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Btcampbell

  • Karma: +0/-0
Berkeley ig pump
« on: April 26, 2021, 03:47:36 am »
What do y’all think is the problem? If I stomp on it from a stop it feels like pump slips, almost like a clutch slipping in a car????? Sometimes when idling it makes a rattling noise.
« Last Edit: April 26, 2021, 03:51:05 am by Btcampbell »
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Flusher

  • Karma: +84/-0
Re: Berkeley ig pump
« Reply #1 on: April 26, 2021, 08:55:29 am »
Take it this is a new issue?  Could elaborate on the boat, engine, maintenance, etc?  Do you regularly drive it on/off the beach?  Have you ingested any debris, including rocks?  How often do you grease the thrust bearing and fill the bowl with oil?

My guess it hasn't been maintained and the bearings are dying and maybe taking the impeller with them.
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"I want to roll with my brother Joe" - Joe Bateman - January 29, 1950 ~ November 27, 2013

Btcampbell

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Re: Berkeley ig pump
« Reply #2 on: April 26, 2021, 09:53:46 am »
I just got it as a hull in September (mantra tunnel), just got a motor in it (496 bbc), wiring, etc. well you probably know what I’m talking about. I’ve only had it out twice. I did hit the grease fitting about 4 pumps and topped
Off bowl with marine grease
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Btcampbell

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Re: Berkeley ig pump
« Reply #3 on: April 26, 2021, 11:05:51 am »
If I’m moving and hit it,seems to do fine. Also noticed at idle there is no pressure showing on my gauge the goes up to about 20 or 30 when I accelerate
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Flusher

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Re: Berkeley ig pump
« Reply #4 on: April 26, 2021, 11:48:27 am »
If I’m moving and hit it,seems to do fine. Also noticed at idle there is no pressure showing on my gauge the goes up to about 20 or 30 when I accelerate
Gauge on the pump?  Suction, intake, or bowl?
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"I want to roll with my brother Joe" - Joe Bateman - January 29, 1950 ~ November 27, 2013

Flusher

  • Karma: +84/-0
Re: Berkeley ig pump
« Reply #5 on: April 26, 2021, 12:40:13 pm »
I just got it as a hull in September (mantra tunnel), just got a motor in it (496 bbc), wiring, etc. well you probably know what I’m talking about. I’ve only had it out twice. I did hit the grease fitting about 4 pumps and topped
Off bowl with marine grease
My guess is that the pump has been neglected and is tired now.

It should be easy enough to pull your bowl for inspection.

I would recommend, on an oil lube bowl (Berkeley or Legend), stick with 90W gear oil unless a repair sleeve has been installed.  Grease, in an oil lubricating bowl, will warm up and run to the bottom of the oil reservoir, causing the bushings to run dry.  Grease works fine in a grease lubricating bowl (Dominator or Aggressor), because there is nowhere for the grease to go.
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Flusher

  • Karma: +84/-0
Re: Berkeley ig pump
« Reply #6 on: April 26, 2021, 02:14:35 pm »
I'm assuming your 496 is pretty stout.  What impeller do you have? 

Do you have a loader?  Inducer?

Next thing I would look at is air leaks in the suction.  It is possible to pull air through the packings and around the hand hole cover.

I would also look at how the intake is set as well as the finishing work to seamlessly blend the aluminum intake with the hull.

Seems like you have already put a lot of love into your boat.  Check everything so that it is the best that it can be, then it will run its best.
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"I want to roll with my brother Joe" - Joe Bateman - January 29, 1950 ~ November 27, 2013

Btcampbell

  • Karma: +0/-0
Re: Berkeley ig pump
« Reply #7 on: April 26, 2021, 04:31:04 pm »
Gauge on intake manifold. Thanks Flusher, yea your probably right just tired.
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Flusher

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Re: Berkeley ig pump
« Reply #8 on: April 26, 2021, 05:03:48 pm »
Gauge on intake manifold. Thanks Flusher, yea your probably right just tired.
Water pressure gauge for block cooling?
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"I want to roll with my brother Joe" - Joe Bateman - January 29, 1950 ~ November 27, 2013

Btcampbell

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Re: Berkeley ig pump
« Reply #9 on: April 26, 2021, 05:55:04 pm »
Yes for the block cooling. I was told it is a stainless impeller
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Btcampbell

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Re: Berkeley ig pump
« Reply #10 on: April 26, 2021, 06:14:33 pm »
I don’t know about loader or inducer
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sgriffin

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Re: Berkeley ig pump
« Reply #11 on: April 26, 2021, 07:20:25 pm »
I had the same problem identical to what you are describing tried shaft/bowl bearings went out and with new motor. I would run through the pump for sure

Sent from my SM-G781U using SoCal Jet Boats mobile app

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Btcampbell

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Re: Berkeley ig pump
« Reply #12 on: April 27, 2021, 03:58:06 am »
Dang sgriffin!  So today I checked the bowl grease,(90wt) and it seems low or empty. Only been out twice on 30 or 45 min runs. I filled it back up and it didnt take very much. How much does it take to fill when empty. Sorry for all the questions.
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Flusher

  • Karma: +84/-0
Re: Berkeley ig pump
« Reply #13 on: April 27, 2021, 09:07:27 am »
I had the same problem identical to what you are describing tried shaft/bowl bearings went out and with new motor. I would run through the pump for sure

Sent from my SM-G781U using SoCal Jet Boats mobile app
Please check your engine oil for metal particulates.  Wouldn't be a bad idea to to cut open your oil filter for inspection.

When the shaft twists like that, everything lines up to push on your engine thrust bearing.  I would hate to see damage to your engine that could be preventable.
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Flusher

  • Karma: +84/-0
Re: Berkeley ig pump
« Reply #14 on: April 27, 2021, 09:15:15 am »
Dang sgriffin!  So today I checked the bowl grease,(90wt) and it seems low or empty. Only been out twice on 30 or 45 min runs. I filled it back up and it didnt take very much. How much does it take to fill when empty. Sorry for all the questions.
It doesn't take much, maybe half quart when empty.  However it really seems like a lot when you pull the bowl and it spills.  Honestly, I never paid attention to how much I used, I just fill it until all the air (or milkshake water) bleeds out of the 2nd pipe plug.
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"I want to roll with my brother Joe" - Joe Bateman - January 29, 1950 ~ November 27, 2013

Btcampbell

  • Karma: +0/-0
Re: Berkeley ig pump
« Reply #15 on: April 27, 2021, 10:06:07 am »
Will do. Reckon a bowl inspection is in order. Thanks for the info. This is my first jet boat as you can tell, lot of things to learn. 
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sgriffin

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Re: Berkeley ig pump
« Reply #16 on: April 27, 2021, 03:28:09 pm »
Yeah I diffently took the time to run through the hole check list cut filter every time. Motor comes out every season and run my own check up

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