Well guys after playing arround with this motor ... I have replaced the rectifier and battery i now need an rpm gauge it dint work since i got this boat and is not working with the new rectifier either so i think is bad..... Now a while ago i was sugested to do a compression test and a spark check well i got the testers from an auto parts store and this is what i got on compression stardboard side top cylinder i got 115 and 120 at the bottom the port side top one got 110 and bottom was like 105-107 being this one with lowest reading what you guys think ....and spark it has good spark in all 4 cylinders ....now still when idle i dont like the sound it is not a smooth continues sound . It is kind of ruff and like it lacks air or something until it warms up a litle it kind of picks up i gues its ok so am not goin to bother much any more ....thanks for all the helpfull tips to all