How do I accurately ID this DuoProp pair?

[MachSchnell]

Could someone please help me accurately identify my DuoProp pair? This photo is from my 1990 Cobalt with a Volvo/Penta 5.7L engine.

Thanks for the help!

 

[ArcadianStar]

Re: How do I accurately ID this DuoProp pair?

It looks like you have two front props. Pull the cone nut off and take another picture...The back prop usually has a shorter hub, and fits inside the front prop...Scrape the paint off there should be numbers somewere or letter like F-5 or something.

 

[MachSchnell]

Re: How do I accurately ID this DuoProp pair?

That's interesting. I'll do that and we'll see what's up. Thanks for the advice!

 

[Maclin]

Re: How do I accurately ID this DuoProp pair?

There are markings on the outside parallel along the hub length. That looks like a 280 or 290 or DP-A drive, and if the props are aluminum they will be a B series and the markings will start with B then the pitch number 2-7.