It has been two years this month since I first bought my Hatteras. The generator, an Onan 20kw, ran reasonably well and very occasionally cut out when I was running her or staying on board her in Stuart, USA. After picking her up in Newcastle, Australia, I filled all tanks to the brim. The genset would run strongly for hours, while the mains were running or not, but then suddenly cut out. I would prime the fuel pumps, as the generator is fed from the same manifold as the Port main, and the gen would kick back in for another hour or 5 minutes, no telling. It gradually got worse, but every time I heard the generator begin to choke, I would turn on the prime pumps and she ran well: This happened on all the tanks. I assumed bad fuel/lines or both. I know the fuel is dirty, I have changed the filters (6 off) twice this year and it is clearing up) Asked the local experts, they replaced the generator fuel pump. No improvement. Also, no sign of overheating, she would start immediately after priming. Sometimes she would not stay running from the start of a trip, so no overheating involved. Situation was getting so bad that part of my list to do before the summer season was to put in a new and separate fuel line for the genset. However, while I was changing all the impellors, including the generator, I tested her and what do you know….no matter which tank I run off, she will not cut out, even while I start the Port engine, which I would expect, seeing as they are competing for the fuel. So question is: would an impellor make the difference? The old impellor was in bad shape, missing a blade and misshaped. Thanks, and being superstitious, I darn well hope that tomorrow she is not back to her old games!