I have just learned that the power pack(one of em) is out on a 1985 force 85 motor that I had taken into the shop how do I test to be sure and, The mech told me the other one was arcing to the block and half of it was out. I am very new to boats but I know these are expensive and wanted to know how to be sure and what price range should I expect to pay for new ones? is there different brands and are they comparible in price?<br /><br />Thanks in advance for reply....