Oil/gas is 100:1 or 3.84oz per 3 gallons of gas. Read the back of the Stabil to see what the mixture it recommends
Your engine is a little different it's a 25hp, it won't hurt it to run 75:1, even though Yamaha calls for 100:1. The op motor is an 8hp and just doesn't have the displacement, compression ratio, etc etc to run the extra oil.Quick question for ya Creek, why is it that my mechanic cringed when I told him I was originally running the 100:1 like posted on the motor. He made it sound like it was creating a very lean condition and told me to change it immediately. Sorry to derail..