Yeah you can get a 6 1/18 3 blade for your motor. Should help, I normally see a better holeshot and 1mph or so on top end when switching to 3 blade stainless impellers. You should be able to get one form Current river marine or jetdoctor.net . The 6 1/8 3 blade stainless blades are a lot thinner then the aluminum but there a lot tougher too.