Honda GB40 Outboard Motor Manual., Page 12Get this manual
5 GENERAL DESCRIPTION
The major components of the HONDA Outboard Drive Unit consists the loop handle,upper case, holder case, bottom case and the joint tubeEach of these is made of special light weight alloys treated for corrosion resistanceThe loop handle is mounted the drive unit with rubber shock mounts minimize the vibration the handleA belt and chain are used transmit the driving power from the engine the propeller and tension clutch is incorporated on the drive belt provide smooth power transmission during engaging and disengaging of the power