Re: 1997 115 HP Offshore turning over slowly and starter sticking
Connections have to be clean and shiny inside, not outside where you can see it. Need to be tight also. Sometimes battery cables get bad at the cable connector crimp. Sometimes the starter solenoid contacts pit and the reduced surface area will not carry the 150 amperes required to start that engine. You only have a couple of volts to spare from a 12v battery and at 150 amps, resistance is out of the question.
Get a voltmeter and start at the starter terminals, both the STUD where the red wire is attached and the STUD (if it has one) where the black wire is connected. You need at least 10 volts at these terminals when spinning the engine in a ready to start condition to make it happen.
If you don't get 10 volts, work your way back to the battery, following the red lead but both can be at fault, till you find where you lost your voltage. Replace the defective component.
A little WD-40 on the starter bendix shaft will help too, but the voltage is the important thing.
While you are at it, whatever you find, go to your other engine and renew it too. Save you trouble later.
Mark