20 Most Recent Kohler 30HP Replacement Engine CV750-3005 - Page 9 Questions & Answers

Check the block heater

Low water temp is because the engine block heater and/or thermostat has failed, or the outlet it is plugged into is dead.

Check oil and pressure switch, then stator for AC output, rinhs and brushes.

If it won't start in manual, you have a short and/or a bad control board. Make sure battery polarity is correct, did you disconnect battery charger before removing old battery? If not charger can push DC volts over 20V and can damage control board.

The governor and / control maybe your issue. Also if you have the electronic governor model, check the speed sensor screwed in near the fly wheel, it should have approx 2VAC on it during crank.

Check oil pressure and sensor first

If it runs that long, you may have a bad oil pressure switch, loose connection, or fuel pump. You didn't indicate whether the time was under laod or not

Nixon Power Services in TN

Is this set up for multi fuel????? or are you switching the fuel sources?If the generator is multi fuel it will have two input gas lines one for LP and one for NG. If you are just putting gas to the one inley pipe IE single fuel it won't work. In naturalg as there is approx 1000btus of energy cu/ft in LPV there is 2513 almost twice as much. As such if a generator is not truly duel fuel, when it is set up for LP a small orfice to restrict the LPV gas flow is installed in the fuel mixer / carb. If you try and run on NG it won't get enough fuel, this orfice can be taken out and it should run fine.

Contact www.advanced-power-technologies.com they can maybe help you

Check control circuit fuses, if you cannot hear the solenoid energizing even. If it is clicking and the battery is good, check starter windings

You didn't specifiy which model Kohler generator ???

Given the work you have done, you never mentioned if you have had the stator and rotor tested? if you can get it running check for DC power on the brushes. that will help isolate. If power blinks for a second, that is the control trying to flash the rotor, if the rotor has a short the controls will remove the excitation voltage. Check that before going to any major expense

You are going to have to register with Kohler and use this site to get your part:http://www.kohlerpower.com/residential/sectionfront.htm?sectionNumber=13561

OC is Over Crank which generally means it cranked and cranked and failed to start. Turning the switch off and on again is the way to clear the fault. How long is it taking to start whilst cranking? It should start within 8 seconds

Contact Nixon Power Services in Charlotte NC or TN. They can help you with a manual. You would have to purchase it

Is the battery system charged, normally a totally dead display is indicative of a dead DC circuit, check control board fuses also. Also have an electrician check the AC control fuses normally in the transfer switch.

Aux fault is caused by a momentary loss of voltage from the speed sensor or low coolant level sensor. I would suggest you investigate both for possible cause.
If the unit has a low coolant level sensor you can find it near the top of radiator, small two wire plug. Disconnect and see if unit runs. make sure radiator is filled to over flowing before testing to eliminate this as the cause. Just because you can see or feel the coolant is not enough, fill to overflowing is the key.