Prop replacement?

[Polaris]

Managed to bend and nick my bravo 3 props (1999 Searay 270) on sandbars, etc. Saw a used bravo 3 prop set, 30 pitch, for sale on Craigs List for $375. I have only the online owners manual so have no idea the pitch on my current props. So my questions are:
- How do I determine the pitch on my current props? Printed on the prop?
- Would it make much difference if the pitch isn't exactly the same (I have read the info about "lower pitch, lower top speed", etc.)
- Is replacing the props a fairly easy DIY job? Need special tool(s)?

Thanks.

 

[NotHerDecision]

I would just recommend you take your props to a prop shop and have them reworked. You can have them adjust the pitch and cup if need be as well. Props are finicky things and if yours run like they should (before the damage) then you should keep them.

To answer your questions...

Pitch is probably printed on your props but it could have been changed by a prop shop in the past and they wouldn't change the markings.

It makes a difference if the pitch, cupping, blade material, and number of blades are different. As well as the weight and manufacturer. This is overly basic but the more pitch the more it pushes your boat through the water in 1 RPM so the harder your engine works. There is a sweet spot based on your engines, the outdrives, the weight of your boat. So I wouldn't be inclined to buy another's props unless you have done a significant amount of research.

Changing them is not hard. You probably need a prop but wrench and a puller.

 

[Boater420]

From my past experience the pitch and diameter are stamped on the prop and simple tools should be enough to do the job.

As far as making a difference, yes the pitch of a prop is set specifically to achieve RPM's that will not over work the engine. Adjusting the pitch will either effect "out of the hole" or as you mentioned "top end" performance. If it was me I'd take the old ones in and have them re-worked by a prop shop.

 

[Winch1995]

I just got a new prop and I went with the factory spec. It is key that you be able to achieve WOT RPM.

 

[Lazy Daze]

Polaris, as mentioned above, you don't want to start messing with different prop pitches. It's best/easiest to stay with the standard setup. The pitch will stamped right on them - but you can look/download the prop matrix on Sea Ray's website and look up your boat. 30" will be WAY too much. I agree - get them fixed. From the way you described the damage, they sound reconditionable.

Easy to replace (no harder than any other prop change), but the inner/forward nut is huge and it's easiest done with a Bravo 3 prop wrench. Google or search on this site - lot's and lot's of info already available.