I have a 75 hp chrysler, model number 75673, serial number 5225, not sure of the year on it, but upon looking at the lower unit today, i think i might have found a problem, it seems to have a cracked housing around the prop, pictures enclosed, and im not sure what the piece name is to even begin to look for a new one the pice show the part well, and it moves more if i shift the drive into gear , any help identifing the part and how it could be fixed or replaced is greatly appreciated.<br />Thanks<br />Shane <br /> (pictures enclosed 2 on the site prop 1 and prop 2)<br /> pictures