i am new to this forum and new to outboard engines. I bought this boat last week and only started it on a water hose, it sounded good so i bought the boat. The engine is a 150 johnson model #j150eledb. I put it in the water and it started right up. it got on plane real fast and run good for a short while then it started losing power. it is like it started skipping on some of the cylinders. then all of a sudden it pickud back up and ran great again. checked compression and it was all good, new plugs, drained all gas and replaced. the next trip to the water it ran like a champ for a little while and after a couple miles i tried to adjust the trim and every time i pressed the trim button the engine would die and it started running rough again and would not even get on plane, so i idled around for a little while and it took off again and it run like a champ the rest of the day. today it ran great for about two or three miles and i pressed the trim button and it started killing the engine and it ran terrible. after a while of idiling around it started running good again. sorry for the long post I just lost on this one and I am ready to catch some fish. boat is 1996 hydra sports 175e if that matters thanks for any help