I changed over my cooling system today. Removed the 30 gallon tank and installed an old 10 fin cast iron radiator. That part works great.
When done, I fired 'er up to charge my off-grid battery bank. After it warmed up, I removed the air filter and sprayed a bit of water into the intake........do that every so often to clean out the carbon. Slopped a bit of water, so unthinking (my excuse is that I was tired after a long day) picked up a rag to dry things off. The damned thing got sucked into the engine!!!!!
A 10" square cotton rag does slow things down. However, it did not stop, so figured what the hay, let it go and see what happens. After a few minutes it started to pick back up, resumed 650 rpm, and continued to charge the batteries. Has been running for another hour now.......everything normal.
That's one way to clean it up inside; would not recommend it though.
Cheers,
Hugh