RE: engine dying
G'day
If I dropped a receiver in fuel, I would wash it out with metho (de-natured alcohol) and then let it dry. I am pretty sure it would still be OK.
Some years ago we, at work, had a hydrophone streamer which we towed behind an Australian navy vessel. The streamer was filled with electronics and a liquid called Shell Sol-T. The Sol-t made the streamer casing and the wiring brittle so we tried all sorts of other liquids to use. I suggested castor oil and it ended up being the best as it did not harden the plastic or cause any damage to the electronics.
On a similar note, way back in the early 1980s, we had some early computers. An operator spilled coffee into the keyboard and the serviceman told us we needed a new one for about $1000. My mate, our technician, washed the keyboard with Freon, then distilled water and finally with metho to dry it out. He then let it dry for a few days. It worked perfectly. Modern electronics is amazingly tough.
Mike in Oz