hi all ,,after my triumph with my rectifier i took the boat out ,,but i have been having problems with the tilt n trim motor ..i took it apart and it worked fine if i held it upside down ,but the right way up it just chugs slowly ,if at all ,,i did notice it has holes in the bottom of the motor so the brushes are swimming in hydrolic oil ,,,,is this corect? dont seem right to me ,i am thinkling the oil is insulating the brushes ,,,,,,,any help please ,,,,,,cheers