150 black max question

[dale3joe]

Just got this boat with a 150 black max. The owner told me to mix 6 gallons of gas to 1 quart of oil. Is this right. I did what he said but it seems to smoke quite of bit to me.Also my boat pulls to the right. Which way do I adjust the trim tab

[boats.net]

Thats a 25:1 oil ratio. Should use a 50:1 ratio which is 1 pint(16oz) oil to 6 gallons gas.