I agree with John about the 46LA It is a bushed engine and not as user friendly as the OS46AX .. The OS46AX is my favorite engine...The Magnum engines are pretty good for the price but for myself I like to spend the extra and get myself an OS, weather it be a four stroke or a two stroke...I just have better luck with them . Plus I deal with Horizion and if I have trouble with an OS they will back it up ...I do not know about the service on a Magnum