Another note from my experience. Our emergency generators at work startup
and go to a full load in ten seconds. We have two, one is natural gas(305
Chevy) and the other is diesel. I have the pm on the gas unit and it runs
weekly for 6 minutes and when we have emergencies. No problem with gas or
diesel, but then they don't run like the lighthouse units.

Van...
  -----Original Message-----
  From: owner-baba-l@ballreich.net [mailto:owner-baba-l@ballreich.net]On
Behalf Of Tom Beard
  Sent: Sunday, January 22, 2006 7:22 PM
  To: baba-l@ballreich.net
  Subject: RE: [Baba-L] Diesel generator II


  “I am impressed with the durability of the lighthouse generators, but a
little back-of-the-envelope arithmatic reveals that over the 18,000 hours
each engine ran, for a month at a time (about 720 hours), each engine was
only started and stopped twenty four times before overhaul...”



  Good point! I think I have to correct myself—as I recall a little better,
the total hours between overhauls was 20,000. But that adds only a couple
more engine starts. It is the start-cycling plus varying loads and rpms
(starting and shutting down—frequently without sufficient warm-up time— that
takes it toll on our boats’ engines). I would guess these lighthouse engines
had three to four times the start cycles than calculated here due to testing
during our routine inspection visits. I do not know how many times the
engines were overhauled, but they had a remarkable usage record. They were,
however, run under ideal conditions with a near constant load at a
continuous 1800 rpm. I remember once we had the unusual situation of having
to pull one engine at 14,000 hours due to excessive ring blow-by.



  Tom

  MOONSHADOW





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Received on Mon Jan 23 08:41:19 2006