When I try to start my 115 Hp Mercury inline six cylinder (mid 1980's) motor when it is cold the bendix will usually drop out of the flywheel after a few revolutions of the flywheel. I have to keep turning the engine over until the bendix finally stays engaged long enough to start the engine. I have replaced the starter and bendix, solenoid, and battery cables. The flywheel gearing looks fine. The battery is a new 1000 CCA one and was recently tested at 975 CCA. When the bendix drops out of the flywheel the voltage at the starter is between 11 -12 volts DC. <br /><br />Update<br />If I remove all the plug wires the bendix will turn the motor over as long as the key is turned. Do I need new plug wires? a coil? ??