How do I tell what drive ratio I have? 1990 5.7 Merc with Alpha.
Jul 30, 2007 #1 S shilo New Member Jul 10, 2007 62 Ravenna, Ohio How do I tell what drive ratio I have? 1990 5.7 Merc with Alpha.
Jul 31, 2007 #2 D Dave S Well-Known Member TECHNICAL Contributor Oct 3, 2006 6,014 Upstate South Carolina Boat Info Boatless Engines Boatless You can download Sea Ray's prop chart for your boat and it will also show you the gear ratio for your outdrive as well. Here is the pdf file link. http://www.searay.com/boat_graphics/sea_ray_prop_charts/1990.ENGINE,DRIVE AND PROP MATRIX.pdf I hope this helps out.
You can download Sea Ray's prop chart for your boat and it will also show you the gear ratio for your outdrive as well. Here is the pdf file link. http://www.searay.com/boat_graphics/sea_ray_prop_charts/1990.ENGINE,DRIVE AND PROP MATRIX.pdf I hope this helps out.
