I change mine out every other year at the most. A lot of Merc owners change there's after every season. Now that I'm running a large engine I'll do it every year. It's such an easy change, that you can do yourself,there's no reason not to do it.
Another great forum for any boat questions is: They are very helpful to.
http://bbcboards.zeroforum.com/
Another great forum for any boat questions is: They are very helpful to.
http://bbcboards.zeroforum.com/