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jdemaris
11-29-2005 20:08:07
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Re: 350B fuel issue in reply to farrviewsouth, 11-29-2005 11:53:25
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The injection pump needs fuel delivered to it in order to run, but it doesn't have to be under any pressure. A gravity feed of fuel would work just as well as a fuel pump. So, as long as a clean stream of fuel is getting to the pump (not full of air) it's all it needs - but the air is a key issue. As far as the quantity the injector pump needs? Basically, what goes in, goes out. It needs the same amount of fuel going in, as it has to send out through the injectors. In regard to the fuel pump itself, very often the arm inside pump arm linkage gets worn, but the hand primer on the outside still works - so - it's not uncommon to have a worn out fuel pump that won't work off the engine, but WILL work off the hand primer. Also, in regard to fuel blockage, the fuel petcock that screws into the bottom of the fuel tank has a tiny passageway in it - maybe 1/8" a best and plugs pretty easy. To get the engine on TDC of compression stroke for #1 cylinder - you take the little timing window off the pump (if you have a DB or JDB pump) and crank engine until you see the two timing lines line up with each other. If you have a C pump, than there is timing pin on the pump, that you take off, turn around, and you stick into the timing hole. Back to the DB/JDB pump - when the lines seem to be lined up, take the big timing pin out the engine, turn it around, and stick it back into the hole it came from. This pin is part of a 1/2" bolt that is screwed into the engine and holds a little inspection cover on. Take it out with a 3/4" socket. It is a threaded bolt on one side and a straight pin on the other. When you stick the pin back into the hole, there will be a corresponding hole in the flywheel that it will go into when the engine is exactly on TDC. In regard to the bottom 3/8" nut on the injection pump - there is a special wrench made for it - Snap On sells it. When in a pinch, you can usually knock it loose with a hammer and a screwdriver (not very good for the screwdriver though).
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