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Open Roads Forum  >  Tech Issues

 > onan 4000 microlite gen set start prob

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rvbob67

fl,usa

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Posted: 08/16/03 11:41am Link  |  Print  |  Notify Moderator

starter solenoid is chattering and starter not turning engine..measure solid 13.7 volts at solenoid input terminal. changed solenoid and same problem....any same experience? what was repaired?


robert sobol

gene avallon

attleboro,ma.

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Posted: 08/16/03 12:10pm Link  |  Print  |  Notify Moderator

having a problem on my 4000 almost like yours but no chattering,I had to take the starter out a few weeks ago when it got jamed in the fly wheel,now when I hit the switch it dosent have the power to get the fly wheel turning,if I just click it a few times and try again it starts turning,I think it just cant start when its at TDC,do you have that 13.7 when its trying to start
gene


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Chris Bryant

DeLand, Florida, USA

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Posted: 08/16/03 04:44pm Link  |  Print  |  Notify Moderator

Are you using a ground from the generator to measure the voltage or a chassis ground? I would hook the meter to the generator for a reference, and measure the voltage while trying to start it.


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DaveP

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Posted: 08/16/03 07:46pm Link  |  Print  |  Notify Moderator

Check the electrical connections for the 12 volts to the genset. The problem you described is what will happen with a loose or dirty connection. A volt meter will not show you if you have such a problem unless it is able to record upper and lower peaks. The starter draws a lot of current and needs a strong connection to the battery. Check all connections on the 12volt side and the chassis side. You need strong connections on both sides.


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rvbob67

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Posted: 08/16/03 07:58pm Link  |  Print  |  Notify Moderator

Quote:

starter solenoid is chattering and starter not turning engine..measure solid 13.7 volts at solenoid input terminal. changed solenoid and same problem....any same experience? what was repaired?


solenoid is not pulling in. generator ground was used to measured as generator is ground strap to chassis.

unfortunately do not have service manual,,,,looks like a trip to cummings/onan as local repair shops dont stock parts and no internet onan part procurement,,camping world used to sell and service onan exclusively..but now have generac instead...those $85 an hour service labor rates are brutal knowing the top tech are lucky to make $20 an hour !!!!!

bw_fencer

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Posted: 08/16/03 08:25pm Link  |  Print  |  Notify Moderator

A step beyond what Davep said - check the power source as well. The Battery terminals could be dirty. Check every connection from the battery to the gen set. Clean any corrosion. Check cable terminals for internal corrosion where wire enters terminal. Repace if suspect. Check voltage at gen set while cranking.


BW
2008 Newmar Essex

onecb

Salt Lake City Utah

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Posted: 08/17/03 09:18am Link  |  Print  |  Notify Moderator

If it were mine I would not only check all the connections I would take each one apart and clean them. That is on both sides of the circuit. The positive from the battery to the starter. The ground from the battery to the starter. On my gen there are only four places on each side so cleaning all of them does not take much time. Just my opinion.
Alvin


2007 Surf Side 29A Pressurepro tire pressure monitor System


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