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Old 11-14-2006, 05:29 AM   #1
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1982 31' Airstream310
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Surging Generator

I went to look at a 1982 310 last week, the unit on a whole was very nice. While testing the a/c units I noticed the generator seemed to surge while running, and the a/c units followed. Both units were on at the time. Was the load to high? The gen is an Onan 6.5k. Is this a normal occurance or should I be worried.



Thanks Joy & Mark
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Old 11-14-2006, 05:54 AM   #2
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6.5 should be anough to run both A/C's, although if they both start at the same time the startup surge will be very close to the genset's capacity. Sounds like the carb needs adjustment.
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Old 11-14-2006, 06:28 AM   #3
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Joy / Mark, had the unit been sitting for a while? Does the fuel pull from the same line as the engine?
I just got mine back from a major service including a new starter and couldn't get it to suck up enough fuel to run for more than a minute. As I'm on the same line as the engine I just cranked up the motor and ran it for a minute to pull fuel into the line. The rig had not been run for over a week....
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Old 11-14-2006, 06:44 AM   #4
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I'm with Terry - carb adjustment. They will "hunt" or "surge" when the load exceeds the current output then drop when it revs up...the idea is for the engine to put out as much as is being called (does that make any sense at all?) It's likely you'll need some basic service on the generator but it's good that it runs.

One note, don't run the ACs with the generator surging. It can vary the voltage/amps dramatically and damage the internals of the AC units.
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Old 11-14-2006, 09:38 AM   #5
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My 6.5 Onan had a bad case of the surgies---The cure was new plugs, points and condenser and then a slight adjustment of the carb. main jet.

Carefully set the point gap per your manual---If the point gap is set correctly, then the timing is also set correctly. In other words the point gap sets the timing (this is a critical adjustment).

Mine runs happily now.------Bob
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Old 11-14-2006, 11:07 AM   #6
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Quote:
Originally Posted by wascobob
My 6.5 Onan had a bad case of the surgies---The cure was new plugs, points and condenser and then a slight adjustment of the carb. main jet.

Carefully set the point gap per your manual---If the point gap is set correctly, then the timing is also set correctly. In other words the point gap sets the timing (this is a critical adjustment).

Mine runs happily now.------Bob
These are all good points. Not as common, but the governor may be out of adjustment as well, sometimes from worn linkage, sometimes other issues.
Bottom line, it should be fixable without too much $$, you'll need to get it to a shop.
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Old 11-14-2006, 03:08 PM   #7
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1982 31' Airstream310
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Thanks to all for responding, this issue was one of the hurdles before we decide on this 310, We flew to Texas to look this one over last weekend. Did not find any major problems, everything seems to work fine, We did find some minor finish issues hopefully this can be cured with a good wax and buff (should I be concerned about this? it is an 1982), all accesories are there including the blender and kinfe sharpener. If we can just make up our minds I will propably fly back over Thanksgiving weekend and drive home. You all have been a great source of info.



Thanks Again

Joy & Mark
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Old 11-14-2006, 07:18 PM   #8
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Sounds like a great machine. I look forward to seeing some pictures.
Rob
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