Welcome guest, is this your first visit?
Member
Discoveries
 
Results 1 to 13 of 13
Like Tree10Likes
  • 1 Post By Mgumby16
  • 1 Post By N-Lionberger
  • 1 Post By okbasspro
  • 1 Post By Mgumby16
  • 1 Post By winners58
  • 1 Post By Hoser John
  • 4 Post By Hoser John

Thread: Keene p350s pump question

« Prev Thread | Next Thread »
  1. #1
    us
    Jun 2014
    East Coast
    164
    186 times
    Prospecting

    Keene p350s pump question

    So last year i picked up a semi homebuilt 5 inch dredge for a steal. The frame and floats are garbage but the rest is all pretty much brand new keene parts.

    I have been debating on selling the motor and pump because it is a briggs 18hp opposed twin and a keene p350s pedastal pump, which in my eyes is overkill for a 5 inch dredge at the depths i normally dredge at.

    My question is if i ditch the huge 18 hp motor and hook the pedestal p350s to say a 6.5 hp engine that is modded and now producing about 10 hp, or a 8 hp engine will this work to power a 5 inch dredge, or even a 4 inch?

    It may be that i just have to try it and see since its a rather odd engine/pump combo to dredge size match up.

    Thanks for the input!

    Click image for larger version. 

Name:	20181105_153434.jpg 
Views:	34 
Size:	1.44 MB 
ID:	1696560Click image for larger version. 

Name:	20181105_153254.jpg 
Views:	28 
Size:	328.3 KB 
ID:	1696559
    winners58 likes this.

  2. #2
    us
    Mine President, XPBC, GIH

    Dec 2013
    Arcata, California
    Fisher 1212-x Fisher Gold Bug 2 Whites 4900/SP3 Rocker boxes, Keene sluices, Bazooka sluice, 2.5", 4" lowbankers, highbankers. Witch Sticks.
    617
    685 times
    Prospecting
    I ran a p350 on an 8hp BS a season on my 4" I had the tweak the box to handle the increased flow.
    russau likes this.

  3. #3
    us
    Jan 2012
    Chickasha,Oklahoma
    796
    1261 times
    Prospecting
    A Proline 400 will do the trick on a 6.5 Honda
    russau likes this.
    http://www.mylandmatters.org/Maps/GeologyOK/GetMap

    http://www.mylandmatters.org/


    "If the Gold dont care neither do I"
    Shawn Pomrenke

    4" Proline 2" Jobe combo 2.5" Keene 2.5" subbie Drywasher Spiral Wheel Minelab Detector

  4. #4
    us
    Jun 2014
    East Coast
    164
    186 times
    Prospecting
    okbasspro -

    I know a proline 400 and honda 6.5 will run a 4, but i dont have one, Im just trying to work with what i have. If i but this setup on a 4 inch it will be a 16 inch wide overunder box. If i put it on a 5 inch it will be normal 20 inch wide box.

    N-Lionberger - Do you know which impeller your p350 had? I think mine has the one that keene says requires a 16hp or larger motor. I would think with a 10hp motor attached it would power a 5 inch, or a 4 inch overunder box ok.

    Thanks for the input.
    winners58 likes this.

  5. #5
    Make America Great Again

    Apr 2013
    Oregon
    1,600
    3662 times
    All Types Of Treasure Hunting
    its a matter of engine torque compared to the impeller bite.
    a diesel motor would be ideal, they can be expensive.
    I would say the 350s impeller might work ok on an 8hp
    just wouldn't have the umph to run a 6 inch
    a 5" or 4" would not be optimal but seems like you could get it to work,
    I took a pump off a 5hp and put it on a 3.5Hp
    it would start up at the 3600rpm then when the back pressure hit the jet
    it would be like shifting gears and could tell it was using all its torque just to keep up.
    work fine, seamed like it used more gas than it should.
    not sure if older 8hp or mid size impeller($195) fits in a 350s housing you'd have to ask if they are different.
    Keene pump parts
    could give Pat Keene a call he might have some options or tips to make it work.

    I have an 11hp on my 5" with the older impeller.
    Click image for larger version. 

