Hey guys. Was working on my Br600 today and noticed how I couldn't pull the fuel filter out of the fuel tank through the gas cap. The fuel line was too short. After doing some exploring, I discovered that there was a cap on the top of the fuel tank where the fuel line enters. This cap pops off for easy replacement of the fuel filter. When I had the cap out, I put a longer fuel line on so that next time I change the fuel filter I don't have to pop the cap off. Also I have heard that they have had problems with carbon in the 4mix engines. I decided to take out the spark arrestor screen so that any carbon would be able to exit the muffler freely. Just my 2 cents and thought it would be good to pass it along. Happy mowing.