I inherited an older Cobalt 19' with a Mercruiser 260. It hasnt been run in 2 years. I manually cranked the engine adding oil to loosen it and bought a cheap Walmart marine starting battery 24MS, When I crank it, I hear a loud click down by the slave solenoid. I replaced the solenoid hoping it was falty, one of the poles were broken anyways...but it is still doing the same thing. When I try to jump the slave solenoid, I hear clicking and there is electricity sparking, but NO TURNOVER. I know the battery is good, I have a 3 stage charger I put it on. Sorry to bomb this forum with a question right out of the gates, but Im getting harassed by the HOA for having it on the street. I changed the fuel, but thats not even an issue yet, because I cant get it to crank. All connections are tight and clean. Thank you for any feedback.