Cummins Onan 5500 Generator

Bedlam wrote:
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You want to be careful about letting gas flow around like that. If it washes down the cylinder walls, the rings will have no lubrication and scratch up the surface. Check the oil level - If it is higher than normal or the oil smells from gas stop attempting to crank the generator.

I have had good luck with carburetor cleaner and compressed air to clean out gunked carburetors. I will spay cleaner through each port and follow with compressed air. Any pieces that can be removed are pulled and inspected for blockage. It's a good idea to snap pictures as you go through disassembly so you can refer back to them when putting it together.

Since yours is still under warranty, I suggest you take it in before any damage results.