Bravo 1 swap out to bravo 3

[have boat will travel]

Happy Labor Day all, I hope this is the right thred. Looking to pick up a ‘93 Cruisers 2670 7.4L with Bravo One outdrive.
1. Any opinions on if this boat can handle Lake Michigan with a single engine set up.
2. Is it possible to swap out the Bravo One lower unit to a Bravo Three.

 

[HT32BSX115]

Howdy, that boat seems big enough for any lake.

you can install a Bravo III on any bravo gimbal and you will see a performance improvement in hole shot. It may be 3-5 mph slower in top speed though.

cheers,
Rick

 

[tpenfield]

Happy Labor Day all, I hope this is the right thread. Looking to pick up a ‘93 Cruisers 2670 7.4L with Bravo One outdrive.
1. Any opinions on if this boat can handle Lake Michigan with a single engine set up.
2. Is it possible to swap out the Bravo One lower unit to a Bravo Three.

#1 - Boat's are stupid, they don't know where they are. It will handle Lake Michigan just as well as any other body of water. 26-27 feet is on the high end of what a single engine will handle. Single prop is even more concerning.

#2 - Bravo lowers can be swapped out if you want to get to a dual prop. May not be cheap to do that, but can be done, as Rick stated.

 

[alldodge]

2. Is it possible to swap out the Bravo One lower unit to a Bravo Three.

Agree, and will add, B1, 2 or 3 can be installed on a Bravo upper. There are differences in the cases, so look for which ones your putting together. Also note the ratio

 

[HT32BSX115]

2. Is it possible to swap out the Bravo One lower unit to a Bravo Three.

I more or less did the same thing with great results. (Although I swapped an OMG King Kobra with a similarly sized engine for a 7.4/Bravo III)

Let me also add that you do need to mind the ratios with a boat that big. I installed a 1.81:1 ratio in my 21ft approx 4000lb boat and got very good results.

If you're going to do it in a boat the size of yours, you'll probably need at least a 2.00:1 ratio and possibly a 2.20:1 ratio depending on your engine max rated RPM.

After noting your WOT RPM and speed with your current installation, (if your engine makes 4600RPM for example......probably MAX for your engine) you can probably get away with a 2.00:1 drive and 22p props.

A better choice might be a 2.20:1 ratio and 24p props, understanding you may need to go to 22p props.

Also, as Dodge indicated, if you choose to bolt a Bravo III lower onto your current "Upper", you will need to look up what your final ratio will be with your current "upper" gearset. (you may need to change the gearset or get a complete B3 drive)

With a boat your size and weight, you'll need to have a final ratio of no "higher" than 2.00:1 (I.E. Do not install a 1.81:1 drive or you may not find low enough pitch props to achieve 4600 RPM at WOT, trimmed etc)

All engine manufacturers recommend "propping" and engine to make MAX RPM at WOT when trimmed and (boat) loaded where you'll typically operate it.

Regards,

Rick

 

[Scott Danforth]

Since Cruisers is in Oconto WI and they do all their testing in Lake Michigan...,pretty sure the boat will have no problems on lake Michigan.

As Ted stated, boats are dumb, they really dont know where they are