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Re: T&T: NorPro generators

From: Pascal Gademer (no email)
Date: Thu Jun 02 2005 - 14:23:52 EDT

  • Next message: Michael Redshaw: "Re: T&T: Mooring"

    i have an 18kw norpro with isuzu engine. it's about 2 1/2 year old with
    1300 hours.

    short story... i'd buy one again... good unit, terrific price.

    long story :
    - great sound shield, easy to remove, yet strong enough to step on it.
    - self bleeding after filter change, jsut turn on the key to run the fule
    pump a couple of minutes before firing up.
    - good access to all components.

    the only problems I've had with it have been caused be a lousy installation
    by the previous owner. when i got the boat, the genset was 6 months old and
    had 100 hours. it was running fine, no issues. 2 years later and 1200 hours,
    it ingested massive amount of water overfilling the crank case... it
    woudln't even shut down, i had to quickly open it up after i noticed the
    massive smnoke out of the exhaust, rip the air filter out and stuff a rag.
    the norpro mechanic said the exhaust wasn't installed correcly: hose looped
    up from the exit thru the sound shield to the muffler located 2' higher than
    the lowest point. Drained, flushed with diesel, then oil, then pulled the
    head out to fix damaged valves... reinstaled the head... then the damn thing
    re ingested water depsite the exhaust having been re located.

    this time around, I looked into it myself and realized that the exhaust
    manifold was at sea level, or jsut below, and no syphon break loop had been
    installed between the pump and manifold. Not only did the original installer
    screw up but the guy (norpro approved shop) who re did the head and exhaust
    re isntalled never checked to see if a syphon break was needed. Added one,
    flushed and re filled with clean oil, no problem since.

    the mystery was why did it take 1200 hours to ingest water? the mechanic
    couldn't believe it. reason seems that for the first 1200 hours i woiud
    alsways run the genset while running the boat. When i installed an inverter
    and started running the boat without the genset being on, rolling motion
    lead to water coming in....

    now last week end, I noticed one digital clock running a little slow while
    on genset. losing 30minutes in 24 hours. i just received a frequency meter
    (nice little gadget btw... plugs in any outlet and displays
    voltage/frequency) so I'm going to check if it puts out exactly 60hz. my
    guess is that the mechanic didn't check that it was tunring exactly 1800 rpm
    after reinstalling the head ... 3 rd mistake they made! so much for pros...

    pascal
    miami, fl
    70 hatteras 53 my

    ----- Original Message -----
    From: "R C Smith Jr" <>
    To: "T&T T&T" <>
    Sent: Wednesday, June 01, 2005 6:51 PM
    Subject: T&T: NorPro generators

    > I am thinking of replacing my antique Onans with either the Isuzu or
    Yanmar
    > versions of the NorPros, which use Marathon electric generators.
    > Unbelievable pricing is forcing me to look hard.
    >
    > Any experience from the list would be much appreciated.
    >
    > Bob
    > ________________
    > Robert Calhoun Smith Jr
    > M/V MARY KATHRYN
    > Hatteras 58 LRC
    > Annapolis
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