I have a 1993 380 Tournimate with the 6-71 Detroit. I am was looking for a tag on the transmission to know what type is installed. Could not find anything. Bought this boat back in Nov. and now trying to change all the oils & Filters. Does anyone know what transmission is on this boat and/or what Oil should be used? Looks like regular engine oil. Also is there a secondary fuel filter on the motors?