I have a 1977 v184 with a inline 6,tilt /trim is working..but its goes much slower going down than up. Up seems just fine, its just trimming down that seems really slow, maybe 1/4 speed as opposed to the up speed.....any thoughts? Trim pump is original squarish pump. pump is out of boat,i removed it today to clean it up a bit, I am thinking contacts need cleaning and to oil looked pretty old too.