Suitable for engines from 2 to 300 horsepower, SeaCover covers are offered in 7 different sizes for the top part of the engine. The dimensions include length, width, and height. The horsepower mentioned is indicative but is not the only factor for choosing your cover. Important factors also include the type of engine (two-stroke, four-stroke), the length of the tiller, the brand of the engine, and the year of its production.