I have two Magnum 1.20's in my ov-10. Once broken in they are the cats meow. Brand new out of the box and to this day, I alwas start them with an electric starter and put my finger over the exhaust outlet forcing fuel from the tank into the carb. They like to start wet. With an OS f plug they are a very reliable and strong engine. I run all my engines from the Magnum line up, from 2 stroke .61's to .91's, and .91's to 1.80 in 4 strokes. It takes about 3-4 tanks to give them the required run in time so that they are a consistant performer.