The repair parts are probably still available through Bombardier, however, it is usually more cost effective to replace the tank. Most of the aftermarket tanks will work equally as well as oem, and at a reasonable cost.
The dry weight of a 1979 70hp Johnson outboard is 240 to 256lbs. depending on the model.
about 276lbs
The correct fuel mixture for a 1979 85 hp Johnson outboard motor is 50:1
A Johnson outboard, model number 85TL79R would be a 1979 model, 85 hp.
The correct spark plug gap for the 1979 model, 100 hp Johnson outboard is .030 in.
The 1979 model, 115 hp Johnson outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
About the same as a 115, same motor, different carburator. Should be around 350lbs.
1979 short shaft 15 hp.
A 1979 70 HP Johnson burns about 3.5 GPH at 3/4ths WOT
In 1979, the average cost for a gallon of gas was $0.86.
The average price of a gallon of regular unleaded gasoline in 1979 was $.90 c
The average price of a gallon of regular unleaded gasoline in 1979 was 90 cents.