If you have any idea of what this might be, please post...
Metallic sound from engine or transmission on my
Nautique SAN 210 MY 2008.
After load up the engine/ transmission e.g. in a wakeboard pull, and the wakeboarder have fall or released the line followed by a fast cut of the gas done by the driver there will be a sound coming from the engine, transmission compartment. The sound are there every time when the gas / speed decrease with gear engaged down to idling or just above that. The sound only occurs when gear is engaged. The sound occur every time and most noticeable when coming from load down to no or little load on the propeller axle. It sometimes occurs when engaging the gear from idling engine and then just cruising with idle speed. The sound disappear when going up in speed with gear engaged, at least it is no longer noticeable in this case however it is possible that the engine noise level makes the sound to drown. The sound tend to increase both in occurrence and in level so I am concern that whatever causes it will break, just a matter of time. The sound is highest when listening from the hatch to water cut of valves. The Vdrive Gear/and the transmission box reach temperature that it is not possible to hold your hand on it.
Description of sound:
Metallic sound like coming from Gear teeth that are not aligned "to much space in between" hit each other back and forward. Loaded axel -> not loaded-> loaded and so onů. If it is something like this I do not know. However if it is then it will wear out the gear teeth and finally destroy it.