Yamaha 115-225 HP Outboards Service Manual, Page 59Get this manual
Q PERIODIC SERVICE
4Cowling hook adjustment
1) Push the top cowling sideways lightlyThe following position adjustment is reo quired if gap is made between top and bottom cowlings
2) Loosen two bolts by approximately quarter turn
3) Tap the end to make an appropriate moveTighten the bolts, replace the top cowling and then check the engagementRepeat the adjustment if necessary