Re: 6-71 Fuel Pump Problem
Not yet.
Its possible that the system drained back during storage.
Check the secondary filter cannister. Drop the element and see if its dry. If it is, snug it back up and crank again a few times, see if the level is coming up.
Also check the check valve that should be in the line and make sure you didn't pick up a slug of crud in there that's plugging it up.
Re: 6-71 Fuel Pump Problem
Had a similar problem after changing Racor's. When opening the check valve back up, it was maybe 4 degrees off of being in line. Enough to stop fuel flow on my boat. After an hour of tearing everything apart, I noticed that, moved the check valve so that it was exactly in line and everything started and ran fine. Stupid, I know but I hope that is the dumbest thing I ever do. Difference was that my engine ran for about 5 minutes before shutting off.
Re: 6-71 Fuel Pump Problem
i've had a similar and intermitent issues on the stbd engine (8V71) once in a while it won't fire or it will fire, stop after 10 or 15 seconds and not restart.
I have to insert a hand pump at the primary outlet and re prime the system by forcing some fuel thru the secondary and to the pump. I quicly reconnect the line and it fires right up.
it's one of these pesky glitch which don't happen often enough to make it worth tearing everything up but i will eventually have to fix it...
it seems to happen mostly when the tank is under 1/3 full so I'm guessing it must be sucking a little bit of air somewhere. Next time, I'll flip the fuel valve when it happens to see if' it's a plumbing issue between the tank and fuel mainifold or between the manifold and fuel pump...
Re: 6-71 Fuel Pump Problem
I lost fuel to an engine underway and called my mechanic. Here is what he told me to do and it worked.
First the pump is a gear type pump that can self prime. So he had me take a bottle of WD-40, spray it into the air filter while cranking. The boat started by butning the WD-40. With the engine running the fuel pump primed itself and all went well.
Although it worked, I am sure this idea will get some criticism from the big brains of the site because it just felt stupid spraying WD 40 into an engine. Safer than ether though.
Bruce
Re: 6-71 Fuel Pump Problem
On Our 6-71's I have run the engine out of fuel a couple of times.
You just have to manually fill the main filter on the motor and the secondary
Racor's. The motor has always fired right up after this.
Re: 6-71 Fuel Pump Problem
First take off your sedondary fuel filter (on the engine), pour it full of fuel, and put it back on. Then, do you have a manual fuel priming pump? My boat has a little manual fuel priming pump. It's a very small simple pump connected right in the fuel line between the fuel tank supply hose and the RACORs, with a black knob on the top, used when you change RACORs. I pump up fuel with it to refill the RACOR, then put the top on the RACOR tight and turn OFF the fuel supply valve to the tank and then pump some more. This pumps fuel towards the engine, including filling the Flo-Scan cannisters if they have air pockets. Works for 8V71s.
Doug Shuman
Re: 6-71 Fuel Pump Problem
Thought I'd give everyone a follow up. As suggested, I topped off all the fuel canisters with fresh Diesel. No luck. :mad:
I then ran off to our local DD dealer for a $90 rebuilt fuel pump. Actually twice - (NOTE THAT THE PORT ENGINE NEEDS A RIGHT HAND ROTATION FUEL PUMP) Installed pump and Still no luck. :mad: :mad:
As a sense of desperate panic set in I went to seek out the advice of the yard mechanic. He shrugged it off saying " i kin get er started in 10 seconds." He proceeds to pull out a can of ether :eek: but at this point, I'll try anything. Sprays the air filter and the engine came to life immediately.
I now wonder if I should have started with ether (or WD-40 according to Freestyle) and avoided 2 trips to the Detroit dealer. Live & Learn.
Re: 6-71 Fuel Pump Problem
So I take it that the issue was indeed a priming issue - and running it on ether kept the pumps going long enough and fast enough to get the fuel properly up to the injectors?
Just want to be sure I understand.
Thanks
Quote:
Originally Posted by Passages
Thought I'd give everyone a follow up. As suggested, I topped off all the fuel canisters with fresh Diesel. No luck. :mad:
I then ran off to our local DD dealer for a $90 rebuilt fuel pump. Actually twice - (NOTE THAT THE PORT ENGINE NEEDS A RIGHT HAND ROTATION FUEL PUMP) Installed pump and Still no luck. :mad: :mad:
As a sense of desperate panic set in I went to seek out the advice of the yard mechanic. He shrugged it off saying " i kin get er started in 10 seconds." He proceeds to pull out a can of ether :eek: but at this point, I'll try anything. Sprays the air filter and the engine came to life immediately.
I now wonder if I should have started with ether (or WD-40 according to Freestyle) and avoided 2 trips to the Detroit dealer. Live & Learn.
Re: 6-71 Fuel Pump Problem
Yep, cranking the engine only got the the RPM's to about 2-300 according to my tach. With ether, it bumped it up to about 600 for a few seconds which was enough to bleed the air and get the fuel flowing.
Question to Group - What's the real deal with ether? I have never used it before but have heard elsewhere that it should not be used because of possible engine damage. A properly tuned engine should never need it. The yard mechanic says he uses it all the time (on cranes & yard equiment) In my case, it was just what I needed. Should a can be kept on board just in case?