Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 340Get this manual
AutoBlend Installation Recommendations Applying the following installation recommendations will optimize AutoSlend operation
Fuel Line Fittings
All fuel line fittings should be designed for 516 inch 1.0fuel lines
Fuel Lines
1Fuel line should meet the following requirements: aFuel line should be 516 in1.0bFuel line should be grey in color especially when exposed to direct sunlightAvoid black colored fuel linescFuel line should be free of kinks at all timesdFuel lines should be as short as possibleEliminate excess fuel lineeEliminate any coils in the fuel line that are below their connection pointsExample: Incorrect
Air Leaks