SoCal Jet Boats

Tech Talk => Jet Pumps => Topic started by: Eric M Johnson on May 06, 2012, 12:52:15 PM

Title: 1976 Tahiti with a 429 & Berkeley...
Post by: Eric M Johnson on May 06, 2012, 12:52:15 PM

Breaking in a Rebuilt engine... During break in I noticed a slow steady stream of water coming from where the drive line goes into the Berkeley pump only at RPMs over 2500 no leaking @ Idle or when sitting (the Boat sat dry for over 3yrs)...   I also noticed a random medium vibration when in forward, neutral or reverse at idle.. I replaced the U-Joint that goes directly into the pump..  FYI i am a seasoned boater, but new to the Jet World...   Any advise would be welcome....



Thanks ~E~   

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: enginedoctor on May 06, 2012, 08:52:40 PM

Hi Eric, and welcome back to SCJB!
Your best bet is to PM  Ralph  Brunt on the board for help. Jus my @2 cents

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: ka0tyk on May 06, 2012, 08:57:45 PM

what type of berk pump? some have a "packing seal" that seals the pump shaft in the suction housing. over time the seal wears and you need to snug the nuts that hold it.  after a while it just needs to be replaced.  a pic would help a LOT in this case. as far as vibration who knows, how does the impeller look?  any huge chips in it, or a rock wedged in the vanes?  id recommend not running it anymore until you get that sorted out.

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: Eric M Johnson on May 06, 2012, 10:45:43 PM

Bid D, did you notice the vibration when you were in the boat? I dont know if I am over reacting, everything runs smooth above a idol...
 

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: enginedoctor on May 07, 2012, 11:55:02 AM

Yes Eric, I felt the vibration... Let's see what other's think it maybe when they chime in. :thumbup:

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: Brad @ SCJB on May 07, 2012, 01:23:37 PM

tighten these bolts on either side of the pump 1 turn....see if that helps with the leak.

what RPM's is the vibration kicking in? only at idle? or is it when its under extreme load (ie getting on plane)

[attachimg=1]

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: Eric M Johnson on May 07, 2012, 02:29:54 PM

Only at Idol..   The Jet feels good out of the hole, I ran it up to 4500RPM (40+mph) with no problems. Ran her most of the day 20+ Gal of gas at around 3500RPM.... Everything seems smooth! I just want to make sure all is good befor I take her to Parker...

Thanks
~E~

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: enginedoctor on May 07, 2012, 07:46:25 PM

Eric... remove the drive line,  and start her up to see if the vibration goes away Sir. :thumbup:

Title: Re: 1976 Tahiti with a 429 & Berkeley...
Post by: Eric M Johnson on May 07, 2012, 08:20:48 PM

Thanks David I will try that! I dont remember any vibration when I ran it in the driveway...