Question about Onan Generator, 6500W, LP Vapor

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Onan genarator will not crank

Whe I push the started switch it willnot crank.It has power to solenoid. I have checked fuses and traced down wiring. It is in a RV. Onan Marquis 6500 lp.

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If it wont crank, check to see if the solenoid on the starter pulls in, the starter and solenoid are one unit, it sounds like an internal starter contact, if you have 12V going to it. Assuming the battery is good. When you press and hold the stop button does the fuel pump pump prime? if so control board has power

Posted on Apr 16, 2014

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Odds are that the ignition switch or wires are giving you the grief.
Thee unit will probably be getting spark power through the starter solenoid (look for a wire there) but when the solenoid is not activated, there will be no ignition power.
Take your time and trace it down.
You'll get it.
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If the problem is the starter won't crank the engine over, check the small wire at the solenoid (the one from the ignition switch). It should have power when the key is held in crank. If no power there, trace the signal back to the ignition switch-check the neutral safety switch-at the clutch pedal-or the park/neutral switch on the transmission, if automatic. Check if the ignition switch has power out of it on the start wire with key in crank. Use a voltmeter or testlight for checking.

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First thing to check would be the starter solenoid-mounted on the starter. In the starting circuit, that is the most high use/high wear item. A tech would wait for the no start condition, then check the solenoid wire for power when key is held in the cranking position. If power is there, it indicates a faulty solenoid. If no power, trace the signal back to the ignition switch-from solenoid to starter relay to clutch switch to ignition switch.
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See if you have power at the solenoid wire when key is held in crank position. If you do, then battery connections are not tight, or you maybe got a defective starter or solenoid. If no power when key is held in cranking position, trace the start circuit backward from the starter solenoid to the ignition switch-starter relay and the neutral safety switch are in that path. Check for power in the start wire leaving the ignition switch, by backprobing with a voltmeter or testlight the ignition switch harness connector.

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Nice descriptive statement. Too bad it can't be flushed and forgotten!

Some testing will have to be done to find all the problems. A new battery and starter is a good start. It will make finding the no crank problem a lot simpler and hopefully not expensive. You could check for power to the starter solenoid when key is held in cranking position. If you have power there, check grounds and battery and starter cable connections-starter is not getting power from the battery. If no power on the solenoid wire, you will have to trace the path from the ignition switch to the solenoid to find the problem. I hope you have a wiring diagram for the start circuit, You said you checked fuses. Did you check if they all have power with key on? Something like a fusible link (if your car has them) could blow out and cut power to fused circuits.
Well, good luck. Post back if you find anything or need more help "polishing".

Jun 12, 2012 | 2000 Volkswagen Passat 4Motion

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Won't start


So it's a no crank condition? Do dash lights, gauges, and everything else work when the car won't crank over? If so, buy a cheap $5.00 testlight, and when the car won't crank, pull the small black wire off the starter solenoid. While someone holds the key in start (cranking) position and clutch pedal depressed, see if the black wire has power as it should. (Ground the testlight and just touch the wire's end terminal. If powered, the testlight will light up.) If power there, then the starter solenoid is failing. Toyota starters are very good units, but the solenoid's internal contacts get old and pitted.
If no power at the black wire, then the start circuit from ignition switch to clutch safety switch (on the clutch pedal) to starter relay to starter solenoid will have to be diagnosed. To double-check: take a single battery jumper cable and put it on the positive battery post connection. Put the other end of the jumper cable on the solenoid terminal where black wire was removed. Key can be off. Make sure car is in neutral, brake set. If starter now operates, solenoid is O.K., and it is a problem in the start circuit, -ignition switch, neutral start switch, or in the wiring.
Now find a grounding place for testlight under the dash. When car won't crank, check for power coming out of ignition switch on the black wire with white stripe. This is the start wire for the starter solenoid. Key must be in crank position. Wire shoud be powered-ignition switch is working. If no power, switch is failing. You can do the same for the clutch start switch-it's a simple switch, that when clutch is depressed switch is closed and passes power on from ignition switch to the starter relay (thus allowing power to the starter solenoid). Black wire, red stripe-this is wire from clutch switch to starter relay. When key is in crank, clutch depressed, this wire should be hot.
With me so far? Still haven't found a problem, or any loose connections? Next and last is the starter relay. It is located under dash, close to gas pedal, but under the center console, just forward and left of gear shifter. It can be tested and the wiring diagnosed there, but relays are cheap, so just swap in another and see if that helps.
If you have tried everything, and still no help, you could try a new wire from the relay to the starter solenoid. This is that black wire we started with. Older toyotas sometimes have a problem with degraded wiring not passing enough current to operate the starter

May 04, 2012 | 1992 Toyota Tercel

1 Answer

Will not crank battery good current to trans selector good fuses good starts with jump wire to solenoid still no current to solenoid when key is in start pos. replaced ign sw no change


you never mentioned if you have power from the switch, check for power in and out of switch with volt ohm meter, then trace wiring to starter

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1 Answer

Try to start it and nothing happens it wont turn over


Check all your fuses..It maybe just your fuse for the ignition...which in fact turns your starter over.... And yes your starter is good, if it tries to crank when you jump it..Now if your fuses are good, then yea your problem mat be the ignition switch itself....But check all your fuses first...Goodluck...

Dec 15, 2009 | 1996 Pontiac Sunfire

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