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RE: onan bge series genset has no starting power
The 'Tech' should remove and test the starter. If it works on the bench, the problem could have been the starter mount bolts. They are steel and the housings they clamp together are aluminum. Over the years the dielectric currents between the two metals could have set up a high resistance path that prevents starter current from getting back to the battery. Clean the mating surfaces before installing the starter.
If the stater still won't work upon re-installation, then check for a high resistance in the solenoid or the cables feeding the starter and battery.
JimL
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Generator Jim
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07/18/08 05:14pm |
Tech Issues
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RE: onan microlite 4000
Pamtnmn
The brushes and slip rings on a KY series generator are under the flywheel that has to be pulled off with a gear puller to get at them. They must be cleaned by hand, not with the engine running.
JimL
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Generator Jim
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07/13/08 01:13pm |
Tech Issues
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RE: Generator problems - need help
There should be a lever or a knurled knob on the side of the carb between the air filter housing and the carb. It is the end of the choke shaft. Wiggle it back and forth and see if it is gummed up. If so, WD40 will break it loose. Also check the linkage on the back side of the carb for freedom of motion.
JimL
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Generator Jim
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07/08/08 10:46am |
Tech Issues
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RE: Generator problems - need help
Have you checked the points?? They are at the top center of the genset under the aluminum cover with the spring clamp on it. The point gap should be .016 on your unit. You might consider changing both the points and the condenser that are under the cover.
To set the points, rotate the engine until the points are at their maximum open position. If the points are loose on their bracket, a 7/32 Allen wrench will tighten the two mounting bolts up. Not TOO tight or you will squeeze out the old paper gasket under the point bracket. After insuring that the point surfaces are reasonably flat, set the gap as follows. Using a thickness gage and a 5/32 Allen wrench, adjust the stationary point until you feel a slight drag on the thickness wrench. Reinstall the cover and the spring wire clamp. Bow three times towards Fridley, Minnesota (ONAN factory) and hit the start button.
A good heavy shot of carburetor cleaner in the gasoline will help take care of any varnish that may have formed on the inside of the bowl.
JimL
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Generator Jim
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07/08/08 07:58am |
Tech Issues
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RE: No Power to Onan
The generator starter requires 12 vdc power to operate. Shore power and your converter cannot supply enough dc power to get it running. How about checking for loose, corroded or incorrect connections.
Don't forget the ground path return to the battery. The power has to get back to the battery to complete the circuit.
Turn on a dc light and try to start the generator. Did the light go out? If so, you have a low battery and/or a high resistance connection.
JimL
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Generator Jim
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06/18/08 08:52am |
Tech Issues
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RE: No Power to Onan
How about another battery serving just the camper systems that is dead or needing a charge?
JimL
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Generator Jim
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06/17/08 12:17pm |
Tech Issues
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RE: Onan Generator - Running Question
Billy
We would love to give you the parameters you asked for but it is difficult because you did not post the COMPLETE model number. ONAN made spec letters A thru M (I think) of the NHE. There are at least three different stators and two different rotors in that pile. Which one is yours??
JimL
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Generator Jim
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05/09/08 06:47am |
Tech Issues
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RE: Quirk with Generac 5.5 Genset
If the unit cranks at or near normal speed, the battery is OK and probably not a factor in the "no initial voltage buildup" problem.
JimL
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Generator Jim
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05/08/08 06:35am |
Tech Issues
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RE: Quirk with Generac 5.5 Genset
It sounds like the field flash circuit is not working or the brushes and slip rings are dirty and restricting the field flash current to the rotor.
JimL
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Generator Jim
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05/07/08 03:28pm |
Tech Issues
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RE: Onan Microquiet 4000 Won't Start
A Micro Quiet 4000 only has one spark plug.
The oil level switch is only low, not high/low.
ONAN did away with the level switch on the later models and published a PSB (Product Support Bulletin) to unplug the switch on the earlier models. Just check the oil before each use until you have an idea of the oil consumption, if any.
JimL
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Generator Jim
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05/07/08 03:13pm |
Tech Issues
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RE: Getting Onan to run
Your starter drive or starter is possibly going bad. Alternatively, your generator starting battery is low or has bad connections.
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Generator Jim
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05/01/08 08:18pm |
Tech Issues
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RE: Onan 6.5 Generator problems
Main jet/altitude adjuster 1 1/2 turns open from GENTLY closed
Idle jet 1 1/2 turns open or blocked on later models
Idle speed adjusting screw/bolt Set at 55 Hz or 100 volts.
