Yamaha F100B F100C Outboards Factory Service Manual, Page 193Get this manual

Yamaha F100B F100C Outboards Factory Service Manual, Page 193

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Drive shaft and lower case (F100C) Disassembling the lower case
Checking the bearings
1 Check the bearings for pitting or rumblingReplace if necessaryNOTE: Install the claws as shownStoppe