Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 341Get this manual
Location of AutoBlend 1If possible, locate AutoBlend so as not to expose unit to direct sunlight2Mount AutoBlend at or below the same level of fuel tank3Mount AutoBlend as close as possible to the fuel tank
Accessories Installed in Fuel System
1If possible, eliminate the use of added restrictions such as water separating fuel filter, anti-siphon valve, switching valve or electric fuel priming pumpReplace these components immediately if not functioning properly2If fuelwater separating fuel filter is necessary, it should be located between the fuel tank and AutoBlend
Fuel and Fuel Filters