My outboard needs a new rotary assembly...I think. The three wires coming out of the part above the distributor are severed even with the housing. Isn't this a one piece unit? and is this motor worth fixing..it ran great up until this happened. I believe it is a 74' or 75' w/ a thunderbolt ignition. The serial # is 3073340. Any input from you guys would be appreciated...I wanna go fishing 