Honda Outboards BF40A/BF50A Service Manual, Page 239Get this manual
HONDA BF35A45A
2TROUBLESHOOTING ATHE POWER TRIMTILT DOES NOT MOVE UP OR DOWN (Power trimtilt type)
NOTE: Be sure that the battery cables are connectedBattery voltage must be 12 or above
Connect battery to the power tilt motorDoes the power tilt motor move? Move
Does not moveI Repair open or short in motor wireInspect the power tilt motor (P13-3)Remove the power tilt motor from the power trimtilt cylinder, and inspect the drive jointOK