Hi, I like to know gear ratio for my Bravo 1 / 377 MAG, bought as a complete unit 2014 by previous owner.
I have problems finding a prop that works for me, so I need to start finding the gear ratio for the drive.
Engine number is 2A443075
Drive number is 2A418704

Any one able to help me find that out?
I have seen in older posts someone have searched by the identification numbers.

Regards Retro2

Outdrive serial number should start with a '0'...

Mercruiser sterndrives and sterndrive information

OK, thank you. Those numbers was what I could find in the insurance papers.
I'll see if I can find some more.

The drive serial number you have is for the transom assembly. SEACORE BRAVO E T TRANSOM

The 2A for the serial is valid, they ran out of numbers that start with 0 a while ago.

Thank you. then I have to find the numbers on the drive it self when my boat is out of the water.
You don't know if there is a "standard" gear ratio delivered with the 377 MAG?

If you pull the drive, mark the drive shaft and prop shaft. Rotate the drive shaft 10 times and count prop, then divide by 10

OK thank you, I do know about that. Just liked to try find out while the boat is still in the water.

Hello Bajaman, i want to ask you if you know.
One sterndrive like bravo1 that was in diesel engine with ratio 1,5 to 1 is the same with an other bravo1 that was in petrol engine with the same ratio?