Yeah. Jbturf is right. My Ultra was always sensitve to rain or washing with water. Let it dry out and it will be fine. Meanwhile--put a dry paper towel between the spark plug wire and the block to reduce the chances the wire is shorting out to nearest cooling fins.
Also I found the plugs on the older motors fouled out in a couple months. Put in a new spark plug--and check and replace plug, if needed, about 3 times per year.