My yamaha 1999 c60tlrx starter bendix wouldn't engage flywheel.Took battery to have tested before replacing other parts.The battery only had about 25% cranking amps of what it should have.Could i possibly have a bad rectifier thats not charging the battery while having a functional tachometer.I know it could just be a bad battery and I will replace that anyway.I just wanna make sure my rectifier is ok before I discharge the new battery by starting the outboard and not have it charge up when running.Also could the battery issue be why starter spins bendix gear,very strongly it seems without it raising enough to engage flywheel?