There should be a label on the engine shroud or on the cylinder head with the serial number and model number on it. The label is usually on the front side.
the engine serial number is on the back of the block, behind the passenger side cylinder head. Not easy to access.
When you open up the cylinder, the serial number would be on the crane by the swivel and on the cylinder frame across from that serial number also.
On engine casing, passenger's side, on flange that bolts to transmission. Probably covered with engine gunk.
The engine serial number on1966 Ford Mustang(in-line 6-cylinder engine) on the driver's side fender, under the hood. On the engine look on the passengers side just above the freeze plugs near the bell housing
Serial number, and or engine or vehicle code are stamped on the cylinder deck on the right front of the block immediately in front of the right cylinder head. Casting numbers and date codes are on the right rear of the block just in front of the bell housing mounting surface.
You would put the engine serial number under "Equipment Serial Number"
In addition to the engine serial number, the horsepower rating is needed to determine the year model for a Mercury outboard.
You may have mistaken the '1' for a '2'..if your engine is a 4hp 2 cylinder it dates from 1978.
1961 serial number for 6d14 mitsubishi engine
Frame number is located below gear shifter,slightly forward on bottom frame rail. Engine number is next to cylinder,exhaust side of engine,below exhaust
The 3.0 liter V-6 engine number three cylinder is on the left hand side of the engine. The number three cylinder will be the middle cylinder.