Bravo 1 Lower swap ?
 

Got a Bravo 1X 1,36 year 2009 and want to swap lower with a 1,50 lower I got from 1999 not a x does it work? Thanks

Any help please,thanks.

Bjorn.

Yes. it will bolt right up.

Thanks Kaama,I did think it wold bolt on,but do you know if it can take the same power as the X lower drive,

It's the uppers that always break.

Lowers are the same on regular Bravo and X drives.
http://www.go-fast.com/mercruiser_bravo_sterndrives.htm

Thanks guys,I will inspect the 1,50 before I use it,its for a 27 Rib with a EFI 500,I dont like the idea of using the 1,36 and go down on pitc on the prop,I did use a 1,50 with a 26P Bravo prop last year and it was Ok,this drive is worn out,and I got a x drive 1,36 and a spear 1,50 lower to use.

Bjorn.

there are a couple places on web to check gear ratios, but i am pretty sure 1.36 and 1.5 take same upper gears. some of higher ratio drives use diff upper gear tooth counts.

The ratio is controlled by the upper gear set in Bravo 1's X's and XZ's. The lower gear sets are the same.
http://www.mercruiserparts.com/Show_...O+I%2FII%2FIII
http://www.mercruiserparts.com/Show_...%2FII%2FIII%29

XR's use the same upper gear set and use the lower to control ratios.
http://www.mercruiserparts.com/Show_...28XR+And+XZ%29

Ok,so now we are sure the gear difference are in the upper gear,so its no use to change the lower.

What pitch to use with my 1,36 drive when I used a 26 Bravo with my 1,50 drive ? Can I make it with a 24 P ?

Thanks.

Going from a 1.50 to a 1.36 is usually about 3" of pitch difference. You will need a 22 or 24 Bravo depending where your rpms were with the 26 and 1.50.
Yo want your rpms as close to 5200 as possible to make the most power on a 500efi. A custom labbed 24 would probably work best.

Thanks Griff,I do not fansy a new 1,50 drive for this boat now so I`ll try with a 24,its a pretty light 27 Rib boat,I got the motor out now for a light 400 hours service with new valvesprings and head gaskets,I did inspect the botom and I`m suprised,no wear to talk aboat on the bearings and pistons was clean with fresh springs,nice motors.
Bjorn.

I got the original old head gaskets,but I used the new style "steel gasket" on a procharger motor I got,what is your opinion around this new gaskets?