1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 399Get this manual
Trim and Tilt Motor Test ProcedureBosch 100 and 155 The condition of the trim and tilt motor can be tested with current draw test on no load test1On no load test the motor should have maximum current draw of amps at minimum of 6700 rpm at 12 volts2To test, place blue (up) wire to negative and the green (down) wire to positiveThe motor shaft from the drive end should turn in counterclockwise directionRepeat the test with the green (down) wire to negative and the blue (up) wire to positiveThe motor shaft should turn in clockwise direction
Trim and Tilt Motor Test Procedure Prestolite100 and 155