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[GMCnet] The genset boogie [message #145181] Sat, 01 October 2011 18:32 Go to previous message
jhbridges is currently offline  jhbridges   United States
Messages: 8412
Registered: May 2011
Location: Braselton ga
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Senior Member
My 23 footer has a Junkerac 3.6KW variable speed genset which was installed some years back.  It has been doing OK other than the float will stick shut on occasion and need a bit of tapping if it's been sitting a couple of weeks.  Now, however, it has a problem.  Press the start switch, the cooling fan engages and stays that way until you stop it, and the Run light stays lit.  But, fire it off, and when you release the start switch the run light goes out and it stops.  If I'm reading the (rather limited) schematic correctly, this is an indication of either a failed oil pressure switch or a failed temp limit switch.  I'm betting oil pressure switch beacuse low pressure switches of this type are notoriously unreliable, and temp limit switches seldom give trouble at all (I support a fair number of both).  Tomorrow I shall bypass each in turn and see what happens.  I'll simply put a guage on the oil port, and assuming it holds some pressure hot,
we'll live without the switch.  I suspect it will make an interesting noise if it runs out of oil pressure and self - destructs... and this would give me an excuse to do the Henderson Thing with the contractor genset.
Meantime, I took a gas can out to the parts coach  and ran a line to the 6KWOnan pump and stuffed a hot battery in the bay and spun it over.  It blew a wad of soot and rust out the pipe, and then settled down to a happy  Onan 1800 purrr..  I didn't load it, but I've no reason to think it won't run just fine.  I wish it would fit in the shorter coach.
 
--johnny
'76 Norris 23  upfit
'76 Palm Beach
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell
 
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