1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 43Get this manual
Battery Connections CAUTION
For dual outboard installations, the BLACK (-) battery cable of each engines starter motor ground circuit, MUST BE connected to each other by common circuit (cable) capable of carrying the starting current of each enginesstarter motor[i.eA locally obtained battery cable connected between the NEGATIVE (- terminal of -) each outboards cranking battery
Set Up Instructions For Oil Injection System
CAUTION
Oil injected engines additionally, must be run on 50:1 gasolineoil mixture in the fuel tank for the first 10 gallons of fuelRefer to engine break-in procedure in the OperationMaintenance Manual
CAUTION
If an electric fuel pump is to be used on engines with oil injection, the fuel pressure at the engine must not exceed psi (41.1 kPa)If necessary, install pressure regulator between electrical fuel pump and engine and set at psi maximum