Fuel Problem - Need Help!

Hope somebody has an idea on this one: Had the CAV fuel pump on my Volvo Penta MD7A rebuilt 3 months ago and everything seemed fine after bleeding and finding a small air leak on the bleed screw of the fuel filter. Labor Day, I took it out for a sail, ran the engine for about an hour, sailed for about an hour, and after the sail the engine wouldn't re-start (making me think gunk in the tanks had gotten jostled up during the sail). So, back at the dock: bled it again and got it to where it would start up, run for about 5 seconds and then stall (regardless of throttle setting). In an attempt to eliminate bad fuel in the tank, I took the fuel intake line and stuck it in a can of clean diesel. Same result. So I went ahead and replaced the fuel filter (even though I had just replaced it right before the pump rebuild), bled the system again, and she started right up. Ran beautifully for 10-15 minutes, so I shut her down. Attempted to start it back up and, you guessed it, back to running for 5 seconds, then stalling. Any ideas on where to look next would be greatly appreciated! John Stacklyn Cal 31 #33 "Sol Survivor" Shell Point, FL

On 9/23/2010 2:54 PM, John wrote: > Hope somebody has an idea on this one: Had the CAV fuel pump on my Volvo > Penta MD7A rebuilt 3 months ago and everything seemed fine after bleeding > and finding a small air leak on the bleed screw of the fuel filter. Labor > Day, I took it out for a sail, ran the engine for about an hour, sailed for > about an hour, and after the sail the engine wouldn't re-start (making me > think gunk in the tanks had gotten jostled up during the sail). > ***** This can happen because the fuel in the return line has siphoned back to the tank. The injectors were also drained of fuel. The return line should have a loop that is just below the bottom of the tank to prevent this problem. > So, back at the dock: bled it again and got it to where it would start up, > run for about 5 seconds and then stall (regardless of throttle setting). ****** Did you bleed just the pump, or the injectors also? *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/> *phone & fax (860) 666-2184* > In > an attempt to eliminate bad fuel in the tank, I took the fuel intake line > and stuck it in a can of clean diesel. Same result. So I went ahead and > replaced the fuel filter (even though I had just replaced it right before > the pump rebuild), bled the system again, and she started right up. Ran > beautifully for 10-15 minutes, so I shut her down. Attempted to start it > back up and, you guessed it, back to running for 5 seconds, then stalling. > > Any ideas on where to look next would be greatly appreciated! > > John Stacklyn > Cal 31 #33 "Sol Survivor" > Shell Point, FL > > > > > ------------------------------------ > > Yahoo! Groups Links > > > > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.856 / Virus Database: 271.1.1/3154 - Release Date: 09/23/10 02:34:00 > > -- *Joe DeMers - owner* Sound Marine Diesel LLC SoundMarineDiesel.com <http://www.soundmarinediesel.com/> *phone & fax (860) 666-2184*