Bleeding a BMC 1800 marine fuel system

0:06 This is an 1800 BMC marine engine. We're just going to look in this video at how to bleed the fuel system. So, here's a picture of the engine. Uh you can hear it just ticking over in the background. And the process to probably takes about I'd say probably take a couple of hours to do it properly. and make sure there's absolutely no air bubbles and it runs like a charm. Like this one, in fact. This is your fuel filter unit. This has got your first three bleed points for the engine on it. It's got your fuel entry point. It's got your fuel exit to the fuel

0:51 regulator and it's got the pressurized re-entry. Those are your first three points. up and down the engine. You can see we've got the fuel regulator unit and that we've got three bleed nuts on the top of the housing and on the side the regulator and also into the first fuel

1:40 injector. If we look on the other side of the engine, we have the fuel pump. And beneath the fuel pump is a small lever which if you move up and down with your finger, you will use to push the fuel manually around the engine. These are the [Applause] injectors. There's four of them. These are the four final blade points. We'll be doing these two at a

2:28 time. If you like me run out of fuel, it's very likely you're going to have to change your fuel filter. [Applause] It may sound obvious, but you're going to want to put some fuel in your tank because um it adds a bit of pressure and uh Um, when you're pumping the fuel around, last thing you want to be doing is pumping more gunk or mass or

3:14 anything. And, um, to make the job easy, I guess you want to put put a bit of fuel in there first. You need to locate the fuel pump on the left hand side of the engine and um practice giving it a few pumps with your finger. Um once you've done this, you can try taking the first bleed point off which is straight from the fuel um pump. And if you take it off with a I think it's a 13 mil spanner and uh give it a few pumps and uh the first good sign will be

3:59 that fuel should be coming out of here in spurts. So that would be your first step. Locate the f fuel pump and then uh it will be pumping out fuel. Um if it doesn't do that then you've got quite a major blockage in one of your um fuel tubes. The next step is to go around the um the blade points. So you've got the one which I mentioned and then you've got the second one which is leading to the fuel regulator. Again, um if you've got a new filter on, this should be coming out in

4:45 spurts. So even pumping it with your hand manually. It's going to be coming out quite well. Um so let's assume that that's done. And um the next one you should do uh really should be on the uh fuel regulator. Um if you go down to the fuel regulator, look on the top of the casing and uh you can undo it with an 8 mil socket. Undo that. And again, a few minutes worth of pumping. Probably about five. Um and it should be coming out with fuel from there. Just as a note, you don't want to undo any of the bleed nuts on the regulator housing

5:33 so that they fall out. All you need to do to them is is you need to loosen them. Don't undo any of them just to finish the job off. Um once the housing um bleed nut is is dribbling out fuel um you'll need to do number five um which is on the side of the of the regulator pointing out um horizontally. I couldn't I found that one quite difficult and

6:19 um I just used the engine and number four uh or number number six um use the engine again. And um next one after that would be um the the re-entry to the fuel filter. Again, use the engine. Um fuel injectors can't even do them manually. I don't think it's even possible to do them manually. Uh, so anywhere from really from the top nut on the housing onward, you're going to be using

7:06 the the engine. And um basically you're wanting to see the injectors um sort of dribbling out um a good amount of diesel. Um, and once they're kind of they're dropping it down into your sump and flowing it all over your engine, then um it's time to unplug them. Uh, and then plug in the other two and do the same thing, trying to get them flowing with the uh dirt dribbling down your engine into the sump.

7:53 And once that's done, it should be almost wanting to start anyway. So, it should be um almost ready to go. Um bug him, man. Do him up. Bob's your uncle.