40G quietpact rv generator shuts off the instant something is powered on. Sometimes it does run for about a minute before shutting down. Sometimes it's running and shuts down the instant the appliance is turned off. An a.c. testing tool indicates that wiring is correct. Also sometimes after one of these occurrences, the genset's circuit breaker is tripped.

Usually the generator will shut down if the ac is not present coming out of the generator. You stated that it still runs but no power on the output. Check your breakers first to make sure they are working properly. Depending on what board you have you can check to see if ac is present getting back to the board as well. If your board does not have this then they are using the frequency as a safety disconnect feature. That would lead you back to the regulator or loose connection or..dirty slip rings if this unit has brushes.

First I would replace the air filter.

• Fuel Filter Change Diesel Generac 75D - iRV2 Forums

  www.irv2.com > ... > MH-General Discussions & Problems
  
  Oct 2, 2011 - 9 posts - ‎4 authors
  Never changed a diesel fuel filter before. .... Mine was on the same side as the main filter tucked in the frame near the rear of the generator. It was a ... 0E1744 - Generac Guardian maintenance kit for RV QuietPact 75D & 85D ... Generator not getting fuel flow???
  14 posts
  Jul 10, 2010
  Changing Coolant in Generac Generator????
  4 posts
  Jun 15, 2008
  More results from www.irv2.com

  [PDF]Models 4700-0 - Generac Parts

  https://www.generator-parts.com/manuals/generac-rv/0D8351.pdf
  38 Generac® Power Systems, Inc. 22. 39. 23. 20 ... QUIETPACT 40G Recreational Vehicle Generator. Enclosure ... FUEL LINE, FILTER TO PUMP. 14. 0D7614.

  [PDF]Quietpact 75D RV Owner's Manual C4547 - Generac Parts

  
  

regulator maybe need to adjust or broken

If it backfires, check for manifold leaks, fuel mixture is too lean, timing is off, make sure it isn't spitting liquid into the cylinders and the LP is the right pressure, and the vapour coil is working

carburetor restricted due to long time storage drop carb fuel bowl unscrew the jet and pull down the fuel tube clean them and your generator should run much much better

Is there a fault?? All UL listed generators including Kohler are required to lockout on a fault on shut down. This really sounds like a problem with your 2-wire auto start connection between your automatic transfer switch and genset. RDT model automatic transfer switch it is the 2 middle wires on the green connector and terminals 3&4 in the generator. close to run and open to shut down. Any open at any time will cause the unit to shut down. The 12 will shut down instantly upon an open because your 5 minute cool down is built into the transfer switch.

Try to measure the voltage at the connector when trying to start.
If it is 12 V and the engine does not start - disconnect it and try again.

Have in mind that you must have protections (Shut down):

1. Low oil level;
2. Low oil pressure;
3. High temperature.

and this valve may be responsible for them.

It is very likely you are having a problem with the low oil pressure switch or the high temperature switch. Both of these are connected to the No.85 wire which in turn goes back to the control board. If the temperature exceeds the predetermined level (apprx 305 degrees F) the high temperature switch will then ground wire 85 causing the unit to shut down. Same thing with the oil pressure switch, if the oil pressure switch goes below 10 psi the low oil pressure switch will ground wire 85 causing the unit to shut down. To determine which is causing the problem disconnect first the low oil pressure switch (Located by the oil filter) and start unit if it contunues to run after 10 seconds and does not shut down then the oil pressure is the problem. Then you must use a mechanical pressure gauge connected where the low oil pressure switch is to determine if you actually have less than 10 psi of oil or if the low oil pressure switch is just bad. Try the same thing with the high temperature switch also located close to the oil filter if you disconnect it and it continues to run more than 10 seconds then you have and engine that might be overheating. Anything that gets caught in the air intake on the generator itself ill cause this unit to overheat, I've seen it **** garbage in through the air intake and cause the unit to overheat because of poor air flow. If their are no restrictions and you have good air flow than chances are you have a bad high temperature sensor.

Hope this helps, please let me know.