I crew on a Laser 28 every Wednesday. It is a fun boat that responds very well to minor tweaks to your sail trim. This has drastically improved my skills as it is very easy to see when you are too hard on the sheets, or too soft.
I just had to deal with the Buhk engines fuel lines being rotten and falling apart. This seems like no big deal to fix. Well it was fun and taught me a lot about that engine. There are a series of fuel lines that have banjo fittings on them. These banjo fittings are a whole mess of sizes but all use the same size of hose. This is not a common occurrence with Banjo fittings in north america. These banjo fittings make you believe the lines are dealing with much higher pressure than you are, they are all either before the injection pump or after the injector. So the pressure is not very high, 100 psi range. You can carefully cut the old crimp off and save the fitting. Then go and get diesel injection line at your local automotive store. If you go to a shop that make hydraulic lines they can fit new crimps over the old fittings. I had originally sourced a line that was going to be 3 weeks out and cost +$100 but this route ended up costing $34 for most of the lines.
Bleeding the Bukh is a pain. There is a manual pump on the port side fore of the fuel filter. I tried this but it took forever. Ended up flipping the decompression lever, cranking the engine for 5 seconds bleeding the air out in one place then after the starter cooled doing it to another. If the system still has air in it you can get it to start with a touch of ether on a rag and slightly covering the air intake. The engine will run and get you out in a pinch but more bleeding will be needed.
If there is anything specific you need let me know. If I don't have the answer I'll talk to the skipper