The 1973 model, 7.5 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
what does a 1991 mercury 150 outboard weigh
An 9.8 hp Mercury outboard, serial number 3614764, is a 1973 year model.
An 85 hp Mercury outboard, serial number 3858432, would be a 1973 year model.
The lower cowl on a vintage 1973 Mercury 9.8HP outboard motor with 4 retaining bolts. They are passed through the cowl and directly into the body of the boat.
A 4 hp Mercury outbard, serial number 3533703, would be a 1973 model.
A 9.8 hp Mercury outboard, serial number 3611434 would be a 1973 year model.
The 1973 model, 7.5 hp Mercury outboard, requires 6.8 oz. of gear oil.
A 9.8 hp Mercury outboard, serial number 3485636, would be a 1973 year model.
A 9.8 hp Mercury outboard, serial number 3485809 would be a early 1973 year model.
My 75 Johnson is 50:1. If you use a synthetic oil you won't need to worry about it and no more smoke from too much oil
Champion L76V
The proper mixture for that motor is 50:1. Approximately 2.56 oz. of oil to 1 gallon of gas.......5.12 oz. of oil to 2 gallons of gas....etc..