OMB Warehouse presents the Grey Goat Garage. Welcome back to OMB Warehouse at home of the Grey Goat Garage. Today we're going to put to show you how to hook up a fuel pump for any small engine. It doesn't have to be a predator. It can be whatever you want. We're going to work with overhead valve engines because those are most common today. I've got a hemipredator here that when I put the billet flywheel bill rod and rody cam in it, I went ahead and tapped the top of the block, one eighth NPT so I could put a fitting in it. That will allow me to run a pulse directly off the crankcase and we'll get to that in a minute. This is a very simple item and it's beautiful in its simplicity. In the top of this fuel pump, there's a bladder and this hooks up to a pulse port on your engine. When your piston goes down in the cylinder, it creates positive pressure in the crankcase. When it comes back up, it creates a negative pressure. That's what we call the pulse. You hook this pulse line up to the engine and the internal bladder will pump fuel through a system of valves here and the bottom of the pump. It's going to pull fuel in from the parallel port on this pump. Here's your pulse, here's the parallel port. That's the intake and that's going to push fuel out into your carburetor. The biggest problem that most guys have with this is these are all quarter inch lines. I don't know of anything that has a 3-16th line on it. The Predator engines, they all take a 3-16th line to the carburetor, not just the 2-12s but the 301s and the 4-20s. They all use 3-16th inch line into the carburetor. That is kind of restrictive but that's what we have to deal with. We'll work on that. When you're mounting this pump, I always like to keep this facing down. As your engine is going, it's splashing oil and it's creating a very fine mist of oil into the engine. If you were to run your pump down on the bottom side here, this line's going to fill up with oil and mist and it's going to fill up your pump with oil. Then oil will start coming out of this little brass breather here. I like to mount my pumps up higher. There will be some oil mist in the line but it has the opportunity to drain back. I have a simple mount here. If I mounted this here, I could hook up the hose to the pump, get this mounted on the bracket. You'll see that it's coming up and over. This way, I have every opportunity to make sure that I'm not going to have oil stuck in this line and purging itself out that breather hole. There are a couple of different ways that we can do this. You get a real good pulse coming off the block here but if you had a governed engine, that's not really an option. Let me show you a couple of other options. I have a hemmy valve cover here and I drilled a hole and tapped a little bit crooked. It's at the top of the valve cover so it would mount like this on this engine. We could orient this however we wanted to. Maybe I have it come over the side like this and away from the spark plug. It's important that this goes at the top of the valve cover and not the bottom. We don't want oil to accumulate in that line. Like I mentioned with the other line, it's good to have the pump above this. I could take my fuel pump with this scenario and mount the fuel pump in this orientation and get my line over there. That would be fine because I'm allowing the oil drain back and I've got enough line to allow that to happen. If you're going to drill your valve cover on a hemmy predator, so many people want to go off to the side of that little cast piece right there. I don't care about that. I'd rather have it directly in the center and catch a little extra metal with your fitting. That will allow it to be more solid long term. I don't know. This is fairly thin material right here. Especially if you had a steel fitting like this and you tighten it down, it will crack your valve cover. Go right down the center, use brass if you have that opportunity. On the non-emigens, the clones, the JX-200s, you can go right in the valve cover with it. There's an important part when you're drilling this hole here, make sure you stay out of where this internal baffle is because this is the internal breather. When there's pressure on this, this little valve here will open up and allow pressure to escape the engine. We don't want you to run directly from here for a pulse pump just because this is a one-way valve. By drilling in here, down far enough close to the flange where that can get a good pulse, you can run your pulse right off the valve cover as well. A lot of the billet parts will have the pulse on the side cover, on the billet side covers, but that's not really necessary. I've used the side cover. It's a little tougher to drill and tap that, but it's easy to do. Just anywhere where you can get into the crankcase, you're above oil level and you can get a good pulse that will run the pump just fine. These are real simple to install. You just have to wrap your head around at first, but once you get it done, you'll have plenty of fuel. When I'm adapting from quarter-inch line, we have an adapter that goes from quarter to three-sixteenths, but I like to have filters on all my stuff. There's this little collar filter that we sell that has both barbs on it, it has three-sixteenths and quarter-inch. This way, I can go quarter-inch into my pump and add out of my pump, I'm coming quarter-inch into this filter, and then I can put this filter in the three-sixteenths line. That allows me to have a filtered fuel system. It adapts the fuel lines down from the quarter to the three-sixteenths, and allows this to work well and gets rid of a lot of the issues that you're going to run across. Think about running an inline filter that has the adapter built in instead of just an adapter, and that way you're not going to have any junk get into your carburetor. Thanks for stopping by OMB Warehouse and the Greygo Garage. Remember, if you have any questions, help at OMB Warehouse.com, send me an email. I get back to everybody, and I'd love to help you out if you have any questions. Also, don't forget, visit us online, oldminibikes.com. That's where all the crazy guys and gals hang out with the minibikes. A lot of projects going on right now, so check it out. Thank you. The Greygo Garage is powered by OMB Warehouse. Check us out at OMB Warehouse.com.