Most Yamaha outboard motors that are purchased new have scheduled maintenance at certain intervals throughout their lifetime. But because there’s not an odometer on an outboard engine, discovering the exact time and mileage on the engine can be difficult. There are three ways in which to monitor engine use, and the first won’t work with older engines. Newer Yamaha outboards have kits that the average person can use to check the time and mileage on the engine. But with older Yamaha outboards, this isn’t possible. For older outboards, monitoring engine use with manual documentation can be a practical solution (in other words, keeping a record of the hours of use and mileage on the engine). The other solution is to take the outboard to a professional maintenance and repair shop and have them use specialized tools to check the mileage.
It’s important to maintain the outboard during its schedule maintenance sessions, and on a more regular basis, replace the spark plugs, grease essential engine components, and ensure the proper mix ratio of fuel to Yamaha 2M oil is being maintained.