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What’s my Prop?

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  • What’s my Prop?

    Where do I go to find out what all this prop talk means. Hole shot? Pitch? What do the numbers on my existing aluminum prop mean. How can I use those numbers to determine what I’m using. Boat is a 19’ Sea Sport. 302 pusher hooked up to a Volvo Penta 290DP. Prop numbers are (rear) B385484832. Might be B36..... (front) B3854824. I appreciate any help you can give. Thanks

  • #2
    some light reading on Volvo Penta props

    https://www.volvopenta.com/content/d...er%20Guide.pdf

    your trying to compare oranges and potatoes. VP doesnt list their duo props by pitch like others. they specifically engineer their dp drive props in a series.

    with a 290DP, you can use the A-series (for diesels), the B-series (aluminum for gasoline motors), or the C-series (stainless versions of the B-series) or there is the new J-series that just came out for these drives.

    props 854824 and 854832 would be a B3 prop. set.

    if you have problems getting up on plane and you cant hit WOT, you drop down to a B2 set.

    if you are banging off the rev limiter, you go up to a B4 set.

    what problem do you have with your current props?
    Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

    1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

    Past Boats
    1970 Wooster Hellion - Merc 9.8
    2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
    1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

    What’s behind you doesn’t matter.Enzo Ferrari

    Comment


    • #3
      Sound advice above. Though I must say. I am not aware of any boat that’s original set up with the VP duo props...where it wasn’t propped really well from new.
      As mentioned your props are B3’s. Not aware of what engine that is. Normally the 290DP were coupled to very obvious and well known engines like the following
      4.3 AQ205/431
      5.0 AQ
      5.7 AQ271/570
      tamd31
      tamd40/41
      kad31
      kad42 etc etc.

      B3’s would normally suggest petrol GM engines but occasionally the Kad diesels.
      C series were the usual stainless equivalent with the J series the most recent replacement. There are F series too, just to confuse things a little. The A series were normally for the earlier diesels like the TAMD where there were 4 blades on the fwd prop and 3 on the rear. The Kad engines got away with the B and C series props because of the supercharged helping at low revs.

      Anyway. Likely bored you to tears by now, haha.

      Comment


      • #4
        Qboy, he could have a ford 5.0 or 5.8 as well.

        either way, you are correct. 99.99% of the time they come with the correct props unless you add power.
        Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

        1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

        Past Boats
        1970 Wooster Hellion - Merc 9.8
        2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
        1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

        What’s behind you doesn’t matter.Enzo Ferrari

        Comment


        • #5
          Originally posted by Scott Danforth View Post
          Qboy, he could have a ford 5.0 or 5.8 as well.

          either way, you are correct. 99.99% of the time they come with the correct props unless you add power.
          You’ll be right Scott. I’ve never seen one with a ford engine driving a 290. Not to say it didn’t happen. Just that as per usual here in the U.K. we have a very thin narrow spectrum of engine and drive packages that came here in any numbers.
          All the ones I’ve seen had VP badged GM petrols or variously sourced diesels driving them.

          Yeah. As you also say...the couple I’ve owned and know of currently and over the years are all amazingly propped to suit. Literally almost spot on.
          My old sealine 23ft cruiser had a AQ205 4.3 and 290DP and even at over 20 years old (at the time), she would see 4800 rpm on the dash tachometer and early to mid 30’s mph (on the dash). Great going for an old girl and a heavy hull like the sealine. No slouch our the hole either. I wake boarded off her a few times, haha.

          Comment


          • #6
            Thank you all for your responses. My concern is edge roughness. There are some bumps and humps but no chips or gouges. Thinking I might replace but repair sounds doable as well. I was hoping to get another 5 mph and up on a plane a few seconds faster, but don’t know if i could justify putting another thou out for that. I did read the VP prop catalog and see the new J series is where i would have to go to stay with the VP brand. Do the other prop manufacturers make a replacement that would perform as well as VP props? Can I take a rubber mallet and backer and pound out a few ridges or would the aluminum just crack and break. Just wondering! Thanks again

            Comment


            • #7
              Being honest you aren’t realistically going to get another 5 mph and better acceleration together easily

              Comment


              • #8
                Originally posted by Dandydan View Post
                Thank you all for your responses. My concern is edge roughness. There are some bumps and humps but no chips or gouges. Thinking I might replace but repair sounds doable as well. I was hoping to get another 5 mph and up on a plane a few seconds faster, but don’t know if i could justify putting another thou out for that. I did read the VP prop catalog and see the new J series is where i would have to go to stay with the VP brand. Do the other prop manufacturers make a replacement that would perform as well as VP props? Can I take a rubber mallet and backer and pound out a few ridges or would the aluminum just crack and break. Just wondering! Thanks again
                take your props to a propeller repair shop, pay the $200 to fix the two props, or spend $650 on a new set. you do not have the training or the tools to keep a propeller running true. I have had my B6 prop set repaired a few times. once because I hit a sunken sail boat in the channel

                if you had properly filled out your profile information, we could suggest a prop shop in your area.

                stay with VP for DP props.
                Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

                1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

                Past Boats
                1970 Wooster Hellion - Merc 9.8
                2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
                1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                What’s behind you doesn’t matter.Enzo Ferrari

                Comment


                • #9
                  Sign up today
                  Originally posted by QBhoy View Post
                  Being honest you aren’t realistically going to get another 5 mph and better acceleration together easily
                  True. Generally with prop experimentation you can get either a little more top end or better acceleration, one at the expense of the other. To get 5 mph more top speed and better acceleration you need to add about 50 hp.

                  Comment

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