Re: Farymann Diesel A30M Fuel Lines
This is an easy job. The fuel supply lines have banjo fittings at the end and over the last 33 years the rubber hose has hardened up, hence your leaks. These are not high pressure lines.
1) Undo the banjo bolts at each end of the hose and remove the bolt and the hose.
2) cut the compression sleeve lengthwise with a hacksaw to loosen it. (do not cut through the rubber)
3) use a screwdriver to open the cut and then pull the banjo fitting out of the hose. you will see that there is a hose barb on the banjo fitting.
4) Fit new marine fuel hose (5/16" or 8mm) with regular hose clamps.
5) refit the assembly to the motor with new copper washers.
6) bleed the fuel system.
If you have any doubt about doing this yourself (you do say in your original post that you are not very mechanical!), I suggest that you pay someone to do this for you.
Marine Diesel Engine Vendor