage to the drive line

(propeller, shaft, strut and coupling) can cause vibration.

You may feel vibration if damage is severe.Vibration in

the drive line will cause excessive wear on transmission

and engine components.

[electricjohn]

If your prop shaft, prop, or strut get bent. It will cause vibration which can go all the way in to your tranny or motor, causing damage. This is not as likely in a v-drive (non direct-drive) application.