Re: yamaha 60 2003
That would be hard to tell, considering the style of the boat, all the weight of fuel, occupants, etc. My guess, not much more that 30 - 35. Congrats on the purchase. Make sure you check compression, pull the lower unit fill plug. Should be magnetic, check for metal shavings. Look for a good color to the oil, not milky. Should not be corroded inside the housing. The 60's are still being made as a F 60, 4 stroke.
Check out this test, should be your model...
I have had nothing but good things to say for the three Yamahas I have owned. They are stout and reliable!