Is the Bravo ratio determined in the upper gear set or the lower? How about the Volvo Penta 270s or 280s? Thanks, Bill
Is the Bravo ratio determined in the upper gear set or the lower? How about the Volvo Penta 270s or 280s? Thanks, Bill
1971 Donzi 18' 2+3
1985 Eliminator 23' Daytona Offshore - Kevlar hull
1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
1989 28' Team Warlock Offshore - single 548CID/600HP
1990 23' Warlock Offshore - single 525HP
Bill from Denison, TX - Lake Texoma
Bill on the Volvo 270 & 280 drive the ratio changes are made in the lower foot. Mark
Thanks Mark,
I was almost positive of the Volvos, but I could not remember where the ratio is determined with the Bravo. Hopefully someone will chime in. Bill
1971 Donzi 18' 2+3
1985 Eliminator 23' Daytona Offshore - Kevlar hull
1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
1989 28' Team Warlock Offshore - single 548CID/600HP
1990 23' Warlock Offshore - single 525HP
Bill from Denison, TX - Lake Texoma
Bill I called a friend and he said it's a combination of top and bottom gear sets on the Bravo drive.
Thanks guys. So if you install a 1.5 lower on a 1.36 ratio Bravo drive, you would end up with a strange ratio in between a 1.36 and 1.5? I am asking since I just bought an IMCO Extreme 1.36 drive with a conventional looking lower Bravo lower and want to install an IMCO SC lower foot on it. Thanks in advance, Bill
http://www.ebay.com/itm/330688999797...84.m1497.l2649
1971 Donzi 18' 2+3
1985 Eliminator 23' Daytona Offshore - Kevlar hull
1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
1989 28' Team Warlock Offshore - single 548CID/600HP
1990 23' Warlock Offshore - single 525HP
Bill from Denison, TX - Lake Texoma
Seems that the gearing in the lower of a Bravo is only different on Bravo III"S and just for diesel power, Gas appears to be all the same on all three Bravos.
http://www.mercruiserparts.com/Show_...ND+DRIVE+GEARS
http://www.mercruiserparts.com/Show_...G%28BRAVO+I%29
http://www.mercruiserparts.com/Show_...28BRAVO+III%29
machinist ,bore it deeper,ream it bigger, and lap it to a fine finish
https://www.facebook.com/photo.php?v...=2&theater
So it looks like the Bravo 1 drive is determined by the upper gear set while the Volvo Pentas are determined by the lower gear set. It looks like there were no alternative sets for the Bravo 1 lower gear set - just the upper which is apparently what determines the ratio. Correct? Bill
1971 Donzi 18' 2+3
1985 Eliminator 23' Daytona Offshore - Kevlar hull
1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
1989 28' Team Warlock Offshore - single 548CID/600HP
1990 23' Warlock Offshore - single 525HP
Bill from Denison, TX - Lake Texoma
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