Haven't posted here in quiet a while, but I guess this is a good time to start. I have a Simplicity 7790 diesel mower and some of the fuel lines have dry rotted and are leaking. Is there some way to tell the difference between the high pressure fuel lines and the other lines on the engine. Also, once I've found the high pressure lines, how are they removed and do they need to be taken to a hydraulic shop to have the right length made up. I'm a newbie at this, since I've never replaced any hydraulic lines before. Thanks for any help give.