Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 329Get this manual
POWER TRIM
CAUTION
Failure to install spare tilt pin (or hardened bolts and nuts) in hole shown could result in transom bracket failure and possible injury8Move outboard "IN" until hole in swivel bracket "ear" aligns with the 3rd tilt hole in transom bracketLock engine in trim range by installing 38 in(9.5 mm) diameter tilt pin or two 38 in(9.5 mm) hardened bolts and nuts thru the transom brackets and swivel bracket in the hole shown
aTilt Pin Hole (Install Spare Tilt Pin or Hardened Bolts and Nuts) 9Open valve (a) and close valve (b)51374