I'm having trouble with my 1998 Johnson 25HP 2-stroke (Mod#J25RLEDA). My top cylinder is not receiving a spark from the plug. I've changed plugs, swapped coils and plug wires, but still no spark on the top cylinder. Was thinking it's probably the power pack, but wanted advice on other things I could check before I made the costly order for the new power pack ($79).<br /><br />Thanks for any help you can offer.