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I can'get my engine to prime with fuel. - Craftsman Weed Wacker Lawn Edgers

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Get a new carb on ebay for 10 bucks or rebuild it for 15 bucks +labor

Posted on May 20, 2015

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Posted on Jan 02, 2017

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Will Vaseline lock the engine if you prime the fuel pump with it on a 2007 grand prix


There is no need to prime the pump with anything on a 2007 Grand Prix. The pump is submerged in the fuel tank and will push fuel to the engine without priming.

Dec 22, 2016 | 2007 Pontiac Grand Prix

1 Answer

If engine runs until gas tank is empty, will injectors need to be primed, and if so, how to prime them?


No, The injectors do not need primed. If having trouble getting fuel to engine, Check and be sure fuel pump is working properly. God-Bless! If not check the fuses and relay first.

Feb 06, 2016 | Cars & Trucks

1 Answer

Where does the vacuum hose fit ? Does it go onto the outlet from the rear of the fuel on/off/reserve fitting ?


Yes. The 3 outlets from the tap are prime/on/reserve.
Prime is used to prime the carb and allows fuel to flow without the engine running. On and reserve only allow flow when the engine is running. As you are probably aware, don't leave on prime as it will flood and overflow the carbs......only use to prime an empty carb.

Oct 22, 2015 | Motorcycles

1 Answer

Which way to turn the reserve tank switch on


There are 3 positions (as you probably know). Reserve, on and prime. Under normal conditions with a properly working fuel tap, prime is the by-pass that allows fuel to flow through without the engine running. On and reserve will only allow fuel to pass when the engine is running (uses vacuum from the carb).
  • PRIME has the handle facing down
  • ON is when it is facing the front
  • RESERVE when it faces the rear.
Do not leave the tap in the prime position EVER as this allows the fuel to fill the carb and with the engine running or attempting to start will cause hydrolock that will bend the pistons con-rods. Only use it to fill the carb with fuel and turn it to on or reserve as soon as you can.
If the bike runs using the prime position but will not run when on or reserve, then you may have a vacuum problem or a dodgy tap......assuming you have fuel that is.
Hope that helps.

Sep 14, 2015 | kawasaki KLE 500 Motorcycles

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

1 Answer

2008 Keeway Super Shadow


Full is on...res is reserve...Pri is Prime.
Do not leave it on prime !!! This is for re-filling the carbs when they have been emptied.
It is a vacuum operated tap, when switched to full or reserve, fuelicon1.png only flows when the engine turns over...prime flows fuel all of the time.
The tap should be set to full unless fuel is running low.
Leaving it on prime when not running can lead to serious engine damage !!!

Mar 26, 2014 | 2008 Keeway Supershadow 250

1 Answer

I have twin 135 hp Yamaha outboard engines. Neither engine will start when cold.Putting small amount of gas into air intake and engine starts, engine starts fine when hot. Choke solenoid working


just like a car before the car start the fuel pump shoots gas in the carb or a lawnmower you gotta prime it all the gas that was in the carbs when you shut them motors off has done evaporated check your fuel cells see if there is a hand pump to prime the carbs unless its electric fuel pumps either way them carbs have to be primed

Dec 22, 2012 | Motorcycles

1 Answer

2006 monte carlo wont start without priming


sounds like your fuel pump weak, need to check fuel pressure when engine won;t start and check with engine running

Sep 03, 2012 | 2006 Chevrolet Monte Carlo

1 Answer

90HP Yamaha won't turn over


It sounds like you have a air line busted somewhere i had one of my outboards do that it wouldnt prime for anything so i ran everything down checked the fuel pump and cleaned that out tore apart the carbs cleaned them bought brand new fuel hose still scratching my head i took off the air lines for the carbs and put new ones worked like a champ

Aug 22, 2012 | Boating

1 Answer

Wont start unless manually primed


Turn the ignition key to the ON position without starting the engine

You should hear the fuel pump priming for about a few seconds then shutting itself off.
If not hear replace the engine oil pressure switch
The 3rd wire to that switch is the pumps prime switch lead.
When the engines oil pressure is reached the computer will shut that circuit off and turn on the fuel pump relay
If you hear the pump prime the relay maybe at fault instead

Jan 19, 2011 | Chevrolet 1500 Cars & Trucks

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