Is there any tricks to removing the cover off an outboard? I have a Merc 25hp with only 1 release handle. Now the handle is loose when I turn it that the hook inside does not release the cover. I tried tightening the screw that the handle pivets on without any success! So far I am resisting the urge to smash it because the engine runs great, just need to open it to lower the idle, the boat trolls too fast!