Once a year. I waited 2 years this last time because I didn't use the boat very much. It is also the one with the site bowl. I went to take the old filter off and the site bowl popped off spilling gas down in the compartment. Even a better reason to change every year. Can't imagine how that would have went if it would have popped off on the water.
__________________

1994 Wellcraft V21
|