1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 42Get this manual
OUTBOARD MOTOR INSTALLATION
Selecting Accessories For The Outboard
Genuine Quicksilver Parts and Accessories have been specifically designed and tested for this outboardSome accessories not manufactured or sold by Quicksilver are not designed to be safely used with this outboard or outboard operating systemAcquire and read the Installation, Operation, and Maintenance manuals for all selected accessories
Installing Outboard
1Measure the transom height of your boatThe boat bottom should be aligned or be within in(25mm) above the anti-ventilation plate of the outboard0-1in(0-25mm)