I have a 2006 Tracker PT190 with Mercury Optimax 90 HP engine. From time to time when adjusting the trim it sticks and raises all the way up and stays engaged until I remove the cowling and tap the relay with a screwdriver. This appears to be totally arbitrary. I have had it happen while going full throttle down the lake as well as putting on the transom saver. I have replaced the relay multiple times and it still happens. Not sure what to do. Any ideas?