Scooter fuel pump diagram

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Scooter fuel pump diagram

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Thread starter Wolver Start date Mar 24, Status Not open for further replies. Wolver Cordilleran Moderator. Gravity Fed: Fuel tank is higher than the carb. Vacuum from engine actuates the diaphram inside the fuel cock which releases fuel into the carb basin, if engine is not running, fuel cock si at CLOSE position thus preventing more fuel from entering the carb basin.

Though the valve float from the carb does also prevents fuel from flooding the carb. There are some carburetors that doesn't have any Vacuum Line A, which commonly installed on Underbones. As for the fuel pump, vacuum from the engine actuates the diaphram inside the fuel pump and this diaphram pushes fuel into the carb, to avoid the fuel pump from giving too much pressure into the valve float that is closed most of the time, return line is needed to ease the pressure that may build up into the fuel pump's diaphram.

If return line's clogged, fuel pump may break down.Applicable to new orders only. Coupon code must be entered at the time order is placed. Discount does not apply to shipping charges. Customer Service. Contact Us. Shipping Policy. Warranty Policy. Easy Returns. Welcome, Guest! Log-In or Register below.

Troubleshooting - Scooter won't run

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Freedom Freerider Fuzion. Genuine Go-Go Golden.It all starts in the tank of course. Most scooters will have a tank located in one of three locations. Behind the seat, under the seat, or in the floor.

The scooter fuel system begins here. You can refer to your manual to find your location. The next destination of fuel from the tank in the scooter fuel system is the fuel pump. The pump will most likely look like the one pictured here.

It can usually be found within a few inches from the tank and is sometimes mounted onto the bottom of the tank.

Please see my videos on scooter overview to see other locations of the fuel pump. The fuel pump is most likely connected to vacuum lines, but the one we are looking for now leads to the carburetor.

This is where the fuel is being pumped to. The fuel will run through a small black fuel hose into the carburetor inlet. And that's really it! Now please note some important points. If any of the vacuum lines are kinked ever so slightly, this will stop the scooter from running. If any of the fuel lines are kinked ever so slightly, it will stop the flow of fuel and stop the scooter as well.

Please check and double check all lines for bends when troubleshooting your scooter! Scooter Fuel Sysytem !! ATV General Maint. About Scooters Scooter Maint.Applicable to new orders only. Coupon code must be entered at the time order is placed. Discount does not apply to shipping charges. Customer Service. Contact Us. Shipping Policy. Warranty Policy. Easy Returns. Welcome, Guest! Log-In or Register below. Log In. Shop By Category. Mini Bike.

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scooter fuel pump diagram

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scooter fuel pump diagram

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Mobility Scooter and Power Chair Parts. Recreational Scooter Parts.One way to bypass all these components is to rig up a temporary gravity fed fuel flow directly to the carburetor. If you connect a fuel supply directly to the carburetor from a container held above the level of the carburetor and the scooter revs freely, you've identified the problem and you need to check or replace each component of the fuel supply to make sure it's working OK. Ignition and Spark If the scooter starts, it must be getting some sort of spark, but the spark may be weak or there may be a problem with the ignition timing.

The first thing to do is remove the spark plug and take a look at it. If there are heavy deposits on the tip black or whiteor if it looks worn or damaged or if the gap isn't what it should be, it should be replaced.

If there's no difference, at least you now have a spare plug if the one in the engine ever does fail! Faulty ignition timing can cause running problems but today there are very few scooter engines on which you can alter or adjust the ignition timing.

The CDI is a sealed unit and if it's bad all you can really do is replace it. They're usually pretty reliable though, so that might be something to try if all else fails to find a problem. Air and Vacuum Leaks Leaks in the air or vacuum lines can cause problems too. Usually it's leaks in the vacuum lines which control several functions related to the carburetor operation and fuel supply. First check all the vacuum line connection and the lines themselves for splits and cracks.

If they look OK you can spray water on them while the engine is running and see if there is any change in engine speed. If there is, the liquid will temporarily plug the leak and the engine speed will change. Some recommend spraying WD40 or carburetor cleaning fluid on the lines, but if you do there can be a risk of fire, so be careful. If you find a leak, you should replace, rather than attempt to repair, the affected line. Carburetor Carburetor problems are the most likely source of poor running.

If the adjustment is OK, or you can't get the engine to idle well, then comes the next step. Over time especially if the scooter is stored for long periods of time with gas in the carburetor"gummy" deposits can build up. These are the residues which are left behind when gas evaporates. They can clog internals valves, jets and passages inside the carburetor which can affect fuel flow.

The best way to deal with them is to remove the carburetor from the scooter see carburetor rejettingtake it apart and soak it in carburetor cleaning fluid, which will dissolve the deposits. Make sure the jets are clear too. Valve Clearance Adjustment Valve clearance "valve lash" can affect the way the engine runs. This is the clearance between the camshaft and the valve stem.

If it is too large, the valve won't open all the way and if it is too small or non-existentthe valve may not properly close, which can lead to overheating and valve seat damege. Either way is a problem. The procedure for adjusting the valve clearance is given on the valve clearance adjustment page. Scooter Focus All about gas powered motor scooters Scooter Focus - Site Map. Troubleshooting - Scooter won't run.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

scooter fuel pump diagram

It only takes a minute to sign up. I bought a VIP Future Championtook it to the shop and had the heads changed because the mechanic said it had bad heads, so dollars later I went in to pick it up and the mechanic says there is a knock in the lower engine, he starts it up it starts right up and lets it run for about 30 seconds, so my friend and I go outside to talk and decide to take it home rather than pay the additional dollars.

Troubleshooting - Scooter won't run

We go in to get the scooter and suddenly it won't start. I think the mechanic was shady and did something very simple to keep it from starting. It's hot and I'm tired of walking after spending bucks on a scooter.

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Why wouldn't it start and hasn't started since? The mechanic said there was a knock in the lower engine, but he started it right up to show us. It doesn't ignite, but tries to start. I just assumed it might be something simple, because my past experience with shady auto mechanics is like with my Ford Taurus for which the mechanic flipped the fuel pump relay switch in the trunk without my knowledge and acted as if it wouldn't start Then the next day I went to get my car tired of giving the guy my money and he had a fake mechanics lean drawn up and Well, long story Anyway, I assumed that since he started it right up and two mins later it didn't after I went outside with my boyfriend and decided I wasn't given him any more money, that maybe there was something simple and stupid like that?

Diagram : Fuel Line, Return Line, Fuel Pump, Fuel Cock ... Etc.

Should I have left my scooter in the shop and given him another dollars? The starter works fine and everything else seems to work except it just won't get going or turn all the way over or run. It's in my back yard right now.

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The battery is fully charged, and I tried starting it a couple of minutes ago. I'm sitting outside with my laptop and my scooter. Oh What would be a couple of ways to maybe troubleshoot and figure out the problem? Am I correct in that the upper hose that leaves the fuel pump go to the front of the carburetor? And the lower hose to the back?

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