[Question] berkley pump question
+ Reply to Thread
Results 1 to 13 of 13

Thread:
berkley pump question

  1. #1
    Senior Member liquid addiction's Avatar
    Join Date
    Jun 2008
    Posts
    972

    Default berkley pump question

    I bought a 78 DiMarco Day Crusier has a 460 Ford with a Berkley pump. First jet boat for me.

    My question is, when i went to pick this boat up the seller had it running on the trailer with water hooked up to the motor. So I end up getting up inside the boat after hearing it run and shut the motor off. The sellers reply was "it is OK if it runs as long as there is water connected to the motor". I have a v-drive and understand that running water through the motor is needed to keeping it cool, but does running it out of water damage the pump? I would think it is not good for it. My other concern would be that if the seller thinks it is OK, then how many times have he done this. I have ran the boat a few times and it seems like its running good, but like I said, its my first jet.

    Thanks

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Dec 2017
    Location
    Texas Hill Country
    Posts
    112

    Default

    Water should be flowed thru the pump also. Just zip tie the end of a hose to the grate pointed at the impeller. Very common practice.

  4. #3
    Senior Member TexasJet's Avatar
    Join Date
    Dec 2007
    Location
    College Station, Texas
    Posts
    463

    Default

    Quote Originally Posted by Old Man Joe View Post
    Water should be flowed thru the pump also. Just zip tie the end of a hose to the grate pointed at the impeller. Very common practice.
    Does this keep the packing in the front of the pump cool? If not it may glaze the packing and cause a leak.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member
    Join Date
    Dec 2017
    Location
    Texas Hill Country
    Posts
    112

    Default

    We used this practice when servicing boats at my son's boat shop. Mainly it just sort of duplicates what the pump does in the water, but the real advantage was the the water lubrication of the rear shaft bearing, because the grease in that bearing gets washed out very quickly when the pump is in use. The grease in the front bearing eventually creeps out to the packing area and keeps the packing soft.

    If you can gain access to old Berkeley repair/maintenance catalogs, you will see these recommendations.

  7. #5
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,811

    Default

    My opinion! Jet pumps are meant to run in the water and water is the coolant of said pump. Berkeley will tell you that "DO NOT RUN THE PUMP DRY FOR EXTENDED AMOUNTS OF TIME" 30 seconds for pre check and get in the water. Or disconnect pump from engine and run with water to the engine as long as you want. FWIW you are correct in questioning how many times and for how long? It's like any other water pump that runs with out water. Deduct 2k from the price(at least) to repair the damage to the pump! M

  8. #6
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,811

    Default

    Quote Originally Posted by Old Man Joe View Post
    We used this practice when servicing boats at my son's boat shop. Mainly it just sort of duplicates what the pump does in the water, but the real advantage was the the water lubrication of the rear shaft bearing, because the grease in that bearing gets washed out very quickly when the pump is in use. The grease in the front bearing eventually creeps out to the packing area and keeps the packing soft.

    If you can gain access to old Berkeley repair/maintenance catalogs, you will see these recommendations.
    There is more to it than that, the impeller to wear ring clearance gets compromised. M

  9. #7
    Senior Member
    Join Date
    Feb 2015
    Location
    619
    Posts
    595

    Default

    Quote Originally Posted by ol guy View Post
    There is more to it than that, the impeller to wear ring clearance gets compromised. M
    Colorado River water with all that silt in it doesn't help either,,,Liquid sand paper.
    Slinging Lead on and off the water for over 40 YRS

    82 18' Crusader Tunnel SOLD ,
    00 23' Mako 232 fish killer,SOLD
    78 19' Eliminator Daytona SOLD
    16 19' Predator/Cheyenne

  10. #8
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,811

    Default

    Quote Originally Posted by leadslinger View Post
    Colorado River water with all that silt in it doesn't help either,,,Liquid sand paper.
    Most shallow water has the same effect. Alot of people don't realize that an efficient pump will suck water (even at idle) will suck water 3-4 feet down from the bottom. If you don't believe me put your;e foot under the boat while running and find out for your;e self! or walk out in the water when the boat leaves and feel the hole the bottom !!

