ONAN 6KW Starting Problem

robert shimanek

New member
Apr 1, 1998
77
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Acuating the rocker switch at the Generator Control Panel or remote
swich inside the coach

Problem is as follows:

1. Pust to start switch, engine tries to fire (like on one cylinder) and
starter drops out immediately. This continues to repeat the cycle until
you release the switch.

2, Jumped terminals 9 & 11 on generator terminal board and engine ran
normally indicating K2 relay contacts are defective.

3. Checked K2 relay operation on the bench by applying 12 volts to relay
coil. Relay operated normally. Checked the contacts for continuity which
were OK no resistance.

4. Also checked K2 relay operation and continuity which were also OK.

5. Checked for operation fuel pump, electric choke, and fuel solenoid
which were OK.

6. Needed points, condensor, plug wires and plugs so I changed them even
though the engine ran when terminals 9 & ll were jumped.

7. Connected wire from battery ground to starter solenoid. Engine started
and operated normally. Noted that the K2 & K3 relays operated normally.

8. Checked Alternator DC voltage output which was 14.1 to 14.2 which would
cause K2 to operate and keep K3 relay closed for continued engine operation.

9. Checked the generator board for PC board cracks and continuity along
with the wiring on the board.

10. I hate to replace the board for $120.00 if I am missing something.

11. Little background that I had last weekend. Before I left my home I
checked the generator for operation being that the coach is stored inside
for the winter months. Engine and generator operated normally.

12. I traveled approximately 350 miles to my destination in lower
Michigan. When I went to start the generator from the remote switch in the
coach--the unit would not start
I pulled the generator out and it started from the generator
panel & ran normally after a couple of attempts. This happed once before a
couple of years ago.

13. I kept the unit operating for approximately 4 hours with the top
airconditioner operating. (98 degrees outside)

14. When I left the parking lot I had my wife shut down the unit from the
remote switch. She said all indications on the panel after holding down
the switch in the stop position that the unit was shut down. She has
accomplished this task many times with no previous problems.

15. However when I arrived at the camp site I noticed the generator was
operating again so she shut it down again as before.

16. Now during the night 2:30AM a loud banging was coming from under the
rear of the coach near the generator (That was a quick wakeup). To my
amaze the generator was trying to start itself. So I immediately hit the
remote stop switch in the coach and the unit stopped trying to start.

17. Looking for suggestions from the experts to correct this problem.
Maybe the problem is in front of me and I can't see.

Will appreciate your help

Bob
 
Bob,

I am impressed that you followed such a logical testing procedure, most
people would stop and fork out the bucks for the board without further
investigation. In this situation, with the unit starting OK from the
side, it looks like the PC board may be working. If you have no
operation on the remote, the chassis ground to generator, wires to the
remote, or the molex connector may have problems. I would run a 4 ga.
wire to ground then to the generator block first. Then check continuety
of each wire to the remote circuit.

Let me know what fixes it.

>
> Acuating the rocker switch at the Generator Control Panel or remote
> swich inside the coach
>
> Problem is as follows:
>
> 1. Pust to start switch, engine tries to fire (like on one cylinder) and
> starter drops out immediately. This continues to repeat the cycle until
> you release the switch.
>
> 2, Jumped terminals 9 & 11 on generator terminal board and engine ran
> normally indicating K2 relay contacts are defective.
>
> 3. Checked K2 relay operation on the bench by applying 12 volts to relay
> coil. Relay operated normally. Checked the contacts for continuity which
> were OK no resistance.
>
> 4. Also checked K2 relay operation and continuity which were also OK.
>
> 5. Checked for operation fuel pump, electric choke, and fuel solenoid
> which were OK.
>
> 6. Needed points, condensor, plug wires and plugs so I changed them even
> though the engine ran when terminals 9 & ll were jumped.
>
> 7. Connected wire from battery ground to starter solenoid. Engine started
> and operated normally. Noted that the K2 & K3 relays operated normally.
>
> 8. Checked Alternator DC voltage output which was 14.1 to 14.2 which would
> cause K2 to operate and keep K3 relay closed for continued engine operation.
>
> 9. Checked the generator board for PC board cracks and continuity along
> with the wiring on the board.
>
> 10. I hate to replace the board for $120.00 if I am missing something.
>
> 11. Little background that I had last weekend. Before I left my home I
> checked the generator for operation being that the coach is stored inside
> for the winter months. Engine and generator operated normally.
>
> 12. I traveled approximately 350 miles to my destination in lower
> Michigan. When I went to start the generator from the remote switch in the
> coach--the unit would not start
> I pulled the generator out and it started from the generator
> panel & ran normally after a couple of attempts. This happed once before a
> couple of years ago.
>
> 13. I kept the unit operating for approximately 4 hours with the top
> airconditioner operating. (98 degrees outside)
>
> 14. When I left the parking lot I had my wife shut down the unit from the
> remote switch. She said all indications on the panel after holding down
> the switch in the stop position that the unit was shut down. She has
> accomplished this task many times with no previous problems.
>
> 15. However when I arrived at the camp site I noticed the generator was
> operating again so she shut it down again as before.
>
> 16. Now during the night 2:30AM a loud banging was coming from under the
> rear of the coach near the generator (That was a quick wakeup). To my
> amaze the generator was trying to start itself. So I immediately hit the
> remote stop switch in the coach and the unit stopped trying to start.
>
> 17. Looking for suggestions from the experts to correct this problem.
> Maybe the problem is in front of me and I can't see.
>
> Will appreciate your help
>
> Bob