I am completing my annual inspection. I am reassembling my RV-4 and I pressurized the fuel system. I was floored to see the (size four) fuel sender line, from the engine driven fuel pump to the sensor manifold, leaking profusely. On disassembly I found that the fittings are secure but when I stripped off the stainless braid I found the hose is similar to a soaker hose. When pressurized the hose has pinhole leaks over its entire length. I used the same hose for the main fuel lines (size six) and the oil lines (size eight). Naturally I am going to strip out the fuel lines but I suspect the oil lines should be OK. All of the hose is the Earl?s Perform-O-Flex Hose which is rated for fuel, oil, pressure and vacuum. Perhaps there is an incompatibility with aviation fuel?
I can only wonder why the hose chose to fail at exactly the best time. It has taken me some time to complete the inspection and this line has probably been dry for two to three weeks. Perhaps that brought on the final failure. I have only used 100 Low Lead and the hose had been in service for two years and 90 hours.
Since I need to build up new hoses, is anyone aware of any problems with the Aeroquip hoses stocked by Van?s?
I can only wonder why the hose chose to fail at exactly the best time. It has taken me some time to complete the inspection and this line has probably been dry for two to three weeks. Perhaps that brought on the final failure. I have only used 100 Low Lead and the hose had been in service for two years and 90 hours.
Since I need to build up new hoses, is anyone aware of any problems with the Aeroquip hoses stocked by Van?s?