My friend has a late 80's OMC 200hp EFI model outboard engine on his boat. I'm not sure the year, but its on a outdrive style bracket that is attached to the engine.<br /><br />When we turn the key, the starter engages the fly-wheel, but it appears that no electrical current is getting to the plugs. batteries are fine and so are sparkplugs. One time I connected the positive of a jumper cable to the block and the other end to a plug boot, and it fired up instantly. Does this indaicate there is a short in the system or possibly the spark plug cables need to be replaced?