Now that this motor runs right, I'd like tilt and trim. Can you order a retrofit kit or bolt the engine to a later model mount? When I first got this engine, I thought the tilt bar that you can manually swing up into place while lifting the lower unit from behind the moter was for either towing or shallow water running, but I could not start the motor in that tilt position. What is that tilt bar for? Will these older motors run in the tilted position or are the carbs designed for straight up running only?