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Onan Generators

2.5 LK battery charging problem

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Old 11-24-2007, 12:52:00 PM
Jim Kinler Jim Kinler is offline
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Default 2.5 LK battery charging problem

i have an old 2.5 lk 1r/10545j (ser.#0273592144) that i decided to finally decided to work on. the 12 volt charging circuit doesnt seem to be working. the gen. wont run without the batt. connected. i did remove the electric choke when i replaced the carb. with a manual choke one. the batt. voltage is about 12.6 before i start it, then 12.3 after. i connected a 1.5 amp. batt. maintainer up to the 120 volt outlet that will keep the voltage 12.7 while running, voltage should climb higher their must be a 12 volt draw. i would like to repair if possible. will this batt. maintainer damage anything hooked up?
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Old 11-24-2007, 02:29:01 PM
Jim Rankin Jim Rankin is offline
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Default Re: 2.5 lk batt. charging problem

The charging system should also feed the regulator/field. That should be the draw while running.

Are the brushes free on the commutator, commutator clean etc?

You might have to go to a little higher amperage charger to get to around 14 volts under load, unless you haven't let it run long enough to catch up on charging the battery.
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Old 11-24-2007, 03:40:37 PM
Jim Kinler Jim Kinler is offline
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Default Re: 2.5 lk batt. charging problem

ill check the brushes. the electric start works fine. i thought it might be a reley or maybe with the electric choke removed it wasnt dragging the batt. down enogh to alow the dc charging to kick in . i have onley let it run a short time, but it seemed that the dc voltage stablized about 12.7 with the maintainer connected . now i did adjust the governor it was surging. set the ac voltage at 126 no load.
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