Product label says that it will fit up to a 225 HP outboard. I have a Yamaha 225 HP 4 stroke and it wouldn't fit. Wal Mart does not carry the next larger size either in-store or on-line (Attwood does make one a size larger, 225-300 HP).
Negatives: Poor, cheap, thin quality. drawstring has nothing it tie to but itself and it is very hard to undo when tied.
Positives: very reflective, seems to be waterproof. very lightweight.
Summary: good for blocking sun on engine cover. poor for weather protection. This $20 cover is worth more like $10.
My husband wanted this motor cover for our new boat. It is covering an 09 evinrude e-tec. It does fit it though you can see through the cover. Not sure how long it will last but for twenty dollars we were willing to give it a try.