The last couple of years I have smelled fuel when first opening my aircraft doors. The smell had grown stronger over time. Once the smell had cleared it didn’t return for a day or two. I have been through two conditional inspections and one additional inspection of just the fuel system. No evidence of leaks for loose fittings was ever found.  Earlier in the year Finn reported a leaking fuel line and possible ethanol compatibility issues with the braded rubber lines most of us are using. Searching the automotive new groups confirmed this to be a new and common problem. One frequently mentioned complaint was a fuel smell in garages. Some reported the smell in as little as two weeks after installing new hoses. 

I replaced all my hose with braded PTFE and it appears to have eliminated the problem. I ordered the hose and fittings from Pegasus Racing.  811 PTFE hose and 811 forged fittings. The assembly was basically the same as other braded hoses with an additional two full turns at the end.

Bobby Hughes

RV10