Often only a few bolts are used to hold the engine to the wing on large passenger aircrafts. Boeing (777 for example) only uses one bolt. It is quite large though and made of titanium. A C-130 Hercules uses 4 bolts to hold the engine.
6
6
There are 6 bolts that hold the trans. to the engine block.
Fighter aircraft typically have 1 or 2 engines.
Three bolts hold it to the engine.
6 bolts hold the transmission to the back of the engine.
There are 6 bolts in the bell housing that hold it to the rear of the engine.
The propulsion engine on a ship or aircraft is the MAIN engine. -Many aircraft and almost all ships have smaller engines just to produce electrical and hydraulic power.
A C15 Caterpillar engine has dozens of torque specifications for many different engine bolts. The head bolts should be torqued at 350 pounds.
Should be 6 bolts on the bell housing to mate it to the engine.
6 not including starter bolts
6 bell housing to block bolts.