1989 ForceMercury outboard ID sticker wore off

"I just bought a boat that has

"I just bought a boat that has a 50 hp Force outboard on it. The boat is a 1989, and as far as I can tell it's the original motor. I'd like to get all the motor particulars but when I looked at the ID sticker it's blank, the numbers are faded off. Are they located anywhere else on the engine also??
Also, I know I'm not a total idiot, but I don't remember seeing an oil tank in the boat and the motor IS a two stroke, do some boat's get premix put directly into the fuel tank??? I'm just used to having a removable fuel tank in a boat I guess.
Any help would be appreciated,
Alan"

"Alan...Yes you have to mix yo

"Alan...Yes you have to mix your gas and oil,there is no oil injection for that motor. If the ser. number is worn off as far as I know you cannot tell the age of the motor but if you have prestolite ignition ( blue coils and switchbox) the motor is late eighty's early ninety's"

"The age is about the only thi

"The age is about the only thing I do know about the motor, it is a 1989, but without serial numbers can I even buy a manual for it???"