I just bought what I thought was a Johnson 20 HP Outboard. However the model number is 25R75B suggesting it is a 25 HP (I'm guessing the cowls are interchangeable). I think it also means it is a 1975 model. Anyway, I feel like an idiot but how do I remove the cowl from this thing?! What appears to be a release handle (top rear of cowl) will not move and I am afraid of breaking the fool thing. Can someone help me?