Question about Husqvarna Lawn Tractor 48" Deck, 23 Hp, Model# Yth2348

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How do you prime the fuel system so that the bulb between tank and carburetor is full

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I have cleaned the carb it runs fine but will not start after it cools down(have to prime). their is a silonoid in the bottom of the bowl I think is some type of saftey shut off not sure.

Posted on Mar 25, 2011

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Posted on Jan 02, 2017

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It does not start


During maintenance or replacement of the hoses it is easy to swap the hose connections at the primer. The center connection from the primer connects to the return hose that connects into the tank. The feed from the carburetor connects to the side connection of the primer bulb.

If the tank is full it can fool you as you prime because the return line to the tank that is full can be a pickup of unfiltered fuel and bring debris and air into the carburetor.

The primer pulls the fuel through the carburetor purging the air out. Usually seven strokes are recommended. You can observe through the primer bulb the air as it is purged resulting in no air left in the primer or carburetor..

Dec 22, 2015 | Poulan Garden

1 Answer

2 fuel lines broke (1 from tank 1 from primer bulb). Line from back of tank to back of carb still there. Which lines go where?


Do not mix them up!! Doing so will bring debris into carburetor. Assuming the line from back of tank to carburetor is the fuel feed line then you should also plan to replace it if the other lines have failed..

The primer bulb sucks (pulls) the air fuel through the carburetor thus venting out any air. The process draws the fuel through the in tank filter through the impulse fuel pump. The fuel connects via an internal carburetor passage from the pump to the needle valve and during the prime passes the needle valve into the pressure diaphragm chamber. From there the fuel is drawn(sucked) into the inlet side of the purge/prime valve and returns the air fuel into the tank.

The center hose on the primer is the return into the fuel tank. The hose from the center of the primer bulb goes directly to the fuel tank and is the return. The outer diameter hose connection to the primer is the connection made to the carburetor. By closing off the end of the hose you can test with your finger the function of each hose. You do not want to pass fuel into the carburetor by reversing the primer hoses.




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Dec 06, 2015 | Garden

1 Answer

I changed the primer bulb on my echo srm-210 trimmer but it will not prime fuel in the bulb. The grummet the three lines go thru on the gas tank is not sealing the lines tight. Is this the cause?


If there is adequate fuel in the tank to completely cover the fuel filter than I expect the bulb to pull the fuel through the carburetor.

If you are able to determine the fuel intake hose (the hose that connects to the filter in the tank) to the carburetor than removing the hose from the carburetor and close off the inlet connection to the carburetor with your finger,

You should be able to achieve a vacuum that as you stroke the bulb that it eventually stays down and will only return the to the normal position when you release your finger from the carburetor inlet hose connection. This will leak check the bulb and carburetor. If this is successful drawing a vacuum than there is most likely a leak in the hose between the filter in the tank and from where you had disconnected the hose from the carburetor. Lowes and home depot provide a kit with a wire that snakes through the grommet allowing for this hose to be replaced..

If you cannot achieve a vacuum than the one way valves in the bulb prime are defective or an air leak through a check valve, metering diaphragm or fuel pump. A carburetor repair/replacement is likely

Nov 26, 2015 | Echo Garden

2 Answers

Primer bulb not pumping fuel into carb, pull it out, no splits etc. Once I get fuel in it starts and runs fine??


Probably a valve in the priming system is stuck. It allows fuel to flow into the bulb from the tank, the valve should close then and allow the bulb pressure to spray into the carburetor. Could also be the opening into the carburetor from the prime bulb is blocked.

Mar 27, 2015 | Garden

2 Answers

My chain saw 14" homelite


primers pull fuel from the carb and dumps it back into the tank, so if the bulb will not prime the chances are the fuel filter in the tank is blocked, pull the fuel hose through the filer hole and replace the filter on the end.

Jan 27, 2011 | Garden

1 Answer

Model # 358.797180, 200 mph. At first I thought problem was carburetor being gummed up due to being improperly winterized by previous owner. Replaced carb with new, did not fix problem. Also replaced fuel...


