Do bravo3 counter spin props need to be aligned......

SERENDIPITY

Ever since my mechanic greased the prop spines  i seem to have lost some   speed
I have twin 6.2 on my  Rinker 342. Do they have to be aligned . Seem to be reving fast but not moving fast as i used to  .Tks for your input..Rick.

Trashman

Yes they do.   And the nuts need to be properly torqued.  

LaRea

I've always wondered about this.  Somewhere in the rotation, there will always be a point where the props are "out of phase" as shown in the picture from @Trashman .  My question is:  On a low-speed cruiser, how much does it really matter whether that point occurs at top dead center as shown, rather than somewhere else?  

@Serenity is not a racer.  Would alignment make enough of a difference to notice it and post a message about it?  I can see where a random alignment might not be "optimal" in the engineering sense, but I'm not sure it would matter at 30 MPH. 

reneechris14

When both props meet at the top it make a wash off cavilation plate.so I have read.

Michael T

The tech has always made a big deal of aligning my props...as Al said.

SERENDIPITY

Tks Trasman  can you send me the link of the  picture of the aligned props  tks  again R

bazza

I have a VP dsp duo prop on my 280 I have looked in my manual and found no mention on a particular re assembly prop spacing, can this only apply to the Bravo 3 ? I would be grateful for any instructions I may have missed. Thanks Bazza 

randy56

bazza, it only takes 10 minutes, to change the last prop, and 1 1/2 inch socket. Try it next time the boat is out of the water. Reminder: put some grease on splines before reinstall. 
Prop alignment is critical for proper thrust wash. Volvo, Merc, or diesel. 

bazza

Thanks Randy 56 Boat out of water later this month, I have all the tools, I will do as you suggest, thanks again Bazza