I have a 1999 Mercury 2stroke 5HP outboard and the owners manual states 50:1 Gas/Oil mixture.
to of 25 km/h
50:1
50:1
not sure how wide your Jon boat is but I would go with a 3.5HP or 5HP outboard no bigger
50 to 1 oil and gas mixture
50:1
No.
do you need a boat licence for a 5hp outboard
ratio 50:1
0.030" for a champion or 0.020" for NGK and others.
A 5 hp Mariner outboard will do fine with a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.