SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: BOOST on December 02, 2007, 07:53:46 PM

Title: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: BOOST on December 02, 2007, 07:53:46 PM: The boat was purchased last week after sitting for five years. I went through the fuel system, changed the oil, rebuilt the carb, greased, re-oiled the jet. The impellar and wear ring look great. Any suggestions on other trouble shooting options?Great deal 1000.00 not running it was the next weekend.
Title: Re: 1977 Hawaiian BBF Berkley Jet
Post by: flytime on December 02, 2007, 08:06:50 PM: Boost,

Congrats on the purchase. I would also check all the cables. Throttle, place divereter if equipped, steering cable, cable that controls the bucket on the jet. Just my .02. How about posting up some pics? ;)

Bob
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: AA/Paul on December 03, 2007, 07:19:11 AM: Congrats!!
Welcome to the board.
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: Ralph Brunt on December 03, 2007, 07:34:48 AM: i would be checking the tach, that rpm seems a bit high for the mph, what kind of pump
and welcome to scjb
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: jet boat performance on December 03, 2007, 07:45:19 AM: Quote from: Ralph Brunt on December 03, 2007, 07:34:48 AM
i would be checking the tach, that rpm seems a bit high for the mph, what kind of pump
and welcome to scjb

Welcome! This is a great place with lots of good folks Tom

Re Rpms ,Ralphs correct ,something doesn't "click" a moderate Hp motor (Olds ,Chevy, Ford) should turn an A Impeller 4400 to maybe 5100 (alot of different variables) Tom
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: 2savage4you on December 03, 2007, 10:20:29 AM: Quote from: jet boat performance on December 03, 2007, 07:45:19 AM

Re Rpms ,Ralphs correct ,something doesn't "click" a moderate Hp motor (Olds ,Chevy, Ford) should turn an A Impeller 4400 to maybe 5100 (alot of different variables) Tom

Thats good info, i didnt know that ;)

2sav
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: Legal Chemistry on December 03, 2007, 01:55:33 PM: RPMs seem very high. I have an "size large" jetboat and at 4800 I'm at 50+.

Hmmm, if your tach is set for a 6 cylinder, would that be 4650rpm for a v8? That would seem about right then.
Title: Re: 1977 Hawaiian BBF Berkley Jet
Post by: BOOST on December 03, 2007, 06:56:39 PM: Quote from: flytime on December 02, 2007, 08:06:50 PM
Boost,

Congrats on the purchase. I would also check all the cables. Throttle, place divereter if equipped, steering cable, cable that controls the bucket on the jet. Just my .02. How about posting up some pics? ;)

Bob
[/

thanks Bob I check the cables they seem to be fine,i'm looking into the tech
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: BOOST on December 03, 2007, 07:07:37 PM: Quote from: Ralph Brunt on December 03, 2007, 07:34:48 AM
i would be checking the tach, that rpm seems a bit high for the mph, what kind of pump
and welcome to scjb
[/
quote]Its got a berkly split bowl it was built by GS MARINE
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: FORKEDUP on December 04, 2007, 07:30:27 AM: congrats on the boat and welcome to the site :)
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: speedymopars on December 04, 2007, 09:56:29 PM: Did you see what impeller is on it? If it is something small (c or d) then maybe it makes sense. If it is an A or AA, you probably aren't turning that RPM so check the tach. You would have to be making over 800 HP to turn an A that high, and you would be going a whole lot faster than 54 MPH.

My A is 43 MPH at 4300 RPM for reference.
My vote is the tach is on the wrong setting and Legal C's correct....
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: Marcsrollin on December 04, 2007, 10:02:18 PM: Quote from: speedymopars on December 04, 2007, 09:56:29 PM
Did you see what impeller is on it? If it is something small (c or d) then maybe it makes sense. If it is an A or AA, you probably aren't turning that RPM so check the tach. You would have to be making over 800 HP to turn an A that high, and you would be going a whole lot faster than 54 MPH.

My A is 43 MPH at 4300 RPM for reference.
My vote is the tach is on the wrong setting and Legal C's correct....

Or the pump really needs to be rebuilt!
Title: Re: 6200rpm @ 54mph 1977 Hawaiian BBF 460 berkley jet
Post by: BOOST on December 16, 2007, 03:59:40 PM: Quote from: Marcsrollin on December 04, 2007, 10:02:18 PM
Or the pump really needs to be rebuilt!
My dad pick this boat up last month going to pick up new gauges this week i believe the tach is bad , and the rest of the gauges dont work,i'll keep you guys posted.
THANKS.