Mercury/Mariner Outboard Starter - 10 ToothThe outboard starter will fit Mercury /Mariner, 50-90 HP/65 HP Jet, and 10-tooth drive gear. ARCO advises using a fully charged battery - A weak battery can damage the starter and starter solenoid.  And to also clean all connections - A corroded connection creates resistance, lowering the amperage required for an efficient starting circuit.Features:Dynamically tested and packaged for out-of-the-box performanceNickel-coated and epoxy-painted to reduce corrosion Sealed to minimize water intrusionDesigned for long life and optimum performanceArmatures are tested to withstand 50 times operating voltages (12 volts)Replaces:Mercury 50-44369A1Mercury 50-60315Mercury 50-65436Mercury 50-66015Mercury 50-66015-2Mercury 50-66015-TMercury 50-893891T*ARCO Assurance 12-month part and labor warranty protection