Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 376Get this manual
2Remove tip over plate (a) 4Remove fuel filter (a) by pulling filter directly away from AutoBlend unit
3Remove two bolts (a) and washers (b) from fuel filter (c) using an Bmm wrench or screwdriver
Fuel Filter Installation
NOTE: a-ring seals are not replaceableReplace fuel filter if a-rings show signs of deterioration such as swelling, cracking or discoloration1Lubricate a-rings (a) on fuel filter with Quicksilver 2-Cycle Outboard OilThen install fuel filter()