I have an Evinrude 70 oil injected 1989 3 cyl. with power trim/tilt. trim/tilt seems to be working great, except when the engine gets to the trim posts going down and starts driving them in and also when i switch to the up position it makes one helluva noise for a few seconds, and then goes away, runs smooth and all is great. Is it normal for this noise to be there when it hits those hydraulic posts?