Not to repeat, but your Johnson runs on a 50:1 ratio. One pint to 6 gals of gas, or use a mix ratio table.
I just started using that in my 73 seaking 50 to 1.They have oil mix cups that have it all calculated on it down to 1/2 gallon of fuel for all different mix ratios.
REMAMBER,ETHANOL IN GAS will burn HOTTER,I ADD more oil,like me my outboards are OLD, RAT