sea king 7.5hp

I recently inherited a Montgomery Ward Sea King 7.5 hp. The data plate reads: Manufactured by Clinton Engines Corporation. Model No. K750 3112E
S/N: 1140016
Type No. XTV52276

Does anybody know what year it was manufactured?
What is the oil to gas ratio?
What type of lower unit lube should be used?
Part # or where to buy an impeller?
Or even better if anybody has a manual or knows where I can get a manual.

Look again clOOser at your model/type number. If it reads KTV52275 it's a 1974. There is no XTV52276.
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