50 to 1
The serial number OC111736 for a Mercury 15hp outboard motor indicates that it was manufactured in 1981. Mercury outboard motors typically use a coding system where the first letter represents the year of manufacture, and "O" corresponds to 1981 in this case. For precise confirmation, you can also contact a Mercury dealer or refer to an official Mercury outboard serial number guide.
A 15hp mercury requires a fuel to oil ratio of 50:1, roughly one pint of 2 cycle oil, to six gallons of gasoline.
A 15 hp Mercury outboard, serial number OD248758, would be a 1993 year model.
You can get it here: http://www.selffixer.com/outboard.motors/mercury/1986plus.Mercury.6-8-9.9-15HP.2-Stroke.Service.Manual.htm
70 LBS
No, you will certainly drown! Unless you want to start a new trend. Under water skiing.
50:1
Depending on the year model, a 15 hp Johnson outboard is listed as having a dry weight of 70 - 85 lbs.
50-1
It is the kill switch
Once the water pump is removed, the shaft will slide out, the 15hp driveshaft is free floating,