My Force 50hp 1 carb fires up with the choke handle up, revs high, and can run all day. I can't lower the choke handle to engage the throttle...it dies. I cleaned carb twice with carb cleaner and adjusted carb float (horz with carb body), I also replaced needle valve. The primer valve doesn't 'click' when ignition key is pushed in, but motor still starts right up with choke handle up and throttle in neutral. Both cylinders are at 125psi. Mixture screw is at 1-1/4. What can I try next to get this thing to idle without taking it to a shop? I'm not a mechanic and enjoy working on puzzles....I think I'm missing something on this one. Thanks.