Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 35Get this manual
INSP ADJ
TOP COWLINGFUEL SYSTEM
2Adjust: Top cowling hook position
Adjustment steps (1) Loosen the bolts approximately 14 of turn(2) Move the top cowling hook either up or down slightly(3) Secure the bolts(4) Check the top cowling fitting and repeat the adjustment if necessaryNOTE: Moving the latch towards the seal will loosen the top cowling Moving the latch away from the seal will tighten the top cowling