On the engine shroud above the spark plug
yes
5/8 inch
If you get the model and serial numbers off the engine, you can probably find the part at a local mower repair shop or at Sear's.
6hp 5 3/4 horse is correct
Approximately, 1964, could be as old as late '50's
they are usually stamped in the flywheel blower housing or on the ohv valve cover or on a tag near the controls. the number is 5 or 6 digits possibly containing letters. the 4 numbers following that is the type
You would put the engine serial number under "Equipment Serial Number"
1961 serial number for 6d14 mitsubishi engine
Tractor serial number stamped on instrument panel name plate, Engine serial number stamped on side of engine.
The serial number is on the bottom left of the engine. It is sorta behing the frame. difficult to see.
Where is located the f150 engine serial number stamped in the block
The engine serial number on a 2.0 new Beetle engine is located on the crankcase. It is at the alternator support flange.