just bought this boat last year... cleaned carbs and got it running after sitting for 2 years ... it ran rough for about a week and i lost spark ... after changing cdi i found it was the stator causing the problem ... changed stator and got unit running again ... now when i start it it will idle but run a little rough , i can rev it to about 4000 rpm in neutral and when i drive it, it will slowly get to about 4000 rpm but no higher .... it likes to chug and spit sometimes when i take off i assume it may be carb issues but im new to boat motors and would like to know what my max rpm should be and maybe what my carb adjustment screws should be set at. thanks in advance