" Joe,
I believe I know the
" Joe,
I believe I know the reason for your question. Due to the metal to metal contact between the engine and the jack plate, the mounting bolts holding the engine to the plate tend to come loose. This is especially true with the larger HP engines. I have seen them shear off due to the owner not noticing them being loose. All of the prior replies have been accurate regarding the plate to transom bolts, but these engine to plate bolts are actually much more of a concern.
Fourty lbs. is sufficient touque, but maintaining this torque is the problem. I make sure and use nylock nuts along with lockwashers at this location. Jam nuts and locktite can't hurt either. Most importantly, check and retorque these bolts on a regular basis. Make it part of your pre-trip checklist. Good luck
Rick "