Honda Outboards BF40A/BF50A Service Manual, Page 240Get this manual
HONDABF35A45A
BTHE POWER TRIMTILT DOES NOT HOLD (Power trim &tilt type)
Cruise test with 10 trim angleDoes the power trimtilt hold? Does not holdHold Check for oil leaks around the power trimtilt cylinder bodyLeaks No leaksOK
'Check for oil leaks around the power trimtilt cylinder bodyNo leaks
Inspect the following items: Cylinder cap O-ring Power tilt motor O-ring Spool valve cap O-ring Manual relief valve O-ring
abnormal
I ReplaceI
Check the manual relief valve Closed