I have a 25hp 1955 Evinrude that dogs out when you throttle up. Basically the motor gets louder but the speed is just a bit faster than idle. II initially thought it may be the carb... (and it still could be) but after changing the spark plugs and messing around with the spark plug wires I found that when I pull the top spark plug wire off the engine kills. I don't really know how to test the wires, but I know that the bottom wire gives some spark because it shocked me when I touched it. <br /><br />My problem is that I don't know how to make sure that the wire is giving off enough spark. If anybody knows... how difficult is it to find spark plug wires for this old boy? Also, is it very difficult to change the wires?<br /><br />Thanks to anyone who can help.