Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 370Get this manual
AutoBlend Mixes Oil Rich Mixture Test or Check Results Corrective Action
1EXCESSIVE FUEL SYSTEM RESTRICTION"See AutoBlend Installation Recommendations" section 2CHECK FUEL LEVEL IN FUEL TANKFuel level should be sufficiently high to not allow air into the fuel pickup3INSPECT OIL PUMP OUTLET CHECK VALVESCheck for debris in check valve seatsIf seats appear clean, replace check valvesLeak test valvesIf test fails, check valve seats for debrisIf seats appear clean, replace check valves
Mixes correct oil! mixes oil rich mixture Fuel level lowFuel level highMixes correct oil fuel mixtureMixes oil rich mixture
AutoBlend OKCheck fuel level in fuel tank Fill fuel tank leak testCheck andor replace oil pump outlet check valvesAutoBlend OKRe-evaluate AutoBlend installation using "Auto Blend Installation Recommendations" andor use premium grade fuels