JimL
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Generator Jim
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04/30/08 02:07pm |
Tech Issues
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RE: Onan Generator Problem/Question
Billbounder
Most RV genset fuel installations contain two flex hoses in them. One at the top of the tank that may or may not have a 90 degree bend in it and one coming into the generator compartment and going to the fuel pump.
Yes the tank probably has to come out. Run the coach until the tank is down to less than 1/4 then pull the tank and change the line along with any other flex line up there. Use high quality silicone hose for replacement.
As an alternative. I had some enterprising Canadians come into the shop a few years ago and they had a super fix for the same problem. The tank on their coach was in the back of the frame and under the bed. They CAREFULLY measured and cut a hole in the floor under the bed and used it as an access hole to repair all the hoses in the area.
I had two problems with their fix:
1. It took business away from my shop after I had bought two special tank jacks.
2. It was logical and I didn't think of it first.
If you want to use their fix. Measure at least three times, get someone else to measure. Have a third person do the cutting (someone else to blame).
JimL
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Generator Jim
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04/20/08 04:07pm |
Tech Issues
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RE: Onan Generator Problem/Question
The "altitude switch" is actually a plastic knob on the main jet on the carb bowl. It is 'calibrated' by the marks molded into it at the factory. The knob has built-in stops that prevent it from going more than 3/4 turn. Removing the knob will void the gensets' California Air Research Board warranty on air pollution.
JimL
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Generator Jim
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04/16/08 02:25pm |
Tech Issues
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RE: Onan Circuit Breaker Tripping
Terry
Thanks for posting the fix. That is one of the primary purposes of this forum. Sorry, I forgot about the Torx screws.
JimL
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Generator Jim
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04/16/08 01:42pm |
Tech Issues
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RE: Onan Sticky Governor Linkage
Try setting the choke a little richer or open the main jet about 1/4 turn and see what happens.
Look down the governor rod as it goes under the black heat cover and see if it isn't binding on the cover.
JimL
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Generator Jim
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04/15/08 06:59am |
Tech Issues
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RE: Onan 6.5 NHE
Metal
Your Sept 87 unit seems to have a governor problem. It could be attributed to one or more problems.
1. Basic governor setting is too high.
2. Too much sensitivity in the governor linkage.
3. Binding governor rod that won't allow the governor to bring the unit back to the on-speed setting.
4. Very dirty/varnished oil that is gumming up the governor dish and ball assembly mounted on the front of the camshaft.
5. Maladjusted engine idle speed setting.
To check the speed, get a multimeter that has a Hz function on it and connect it between generator ground and one of the circuit breaker outputs. At no load the meter should read 61.5 +- .5, at full load it should read 58.5 +- .5 Hz.
To adjust the speed setting loosen and adjust on the two (3/8" wrench) lock nuts and threaded shaft inside the square hole in the black top cover on the engine. Use WD40 on the shaft and nuts as this is an old unit and it may be rusty.
The voltage adjusting system was usually set slightly low at the factory due to a possible overspeed voltage problem. Do NOT adjust the transformer taps unless you have the Service/Overhaul Manual and fully understand it.
JimL
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Generator Jim
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04/14/08 04:29pm |
Tech Issues
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RE: Onan 6.5 NHE
Metal
Post the complete model number and we can help much more. It sounds like a speed problem but it could be a blown diode in an early spec, or a shorted regulator in a later spec. There is also the possibility of a rotor or stator problem.
The model and spec number will tell the tale.
JimL
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Generator Jim
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04/14/08 07:10am |
Tech Issues
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RE: Onan Circuit Breaker Tripping
My Spec K model uses the same beaker but mounted in a different place. It is held in with two small capscrews and has two spade connectors on the back side. The plastic gas drip 'tray' on top of the assembly should come off with a couple of screws. The back of the 'tray' goes down a couple of inches as insulation against wires shorting against the generator housing.
DISCONNECT THE BATTERY FIRST!
JimL
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Generator Jim
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04/10/08 03:05pm |
Tech Issues
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RE: Onan Circuit Breaker Tripping
Terry
It's probably a bad breaker but -- disconnect the output leads from any load and tape them up (separately). Try another test and record the voltage coming out of the unit. If OK, then order Breaker, Circuit, CB1, ONAN part number 0320-1323 and that should fix it.
Good luck with the troubleshooting
JimL
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Generator Jim
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04/09/08 08:32pm |
Tech Issues
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