Fuel starvation
Posted: Mon Jul 02, 2018 7:40 am
Was up and running just fine. After about 15 minutes of no wake and 5 minutes cruising at 3500-3800 RPM both engines stalled at the same time. I was able to restart them both fairly quickly. Got to our destination, engines off for about 45 minutes, then both restarted and ran fine until about 5 minutes again at 3500-3800 RPM both engines stalled again. This time I was only able to restart the starboard engine. Got back to harbor on one engine. Next day both engines fired right up. Went out again and basically the same thing happened again except this time I couldn’t restart either engine and had to be towed back to harbor. Now neither engine will start. Since both engines ran fine initially with no rough idle I don’t suspect spark plugs, wires, or anything ignition related. I checked the carb inlet screens. Starboard side was clean, port side had a little grit, but not enough to completely clog it. Not a drop of fuel came out on either side when I disconnected the fuel lines. I had to replace one line because the inlet fitting was rounded off and there was a slight kink in the line. Not a drop of fuel came out at the fuel pump either. I suspected anti-siphon valves being stuck and removed only the port side valve since both engines are drawing fuel from the port tank. It’s not like any of the valves you find today. It doesn’t even have a check ball. It has a plunger, spring and a disc held in place by a snap ring. I removed all three just to see if this was restricting fuel flow and attempted engine start...stil no start. Both water separating fuel filters are new. The fuel pickup tubes are soft hoses that are somehow sealed to the threaded hole where the anti-siphon valve screws in. Does anyone know if there is some way to remove it to check for a clogged screen of if there even is a screen on the end of the hose?