  11. #9
    Senior Member
    Join Date
    Feb 2015
    Location
    619
    Posts
    595

    Default

    Quote Originally Posted by ol guy View Post
    Most shallow water has the same effect. Alot of people don't realize that an efficient pump will suck water (even at idle) will suck water 3-4 feet down from the bottom. If you don't believe me put your;e foot under the boat while running and find out for your;e self! or walk out in the water when the boat leaves and feel the hole the bottom !!
    Seen that before,,,,
    Slinging Lead on and off the water for over 40 YRS

    82 18' Crusader Tunnel SOLD ,
    00 23' Mako 232 fish killer,SOLD
    78 19' Eliminator Daytona SOLD
    16 19' Predator/Cheyenne

  12. #10
    Senior Member bp298's Avatar
    Join Date
    Dec 2007
    Location
    LHC
    Posts
    6,570

    Default

    ralph, the impeller/wear ring clearance should be fairly tight (.020-.025). running the boat on the trailer with the jet engaged can result in heating the thing up, affecting those clearances. the clearances are important from an efficiency standpoint. boat will still run, but the drive isn't as good as it should be. also, when towing down the road, a lot of dirt ends up finding it's way up into the suction piece if there's no cover placed over the suction. some guys would stick towels up there and then forget they did it, lol. it's best to back it into the water, pull it up, back it down again just to try and flush the crap out before starting.
    for some of us, there is a lot of time and effort (money spent) to make sure that pump shaft is perfectly straight in the suction piece to bowl, and that the shaft (impeller) is perfectly centered in the pump, relative to the suction piece/bowl. a good pump that's well maintained, and well taken care of can last decades. running the pump dry on the trailer can negatively affect that...

  13. #11
    Junior Member
    Join Date
    Aug 2018
    Posts
    4

    Default jet out of water

    A typical berkley pump, ski boat impeller wear ring set up, wont hurt it to run for a short time, meaning oil in the bowl and a greased font bearing,if it were a race clearance , meaning 15 thou, impeller, wear ring set up, absolutely not ,sand, dirt ect. not good,most lake ski boats have a fair amount of clearance so the average boater that forgets to push off far enough wont destroy the pump, they are right the pump will suck dirt,rocks silt ect. from 3-4 feet from bottom, your best bet if you want to start on trailer is to cut the end off a rubber hose and wedge it in the rock grate to make sure theirs no dirt between the ring and the impeller, just make sure the bowl has oil and the front bearing has grease, just 2-3 pumps with a grease gun, more than that and it just makes a mess, if you have any questions just call berkley , theyll be more than happy to help, just my 2cents.

  14. #12
    Senior Member liquid addiction's Avatar
    Join Date
    Jun 2008
    Posts
    972

    Default

    I'm not trying to sound stupid, but what do you mean by "oil in the bowl"? I found and greased the zirk for the bearing in the front, but did not know there is supposed to be oil in the bowl.

    Thank you Bob and everyone else that is giving me insight to the jet boat world.

    Quote Originally Posted by 76tahiticruiser View Post
    A typical berkley pump, ski boat impeller wear ring set up, wont hurt it to run for a short time, meaning oil in the bowl and a greased font bearing,if it were a race clearance , meaning 15 thou, impeller, wear ring set up, absolutely not ,sand, dirt ect. not good,most lake ski boats have a fair amount of clearance so the average boater that forgets to push off far enough wont destroy the pump, they are right the pump will suck dirt,rocks silt ect. from 3-4 feet from bottom, your best bet if you want to start on trailer is to cut the end off a rubber hose and wedge it in the rock grate to make sure theirs no dirt between the ring and the impeller, just make sure the bowl has oil and the front bearing has grease, just 2-3 pumps with a grease gun, more than that and it just makes a mess, if you have any questions just call berkley , theyll be more than happy to help, just my 2cents.
    Last edited by liquid addiction; 09-22-2018 at 11:58 AM.

  15. #13
    Senior Member bp298's Avatar
    Join Date
    Dec 2007
    Location
    LHC
    Posts
    6,570

    Default

    Quote Originally Posted by liquid addiction View Post
    I'm not trying to sound stupid, but what do you mean by "oil in the bowl"? I found and greased the zirk for the bearing in the front, but did not know there is supposed to be oil in the bowl.

    Thank you Bob and everyone else that is giving me insight to the jet boat world.
    Ralph, the tail end of the impeller shaft sits in a bushing type bearing at the back end of the bowl. there is an oil bath surrounding it. there should be two 1/8 plugs on each side of the bowl, to add oil. remove both plugs, fill the right side until oil comes out of the left side, to keep the oil bath full. one caveat to that was some would fill the oil bath with grease for lube of the bearing, or 90 weight. so if it's full of grease, oil isn't going to go into it. there's also a seal to keep the oil from leaking out, unless the seal is damaged. I use 30wt...
    with some pumps, that rear bearing is water cooled. with a standard Berkeley, if there are two plugs, it's oil of some weight or grease.

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in


Tags for this Thread

Digg This Thread

Posting Permissions

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95