Twin prop rotation
 

Have my first twin drive boat
runnng stock 330 7.4 's with bravo i
not a speed demon.

Can i run both standard rotation?
I know it will pull -but how bad?

I've heard - good and bad- that you can run bravos either direction..

Opinions/suggestions

Why on earth would you want them spinning in the same direction? Spin them out.

new to the twin game
i'd rather have counter rot. But my drives/eng. Are standard rot. -hence the reversing the bravo to left rot. Can it be done? I've heard it both ways yes and don't do it

WOW... Don't do that. Dangerous and real bad idea. Sell one to buy the other. Spin out

The port drive is ran in reverse off the top gear to get left-hand rotation for spinning the props out. The cables are setup on the shifters so that when you move them forward the starboard drive is shifted into forward and the port drive is shifted into reverse.

is it hard on the drive?
I'd heard it could be done-but my mechanic frowned on it

Find a new mechanic... Both engines rotate the same. Like Knot said its in the gears. Every boat with twins has a LH drive and RH drive. The drive doesn't care which way its spinning.

thanks for the info

All twin engine Bravo drive boats are setup this way.

Yes, the Port drive is always trying to walk the upper gear thru the top cap but as long as you don't abuse it thru too much HP, hole shots, improper throttling, etc. you will get hundreds of hours of service out of both drives.

Not dangerous, I have a friend that had a 32' Pachanga with twin Alpha's that both spun RH rotation. No ill effects. But if you have Bravo's just do it right.

No such thing as a left hand or right hand Bravo 1. Their all the same. Rotation is determined by the cable connection on the shifter at the helm. Can certainly be changed easily. Beings it's a Bravo set up I think I would change it. Must not be much of a problem though if it's been run like this so far. I also have a friend with twin RH Alpha's on a 30 footer and has no complaints.

Your mechanic is not very smart then.

Nearly all twin engine boats with Bravo drives run with standard rotation engines and change prop rotation by reversing the drive rotation. Bravo's can spin either way.

Spin them out.http://www.bdoh.info/7.jpg

THANKS ALL - MY MERC GUY IS MOSTLY SINGLE/FISHIG/ETC JUST VERY CONSERVATIVE - RAISED HIS EYBROWS AT PUTTING A BIG BLOCK IN MY OLD 24/7 ...TOO MUCH POWER:lolhit:
BUT HE IS A GREAT WRENCH
ANYONE HAVE A HYDRMTV QIV 23 LH

What are the advantages or disadvantages to spinning them out rather than in?

Out=Stern lift. In=Bow lift.

Normally in is faster on most V bottoms. Downside is reverse around the dock can be tricky.

the boat will also lean over a lot more in turns, can be dangerous if you don't know what you are doing. Mine spin in, I get slightly better mpg, same top end though. Docking is a little tougher but I have gotten used to it. I did it for the bow lift.

jet what year is your boat?

Ext
1980 scarab-s 30'