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Old 08-06-2005, 12:13 PM   #15
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Short out the low oil switch and run the gen so you can eleminate that as a problem.

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Old 08-06-2005, 02:46 PM   #16
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swebster-----here's a thought that will only take a minute to check. As george mentioned the point type ignition uses a resister to lower voltage to the points to keep them from burning up. While the engine is being cranked 12 volts is applied directly to the points and ignition system providing a higher voltage to the coil and thus higher voltage to the spark plug during cranking for starting purposes . When the engine starts and the start switch is released the ignition current is directed through a resistance unit to reduce the voltage and extend point life. That said it is possable to have a fouled or partially fouled spark plug that will fire when in the crank position and has the higher voltage applied then when the switch is released and the lower voltage is applied there may not be sufficient voltage to fire the plug. Just a thought but sometimes the simplest things are over looked.-----Pieman

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Old 08-06-2005, 03:00 PM   #17
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swebster----as to "shorting out the oil presure switch". To properly by-pass that switch you must determine if it is a normally open or normally closed switch. As rule of thumb a switch with a single wire is normally closed and one with 2 wires normally open. I both cases these switches a generally by passed during cranking and then become functional when the ignition in in the run position thus it would exhibit the condition you describe if it is defective. To test a normally closed switch <one wire> just unplug the the single wire from the switch and try it. To by pass a normally open switch < two wire> unplug the switch and jumper across the wire end connector and try it. Sometimes locating the switch is the hardest part of this job.
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Old 08-12-2005, 12:52 PM   #18
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1986 34.5' Airstream 345
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Thanks....this was an old post. It turned out to be my Oil Pressure switch. Replaced it and the GenSet has been purring for almost two years now.

Also, noticed at the same time some chaffed wires in the control box which I'm sure caused the original R1 burnout.

Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
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