The primer is just a small pump that is supposed to pull fuel through the carburetor from the tank supply line/fuel filter. The filter is supposed to be connected into the longer line at the rear of the tank. This lines goes to the carburetor uppermost port and the lower port is tied to the inlet side of the primer pump. Remove the tank side line from the pump during the pump test to make sure that you are not pulling fuel into the pump from the exit line. Try pumping fuel at this point--if nothing happens, swap the port connection at the pump and try to pump again--when correct, it will fill the tank supply line first, then the exit line from the carburetor that goes to the pump and finally fill the bulb. If you don't get fuel with either connection, then you have a leaking fuel line somewhere as you have already replaced the carburetor. Most saws use a rubber fuel line, not clear plastic. Hope some of this helps!

Nov 18, 2010 | Garden

1 Answer

When I push the bulb to prime the weedeater nothing happens.


It helps to know the purpose and function of the purge/primer bulb. It is designed to draw fresh fuel out of the fuel tank (line with in-tank fuel filter) and send it directly to the fuel pump side of the carburetor. Also, it's vacuum effect helps out it's next function of drawing any air/old fuel out of the carburetor from the metering chamber and sending it back to the fuel tank after it passes thru the bulb itself. This is how a remote primer bulb functions. It doesn't have to be completely full of fuel for the engine to run either.
So, you need to check 1. The fuel filter in the gas tank 2. The condition of the fuel line connected to that filter (the line should be soft and clear, not yellow and brittle). 3. The status of the fuel inlet on the carburetor (open). 4. The condition of the fuel line from the carb to the primer bulb
5. The condition of the primer bulb and its' plastic fittings. (the bulb shouldn't have any cracks or be severely discolored . These things apply whether the bulb is a stand alone type or mounted on carb type.
Carburetor mounted bulbs develop their own unique problems of operation due to the check valves that control fuel flow below them in the primer base assembly of the carburetor. Those valves are fragile and sometimes fail (strong solvents and high air pressure ruin them) and the fuel doesn't move back and forth properly causing carburetor malfunction.

Oct 25, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

HOMELITE EXPAND IT 26VT WON'T RUN


Well if you are missing parts?...No. How could anyone from where we sit. But the fact that it starts with starting fluid is a great sign however. First off, Fresh gas/oil mix is A MUST! No getting around that. OK first, when you pull the throttle (Give 'er gas) does the little lever at the carburetor move back and forth at all? if yes, then what happens when you hit the primer bulb? Does it push/**** fuel from the tank? (My homelite spits fuel out to the ground when I prime the bulb, most spit it back to the fuel tank however) See if priming it moves fuel. You should see a trail of bubbles in the fuel tubing. You have to see if you are getting fuel at all first. Then does it maintain the prime? If not? Then the primer bulb will usually remain empty. A good prime should always show a half full or 100% full bulb at all times. Let me know what we got so far.

May 10, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

Has Ryobi RCS 3535A chainsaw a fuel bulb priming


The numbers you supply don't cross to an operators manual but that is typical of Homelite/Ryobi. I'm going to make an educated guess that it does not have a primer system. Other Ryobi saws with primer systems include it in the specification. The 3535A does not. Close scrutiny reveals no primer.
IMO fuel primers on chainsaws are one more source of problems. In the USA ethanol additives attack fuel hoses. Without a primer routing is from the fuel tank directly to the carburetor and much simpler to replace. Primers on chainsaws operate differently than 4 cycle engines too. No fuel is injected into the carburetor or engine, its only purpose is to ensure the carburetor is full of fuel,
Typical Fuel hose routing:
  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
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HTH
Lou

Nov 14, 2009 | Ryobi 18-inch Electric Chainsaw Chain Saws

1 Answer

PRIMER BULB WONT PRIME


I would recheck the carburetor to make sure you put the diaphragms next to the carburetor and not the gaskets.
Please if it is not priming you may have the fuel lines hooked up wrong. Also check the fuel cap to make sure the vent assembly is there. If the tank is not venting, the tank will get a vacuum in it not allowing fuel to flow.
HTH
Good Day.

Nov 11, 2009 | Homelite 'Yard Broom' Leaf Blower

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