i have a 9.5 that runs great but i cant seem to figuer out where the rattle noise is comming from it sounds like something lose or vibrating but i have felt everything and cant seem to find what or where it is. i have listened to the powerhead with a screwdriver handle to my ear and it sound like its internal but i cant seem to pinpoint and area. it has done it since day 1 and i have been though just about every external part on the motor eather for inspection or replacing.it seems to be louder at idle. any ideas on this 1 will help.