2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 119Get this manual
Power unit 5Disconnect the stator coil couplers and pulser coil coupler 4, and remove the blowby hose and stator coil bracket 6
6Remove the wiring harness guide bolts
9Check that "I" marks and on the driven sprockets are aligned with marks and f, and that the" mark on the plate is aligned with the" mark on the cylinder blockAlign if necessary
NOTE: Move the wiring harness guide to position that will make servicing easy7Using hexagon wrench, turn the timing belt tensioner clockwise to push the timing belt, increase strength gradually, and then insert 5.0 mm (0.2 in) pin into the hole gNOTE: Leave the pin inserted into the timing belt tensioner until the timing belt has been installed8Remove the timing belt from the driven sprocket side