What outdrive do I have?

JakesRinker300

I’ve tried looking up the serial number for it but it’s like the number isn’t correct. Ser# OF 390531

JakesRinker300

aero3113

It does @shawnmjr but I put the serial number in here without a space and it comes up as a Bravo

https://www.marineengine.com/parts/mercruiser-stern-drive/index.php?gclid=Cj0KCQjwma6TBhDIARIsAOKuANzAXWpiTRh-n75EU7X-4n1I98OOHPT3ZPtCuPEMCbmtbv6l-b0sWVMaAtneEALw_wcB

mvn

On Merc's parts catalog website, it comes up as MERCRUISER BI-ROTATION BRAVO 2 2.20:1

https://webapps.brunswick.com/literature/literatureSearch.do

mvn

On this website.....

https://public-mercurymarine.sysonline.com/Default.aspx?sysname=NorthAmerica&company=Guest&NA_KEY=NA_KEY_VALUE&langIF=eng&langDB=eng

it only shows results for 0F390531 (zero F, not OF) and shows as being B1, B2 or B3.

Obviously not a B3.  By comparing the lower unit parts diagrams, it appears to be a B2.  All other parts seem to be common amongst the Bravo's in that serial number range.

JakesRinker300

Ooooh boy lol so no final consensus?  I just need to buy anode kits and apparently they are specific. 

mvn

JakesRinker300 said:

Ooooh boy lol so no final consensus?  I just need to buy anode kits and apparently they are specific. 

From the photographs included with the parts diagrams in the link I provided in the last post above, I would say it's a B2.

Handymans342

Yes B2

JakesRinker300

shawnmjr said:

aero3113 said:

It does @shawnmjr but I put the serial number in here without a space and it comes up as a Bravo

https://www.marineengine.com/parts/mercruiser-stern-drive/index.php?gclid=Cj0KCQjwma6TBhDIARIsAOKuANzAXWpiTRh-n75EU7X-4n1I98OOHPT3ZPtCuPEMCbmtbv6l-b0sWVMaAtneEALw_wcB

Oh wow, every bravo I’ve seen was curved by where the rams mount and not straight down like that. Just googled some stuff and found one that looked like that and also read that the metal plate on the bell housing is only on bravo. I guess I learned something today. 

 

Shawn. I know what you’re saying. The alpha one gen 2s have that straight slightly angled back. 

MH342

You can also check the distance from prop shaft to ventilation plate. An alpha will fit ~15.25” max prop diameter while I believe B1 is 16” and B2 is 20” according to this link;  https://www.mercurymarine.com/es/us/dockline/prop-bites-prop-diameter-and-pitch/?article_type%5B%5D=how-to#:~:text=A%20MerCruiser%20Bravo%20Two%20sterndrive,faster%20speeds%20on%20lighter%20boats.

JakesRinker300

I’ve confirmed. They are Bravo IIs