Honda BF135A, BF150A Outboard Motors Shop Manual., Page 359Get this manual

Honda BF135A, BF150A Outboard Motors Shop Manual., Page 359

Quality of the image is intentionally reduced!

BF135ABF150A 12) Remove the two 30 mm flange bolts and remove the cam chain tensioner while pushing the cam chain tensioner arm toward the cam chain (direction of arrow)
13) Remove the tensioner