Here is a simple but very useful Excel SpreadSheet that will calculate precise Oil to Gas Mix Ratio's.
Just enter Ratio (example 50:1) and the gallons of gas or ounces of oil needed.
Hope you find it as useful as I have. Many friends are now using it!
Have just bought a used 1999 16' Tracker with a 50hp Mariner Motor (my first boat). Seem to have trouble figuring out the correct procedure to start the motor. Has a Choke button on console. I'm not sure when/when not to use it...Not sure how much throttle is appropriate? I would appreciate any...