filter one time. That was when I had been fighting an air leak all season. I checked and changed everything on the engine that I could think of...several times. There was no rime or reason for the engine to quit like it did. Sometimes it would go two months without a problem and sometimes it would quit after a week. We finely thought it was the generator so we installed a separate pick up in the tank just for the generator and thought we had it beat. It worked for two months and then on the way up Baja the gremlin reappeared and stalled the engine twice in 30 minutes. It would last a few hours sometimes and then only minutes. Every time the engine stall you have to completely bleed it and that was getting really old. It was blowing 20 to 25 on the nose most of the time. My friend, Chuck, finely figured out that in you reacted fast enough and pulled the throttle back soon enough the engine would burble the air bubble through and we could keep the engine running and not have to re-bleed it yet again. That was all good but you had to be right by the throttle all the time and I mean all the time. Finely we got to Mag Bay and pulled in to take on fuel from the port captain and while doing so I decided to run on the "secondary" filter. The engine never missed a beat all the way to San Diego. I changed the fuel filter housing and solved the issue. Had I not had the second filter it would have been a very long trip back up. You never think that the filter housing could be bad. Or at least I didn't. Filters yes, but the housing? come on!