Name:	DSC05539.JPG 
Views:	23 
Size:	810.2 KB 
ID:	1697080
    Last edited by winners58; Mar 29, 2019 at 10:43 PM.
    " A pessimist is an optimist with experience "

  6. #6
    us
    Mine President, XPBC, GIH

    Dec 2013
    Arcata, California
    Fisher 1212-x Fisher Gold Bug 2 Whites 4900/SP3 Rocker boxes, Keene sluices, Bazooka sluice, 2.5", 4" lowbankers, highbankers. Witch Sticks.
    617
    685 times
    Prospecting
    Not sure about the impeller, it's the stock setup for an older Keene 5" if I'm not mistaken. It had more than enough power to run my 4" I have dialed back to a 2x2.5" DK nugget pump on a 6.5 hp.

  7. #7
    Make America Great Again

    Apr 2013
    Oregon
    1,600
    3662 times
    All Types Of Treasure Hunting
    if you could find hose, jet & flare you could run a mini 6" using your 20" box.
    mo money, mo money...
    N-Lionberger likes this.
    " A pessimist is an optimist with experience "

  8. #8
    us
    Mar 2003
    Redding,Calif.
    5,833
    6633 times
    All Types Of Treasure Hunting
    That is a great pump but my only experience was with a 18hp on my 6" triple. VERY good pump but why do you think it's a 350s in particuliar?John Click image for larger version. 

Name:	02-28-2013 07;15;44PM clear creek triple 6.JPG 
Views:	31 
Size:	1.88 MB 
ID:	1697524
    russau likes this.

  9. #9

    Feb 2016
    69
    36 times
    All Types Of Treasure Hunting
    Quote Originally Posted by Hoser John View Post
    That is a great pump but my only experience was with a 18hp on my 6" triple. VERY good pump but why do you think it's a 350s in particuliar?John Click image for larger version. 

Name:	02-28-2013 07;15;44PM clear creek triple 6.JPG 
Views:	31 
Size:	1.88 MB 
ID:	1697524
    I’ve seen this pic of you dredge before and thought it was a 5”. Did you modify an old 5” or did that box come in a 6” also?

  10. #10
    us
    Jun 2014
    East Coast
    164
    186 times
    Prospecting
    John - I think it is a p350s, cause someone before me wrote p350s on the pump with sharpie. So i may not be. I happen to have a 6.5 predator motor that has been modded to produce about 12 hp, so im going to get a lovejoy connection and mate the two up and see if it will power my 5 inch. Ill be sure to take video of it. Should be interesting.

    If it doesnt work, ill sell the pedastal pump and buy a dahlke dp500 on a subaru 7 hp motor.

  11. #11

    Feb 2016
    69
    36 times
    All Types Of Treasure Hunting
    I think the issue you would have with using a smaller engine is that it would have a hard time staying in it’s optimal operating rpm range. If you are running at lower rpms then you arent hitting the peak power of the engine. They change the angle of the impeller blades to allow the different size engines to run optimally. Something that would likely work pretty well for you at a small cost is putting a belt drive on the pump and giving it an under drive, or gear ratio reduction. That would allow the engine to run at it’s best rpm range and the pump would put out about as much flow and pressure as it would with the proper impeller and a direct drive.

  12. #12
    us
    Mar 2003
    Redding,Calif.
    5,833
    6633 times
    All Types Of Treasure Hunting
    It was born a 6" and yes box /floats/pump etc modified. I had a 5" triple also many years ago. I've owned/operated many dozens of dredges over the past 40+ years, 2"-10". John

  13. #13

    Feb 2016
    69
    36 times
    All Types Of Treasure Hunting
    That pretty neat. I kind of figured that box could handle the flow of a 6”.

 

 

Remove Ads

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. keene and proline pump psi ??
    By diggerdoodah in forum Dredging & Hi Banking
    Replies: 14
    Last Post: Jul 26, 2018, 04:44 PM
  2. keene p-180 sap pump?
    By timberjack in forum Gold Prospecting
    Replies: 15
    Last Post: Feb 17, 2014, 07:24 PM
  3. Old Keene pump parts
    By benny in forum Dredging & Hi Banking
    Replies: 15
    Last Post: Nov 27, 2013, 07:47 AM
  4. Help Please P350L & P350S Pump
    By Gringo72 in forum Dredging & Hi Banking
    Replies: 10
    Last Post: Jan 10, 2013, 05:48 PM
  5. Pump for keene A51
    By wingmaster in forum Sluicing
    Replies: 1
    Last Post: Aug 30, 2012, 05:12 AM
Powered by vBadvanced CMPS v4.3.0