After looking over prop again i found this serial#<br />394753...with the letter M with a square around it.<br />The same M i found on my control and it was a OMC part.<br />Is this a OMC prop?<br />14.5 by 20 pitch Ss prop.<br />I'm running a 4.3 Cobra and getting 4200 rpms at 41 Mph.WOT,max...