Cummins/Onan TGHAA — Corrective Action: Check the engine oil level and add oil as necessary. Repair oil leaks.

For the Cummins/Onan TGHAA.

Procedure

1. Replace Fuse F2 if blown.
2. Clean and tighten the positive (+) and negative (–) battery cable connections at the battery and at the genset (Page 8).
3. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations. Corrective Action—Engine Cranks But Does Not Start:
1. Open any closed fuel shutoff valve.
2. Fill the LPG fuel tank if less than half full. On cold days the LPG container may have to be kept at least half full to provide the rate of vaporization required to keep up with genset fuel demand. LPG with more than 2.5 percent butane will not vaporize below 32° F (0° C). Use HD-5 grade LPG.
3. Secure the spark plug cables at the spark plugs and at the ignition coil.
4. Make sure the governor rod is not hanging up on the spark plug cable (Page 8).
5. Check for proper fuel selection and change if necessary (Page 6).
6. Check the engine air filter and remove any blockage.
7. Check for a blocked exhaust system and service as necessary.
8. Replace the spark plugs and/or spark plug cables. CONTROL SWITCH OFF ALERT—CODE NO. 6 (The control switch has been in the OFF position more than 5 seconds, pr

Source: manual:965-0101B Onan TGHAA Genset Operator manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.