Re: Drive Ratios
Here goes, from a 1993 catalogue but most are still valid.<br /><br />It's a lot of numbers:<br /><br />Merc/Mariner 2.5hp, 3.3hp is 2.18<br />4hp, 5hp is 2.15<br />6hp is 1.84<br />8hp, 9.9, 10, 15 is 2.08<br />20, 25 is 2.25<br />Mariner K 25 is 1.77<br />Mariner 30, Marathon 40, K40 is 1.84<br />Mariner 40 (2 cyl) is 2.0<br />Merc/Mar 50, SeaPro 55, 60 is 1.64<br />75, 90 is 2.3<br />100, 115 is 2.07<br />135, 150 is 2.0<br />150xri, xr6, Magnum Efi, 175 xri & Efi, 200 all is 1.87<br />275 is 1.64<br /><br />Alpha One 3.0 is 1.98<br />4.3 is 1.84<br />5.0 is 1.65<br />5.0LX, 5.7, 350 Magnum, 7.4 Bravo, 454, 502, 465, TRS is 1.50<br />5.0, 5.7 Bravo Two is 2.20<br />7.4 Bravo Two is 2.00<br />Diesel Bravo One is 1.50 except D254 which is 2.00<br />Diesel Bravo Two is 2.00 except some D254 which is 1.81<br /><br />Johnsons:<br />(Johnson specifies as xx:yy)<br />Commercial series:<br />6.5hp is 13:29<br />10 and 14 is 14:29<br />25 and 40 is 12:21<br />45 is 12:32<br />65 is 12:29<br />100 is 13:26<br />125 is 12:27<br />155 is 14:26<br /><br />Colt 0.9kw, 3hp, 4hp and 4 Ultra is 12:25<br />4D, 5, 6, 8 is 13:29<br />GT10, 9.9, 15 is 12:29<br />20, 25, 30 is 13:28<br />40, 50, 60, 70 is 12:29<br />75E is 15:28<br />90, GT100, 110 is 13:26<br />120, 140 is 12:27 or 13:26<br />150, GT150, 175, GT175, GT200, GT225, 200, 225 is 14:26<br />300 is 17:30<br /><br />That's what I have. Hope it's useful.
<br />TIY