2000-2005 Yamaha F40B Outboard Service Manual, Page 342Get this manual

2000-2005 Yamaha F40B Outboard Service Manual, Page 342

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(3) Install the backlash indicator onto the drive shaft (16mm (0.63 in) diameter) (4) Install the dial gauge onto the lower unit and have the dial gauge plunger contact the mark on the backlash indica