300 hours is like 20,000 miles on your car. I change mine every 50 to
100 hours, once a year minimum.

Thanks for all you responses
100 hours is what I have been doing and I thought 300 sounded wrong. I
will work towards 50-100hrs. Thanks
Does 30 weight sound right?

by the way, even with the short season we have in Boston, I can't
believe that people would not make the time to use the boat for more
than 100 hour in a season.
Shame on you who let the season slip away. Boating in lousy weather is
better than not boating.