i just bought a 92 kawasaki jetski, and am going over it. it is a 2 stroke engine, so would this be crank case oil?the oil injection pump is mounted underneath it.
If I remember correctly, that is NOT for oil. That should be an inspection port for the timing marks on the flywheel. For more info, check in with http://www.pwctoday.com and http://www.greenhulk.net.