do any of you reach or exceed 100 hours a year?  

I was on the water 66 days last year, average at best 30 minutes a day, far a total of 1,980 minutes or 33 hours.

But then I don't boat ride much  

2005 mercury 200 efi, 4622 watermiles....291 hours. Have changed lower unit oil once, plugs once, gas filter once! Not all at the same time.

I have a 1988 suzuki 75 HP, on a 1990 Sea Nymph, bought boat/motor in 1995 with about 150 hours on the motor.Power head went this fall with just under 1900 hours on it.

Over its 18 year life it averaged over 100hour a year. and for the 11 years I have had it it has averaged well over 100hours a year

my '78 85 hp johnson has 227 hours on it. dad bought it new when he graduated in '78 and 99% of his fishing was done in an electric motor only lake. He's written down all the dates he's used it, right down to how much gas has been burned through it.