onan 5500 generator problems
generator driving me nuts. always well maintained, but now having issues. flash code not helping me. replaced fuel and filters and added seafoam to the tank. it will run for 10 minutes, sometimes up t...
Forum Discussion
Post the dataplate model and serial number (or model and spec code at least). It's very hard to give you much info without knowing which Onan 5.5 KW you have.
For most models, this will tell you if it's the coil - disconnect a plug wire, connect a spare plug, touch the plug base to the engine and press the start button, then release it. It should spark at least once. If it's sparking multiple times, then it's a gas or air problem. If it sparks only once, when you release the start button, the coil is working and it's something else.
If no spark (for most Onans), it's the coil. To be sure, measure voltage at the coil. If you get 12V on then off and no spark, it's definitely the coil.
For most models, this will tell you if it's the coil - disconnect a plug wire, connect a spare plug, touch the plug base to the engine and press the start button, then release it. It should spark at least once. If it's sparking multiple times, then it's a gas or air problem. If it sparks only once, when you release the start button, the coil is working and it's something else.
If no spark (for most Onans), it's the coil. To be sure, measure voltage at the coil. If you get 12V on then off and no spark, it's definitely the coil.
