hi everyone . my neighbour just bought a 1986 larson with a 120 johnson on it . it has a 15 gallon tank in it . the guy told him to put 3 1 litre bottles of oil in it for every 15 gallons of gas . i told him i think that is to much oil . i told him i use a 1 litre bottle of oil for 10 gallons of fuel in my boat . do you think he is using to much oil ? or it could be that i am not using enough oil . thanks ..
