My brother in law has an older Kawasaki, model unknown. I would guess an older 600 series. We have not been able to find anyway to check the oil. He has had the unit for probably 10 years and swears it has no dip stick. I must admit that I have not found it yet but there is no way a gasoline motor would have no way to check the oil. Ideas? I will empty the bed and start again. We just bought a Diesel 2510 and even with the manual the dip stick was a challenge.