Apollo industry Oil Alert Lamp constantly on. Generator wont crank

Change Spark Plug. Check The starting Switch with a Multitester if it have continuity.Start it again and check Spark with the spak plug unplugged and with the crankcase check the spark.
Check the oil level. almost all the new and modern generators have included an oil alert gadget that cut off for saving the engine.check oil level and refill if it need.start it again.

By fire I assume you mean spark at the plug. When turning the engine over with the key and the oil alert light comes on the spark is interrupted by grounding the system thus the engine cannot start.
First, look at the obvious things, check oil level if it is at the recommended level smell the dipstick if it has a strong smell of gas
change the oil and try to start it again. Be sure the plug is not soaked with raw fuel before you try the restart. I the problem persists you can disconnect the wire from the top of the low oil sensor.Try to start the gen. if it starts change the low oil sensor.
I hope this all makes sense to you , good luck with it.

BR

Your oil level sensor is bad. It needs to be replaced. If you unplug the wire leads to the sensor you may get the generator to run, but you'll have no low oil level/pressure protection. The oil level sensor is on the engine crankcase usually near the oil level dipstick. You'll likely see a small sensor with a couple of wires attached to it. To replace it, you'll need to drain your engine crankcase before removing the sensor.

Three of the most common causes for this would be:
- A worn spark plug (solution: replace spark plug)
- A clogged fuel filter (solution: clean or replace filter)
- Oil level too low/high (solution: check level, add or remove oil)

There are many videos available online that should help you fix this yourself. If none of these help, you should take the generator to your local dealer/shop.

check for low oil some have a low oil shut off system

Yes , if there is an errror on the oil pressure switch or a low oil level then the engine will not be allowed to turn in. Check and refill oil, check the oil pressure switch , it can be clogged and so might not work.

Remove cover to the generator and remove the brush holder (if brush type) and any other parts bolted to rear. Remove wiring harness plug (most generators have an easy method to unplug all the wire from panel). Unbolt and remove the outer bell of generator leaving only the armature(use caution not to damage wiring, use camera to photo document the steps ). Remove the center bolt thru armature into crank. With piece of hardwood and large hammer, rap on one side of armature (metal part) then the other (careful not to miss the wood and damage the armature or wiring). The armature sits on tapered crank and will stick over time, may need to use penetrating oil. If your lucky, only takes a few hits on each side to break contact. Good luck

Always have a new spark plug handy to determine if faulty plug when no or weak spark. If your engine has an oil alert, disconnect sensor wire and re-test. If still no spark suspect spark plug boot or coil. New or used coils are available at small engine repair shop. If you have access to growler (used for testing armature), by placing coil on growler with one leg on each pad, you can test coil for signs of life. Good luck

That is easy enough to tell if it is the oil alert malfunctioning by disconnecting the wire that goes to the oil alert and making sure the wire is not grounded and check for spark.

Generator with Integral Rear Mount Voltage Regulator, Internal Fan Type With the key in the RUN position, voltage is applied through the charge indicator lamp I circuit to the voltage regulator. This turns the voltage regulator on, allowing current to flow from the battery sense A circuit to the generator field coil. When the engine (6007) is started, the generator (GEN) (10346) begins to generate alternating (AC) current which is converted to direct (DC) current by the rectifier internal to the generator. This current is then supplied to the vehicle's electrical system through the battery positive voltage (B+) terminal located on the rear of the generator. Once the generator begins generating current, a voltage signal is taken from the stator and fed back to the voltage regulator S circuit, turning off the charge indicator/lamp. With the system functioning normally, the generator output current is determined by the voltage at the A circuit. This voltage is compared to a set voltage internal to the voltage regulator, and the voltage regulator controls the generator field current to maintain proper generator output. The set voltage will vary with temperature and is typically higher in the winter than in the summer, allowing for better battery recharge. With the system functioning normally, the generator output current is determined by the voltage of the A circuit (battery sense voltage). The A circuit voltage is compared to a set voltage internal to the voltage regulator, which controls the generator field current to maintain proper output. The set voltage will vary with temperature and is typically higher in the winter than in the summer, allowing for better battery recharge in the winter and reducing the chance of overcharging the battery in the summer. A fuse link is included in the charging system wiring on all vehicles. The fuse link is used to prevent damage to the wiring harness and generator if the wiring harness should become grounded, or if a booster battery with the wrong polarity is connected to the charging system. Mitsubishi 215-Ampere Generator
The Mitsubishi 215-ampere generator is an internally regulated, brushless unit that is self-current limiting and temperature compensating. The regulator is integral with the generator and the fan is external.

VISUAL INSPECTION CHART Mechanical Electrical

• Before attempting to test a battery, it is important to give it a thorough examination to determine if it has been damaged.

• Batteries are tested to determine the state of charge and ability to crank an engine. The result of these tests is to show that the battery is either good, needs recharging, or must be replaced.

• Preliminary checks to the charging system should be made regardless of the fault condition. These checks include:
  • Check the fuses/fuse links to the generator to ensure that they are not burned or damaged. This condition, resulting in an open circuit or high resistance, can cause erratic or intermittent charging system concerns.
  • Check battery posts and cable terminals for clean and tight connections. Clean the posts and the cables to ensure good electrical contact.
  • Check for secure connections at the generator output, voltage regulator and engine ground. Also check the connection at the power distribution point.
  • Check the generator drive belt to ensure proper tension and no slip between the generator pulley and the drive belt. Refer to Section 03-05 in the Powertrain, Drivetrain Manual.
  • Check battery for full charge.

• Before performing charging system tests on the vehicle, note conditions such as: slow cranking, discharged battery, charge indicator lamp stays on with engine running, charge indicator lamp does not illuminate with ignition switch in RUN and engine not running, etc. This information will aid in isolating the part of the system causing the symptom.
• When a relatively new battery is discharged, test for current drain. The following are some of the most common current drain concerns:
  • Glove compartment lamp stays on with the door closed.
  • Engine compartment lamp stays on constantly.
  • License plate lamp or interior lamp stays on constantly.
  • Other electronic component concerns.