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Will not prime fuel and start - primer is squeaking

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1 Answer

Trimmer won't prime to start


Look inside the tank. Some units have a stone inside that blocks the fuel line when it is tipped a certain way. Might be what's happening here.

Aug 13, 2016 | Garden

1 Answer

How do i know if fuel hoses are connected to right sockets


Knowing the make and model will help. Some saws have a primer bulb that will suck the fuel through the carb to prime it.

If this is the case, here is the sequence: Fuel line from tank goes to the (fuel in) side of the carb. The (fuel out) side of the carb goes to the primer bulb the (suction side) The (blowing side) of the primer goes to the return to tank.


So when the primer is pumped it pulls fuel into the carb to prime it and any over priming gets returned back to the tank.

If you find this useful, please click the 'helpful' tab. Thank you

May 14, 2016 | 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 prime bulb looses pressure and first start is hard. I have to remove fuel line from filter and cover with thumb prime re install then first start takes time.


Does the engine run fine after it starts? Most common problem with primer bulb losing prime is an air leak in the fuel line or primer bulb. Air leaks don't always leak fuel. If there is an air leak between the primer bulb and gas tank there is no pressure, only vacuum. If it is not a major leak it might not leak without pressure but it will allow air to enter the fuel line. If it is a very minor air leak it could allow air to replace the liquid in the fuel line over time, but so little air once it is primer again that the fuel pump can over come it with volume of fuel.

Primer bulbs do not stay firm, as they are when initially pumped up, after the engine is running. There are check valves in the primer bulb that hold pressure in the primer bulb and throughout the fuel line to the engine. Once the engine starts the fuel pump creates vacuum drawing fuel into the engine diminishing this pressure and releasing the check valves. At this point the primer bulb is just another segment of fuel hose allowing fuel to pass through it as the fuel pump demands. The primer bulb functions much better when the outlet side is higher than the inlet side. This position makes it easier for the check valves in the primer bulb to seat and release as needed. If the primer bulb is functioning properly and is positioned with the outlet side higher than the inlet it should not be necessary to cover the end of the fuel hose with your thumb to get it to prime.

If the engine is hard to start after being fully primed there could be a problem with the fuel system on the engine. Some engines are hard to prime once air has entered the system, especially fuel injected models.

Dec 19, 2014 | Boating

3 Answers

Craftsman 550


Priming may not be the problem. First try putting some duct tape over the hole in the primer button. then try priming and subsequently starting it. This could indicate a need for a new air filter...I know it doesn't make sense, but it will probably be the answer to your problem. It was with mine although a different type of mower.

Jul 21, 2014 | Mtd 22" Yard Machine Push Mower

1 Answer

Won't prime the carburator to start


If the primer buld is hard to push or wont return to shape like its supposed to then there is an obstruction in the carb. If it just wont move fuel then there is a hole in the fuel line or the fuel line is rotted off in the tank.
If the primer bulb itself is discolored ( should be clear not brown) it should also be replaced.

Nov 08, 2012 | Homelite Garden

1 Answer

Craftsman tiller won't start unless I manually prime cylinder with gas. There is no primer bulb. Can I retrofit a primer bulb in the gas line?


Hi
You can insert a primer system into your fuel system
Just follow the fuel flow below
Please take time to rate me
Bud
10_30_2012_8_59_23_pm.gif

Oct 23, 2012 | Craftsman Garden

1 Answer

How do i prime 04 diesle vectra


should be a primer on diesol fuel filtre pump it till you feel resistance then try start if you had fuel filtre off ,best way is fill fuel filtre clean diesol refit and then prime till you feel primer getting stiff then start

Feb 26, 2010 | 2002 Volvo S40

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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