I have a Johnson 130 h.p. ocean pro. I am the original owner of the boat and motor and I do very exstensive maintence. However, every year since I bought the boat I have had to replace the engines voltage regulator. 4 times in 4 years. The only advice the dealer could give me was to replace it as needed however I need some real advice. P.S. I read the tip someone gave regarding this particular engine running rough at slow speeds and idleing poorly, i'm going to try their solution , it sure beat the dealers.