While most Outboards Do not Have a Hour meter, I understand they can be easily installed On a Message Board, Someone Suggested Keeping Track of How Much 2 Cycle Oil you use. ( Of course this applies to 2 stroke engines only) On PreMix Systems(OIL Added Directly To Gas) Ratio is 50:1 on Oil Injection it is approx The Same.. You can approximate How Much Gas You Burn over a period of time and get an idea of How Much a Motor is used... I also heard that a typical recreational boater has approx 50 Hours per season on a motor.