How to check fuel flow on outboard

so today we're gonna look at fuel one continuity or basically is the fuel getting from the gas tank all the way up to the motor so we're going to start off by looking inside of our gas tank we're gonna want to see that we have fuel and we have our pickup there that is submerged in gas so we can see down inside the tank the little black and white pickup a little screen on it that there is fuel from there next you'd want to come down your fuel line make sure that's connected tightly there obviously this is just screwed in it's not a clip-on connector fall to the fuel line come over to your primer bulb squeeze the primer bulb a couple times see how it feels note that it should take a little bit time to re-inflate when you let go that just means there's a few on there and you can kind of squeeze and feel that it is a little harder squeeze means there's fuel in there that's not just air so you know there is fuel inside your primer bulb and eventually after enough squeezes it should get hard like NAT right now I can't really even squeeze any more because it's totally full of fuel all the way up and it's a one-way valve it prevents fuel from back flowing so make sure that the arrows pointed in the right direction there so you got fuel flowing directly towards the motor so fuel should be flowing towards the motor there we'll go ahead and disconnect our fuel connector and because we squeezed so many times on that primer bulb there's a little bit of fuel pressure in there obviously we see we have fuel flow in here if you were unsure you could take that little brass plug there line that up normally goes to our fuel Inlet right there where this time we could push on the other side and as we're pushing on the other side there we could pump our primer bulb and see if fuel came out and if you'll come out then we would know we got fuel going at least this part of the motor so we'll go ahead snap that back together we'll follow along our fuel line here we can just kind of loosely tug on it where we see comes out the back side of the connector far along to our fuel strainer and looking inside there as we squeeze the primer bulb we should see a little bit of fuel moving around so we can see some air bubbles and some field moving around through this strainer here and then it moves through the strainer to the fuel pump so it comes in the fuel pump and then gets pumped out this direction chart carburetor and lastly it goes into the carburetor bowl the bottom part of the carburetor there so if you wanted to check and make sure you've got fuel all the way around going all the way to the carburetor you can take a flathead screwdriver with your flat-head screwdriver you can check that there's fuel in the bowl of the carburetor by just taking this brass plug and our brass screw and undoing it's just a few turn it's not even all the way out just a few turns and that confirms that you got fuel you can see it kind of dripping out there and so we know we have fuel in the carburetor bowl if we wanted to see that we make sure we were getting plenty of fuel enough to run the motor in fact then we could take the screw all the way out sometimes you could be getting fuel to your carburetor bowl but maybe just not quite enough to really run the motor wide open throttle maybe the motor runs at first when you first fire it up and it runs good at low speed when you try to go fast it dies out and stalls on you and then after a few pulls or a few minutes it'll restart again that's an indication that you are getting fuel to the carburetor bowl but not quite enough flow so now with the screw removed we'll go ahead and squeeze our primer bulb and we can see that's quite a good rate of flow for fuel the motor does not drink nearly that much so we know we're getting plenty of fuel to this one I've seen other motors though where you squeeze the primer baldwin's just a very slow drip every a few seconds and that might be enough to run the motor at low speed but certainly not high speed so we'll go ahead and reinstall our a little screw here and that's basically the end of the line for the fuel if you're unsure if you have a plug somewhere or you aren't getting fuel all the way to the end here you're not getting fuel to the carburetor you could go ahead and just disconnect each connection where the fuel lines meet together at the fuel pump at the fuel strainer at the fuel Inlet all your fuel connectors and check sequentially along the line how far gets and if you find that it gets all the way out of the fuel pump through this hose here and you disconnect this hose and it's getting all the way to the carburetor but it's not coming out the the little drain plug here on your carburetor Bowl then you could expect to have a problem with your float and needle valve at your car not getting fuel that way if say you do have a full bowl full of fuel and the motor still is behaving as if it's not getting fuel even though there's fuel in the bowl and everything else is normal you'd expect to have some plug jets maybe there's not mixing the fuel with the air so say the motor runs when you spray starting fluid or hold a rag covered in gasoline or starting fluid to your air cleaner your intake here but it does not run without that so you know that's getting air and spark but not fuel then you would expect to have to rebuild your carburetor here and just clean that out and clean up all the passages there so hopefully that makes sense if you have any questions shoot us a note on the website or leave it in the comments below hopefully you found this video helpful thanks for watching

Channel: ROWINTEL.COM

Views: 1,170,505

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Keywords: how to, outboard, outboard motor, Corrected Fuel Flow, yamaha, suzuki, honda, evinrude, mercury, boat motor, carburetor bowl, fuel, gasoline, fuel flow, outboard fuel flow, Engine

Id: 8GJxpXfakP4

Length: 5min 11sec (311 seconds)

Published: Wed Jan 21 2015