Re: Not Starting, Day 5!!
if you've replaced the starter and slave solenoid, ALL your connections are good, clean, and tight, then it's fair to say battery is done. a battery produces 2 things. voltage, normally 12 (some will argue 12.5) and amperage, namely CRANKING amperage, which is a whole seperate deal from voltage. the cells in a battery hold both volts and amps. as the cells deteriorate from age, use, they can't produce the cranking amps needed to turn a motor over, even if it shows 12 volts. so yes, even tho your boat has power, in the form of volts, to run the lights, radio, blower and such, it may not have the amperage to actually turn the motor over to start it. any competent shop or even most auto parts stores can tell you if the battery is good or not by putting a load test on it. batteries generally last 3-5 years in the automotive world, but less time in the marine world, due to the length of time they sit without being charged or recharged. take battery in for load test, have tester look at the date code to verify age of battery.