Where is the primer on a lawn mower?
The good news is that you don't have to panic or run to buy a new lawn mower. Besides, where is the primer on my lawn mower? Primer bulbs are usually positioned on the lawn mower one of two ways. They're either directly on the carburetor, or placed at a distance from the carburetor and connected to it with rubber tubing.
Where is the start button on a lawn mower?
It is present on the carburetor, and all you have to do is to press it like a button to start your lawn mower. It works by squirting fuel into your engine. The good news is that you don't have to panic or run to buy a new lawn mower. Besides, where is the primer on my lawn mower?
How do you change a primer bulb on a lawn mower?
When you're certain the primer bulb is the problem, replacing it is fairly simple. For safety, wait until your lawnmower is cool before you work on it, and remove the spark plug. Look for a retainer ring around the primer bulb; if you find one, pull it straight off.
How do I know if my lawn mower primer is bad?
Faulty Priming Symptoms. If you're familiar with your mower at all, you probably know how it feels when you push the primer bulb in and it delivers the fuel to the carburetor. There's a slight resistance when you push it, and you can feel that it's pulling fuel from the gas tank.
Where is the primer on my lawn mower?
Primer bulbs are usually positioned on the lawn mower one of two ways. They're either directly on the carburetor, or placed at a distance from the carburetor and connected to it with rubber tubing. Once you've gained access to the bulb's housing, remove the screws that hold it in place.
Where is primer button on push mower?
0:234:21HOW TO Replace Briggs & Stratton Lawnmower Primer Bulb - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow what you need to do is push in a clip here that's holding the primer bulb to the carburetor withMoreNow what you need to do is push in a clip here that's holding the primer bulb to the carburetor with a flat screwdriver.
Do all lawn mowers have a primer bulb?
Most small engines use a primer bulb. A carburetor on a lawnmower is very small compared to the larger ones commonly found on older automobiles. Because of this, carburetors used on small engines usually have a rubber or plastic priming bulb that forces fresh gas into the carburetor bowl.
What does a primer button look like?
1:508:02How a Primer Bulb Works - YouTubeYouTubeStart of suggested clipEnd of suggested clipInto the bowl of the carburetor. And like i said the bottom of the bowl is going to be sealed up byMoreInto the bowl of the carburetor. And like i said the bottom of the bowl is going to be sealed up by that little red washer. There but the top of the bowl is going to be sealed up by this o-ring.
How do you prime a lawn mower engine?
How to Prime a Lawnmower CarburetorRemove the cap from the lawnmower fuel tank. ... Locate the primer bulb on the side of the lawnmower engine. ... Press and release the primer bulb three times with your finger to prime the lawnmower carburetor.Pull the throttle lever on the lawnmower handle to the "fast" position.More items...
Where is the primer button for Craftsman lawnmower?
A lawnmower primer bulb is located on the side of the carburetor, close to or on the air filter. The air filter is positioned on the opposite side of the engine muffler.
Why doesn't my lawn mower have a primer?
Why do lawn mowers need a primer bulb? A lawn mower has a primer bulb because the carburetor is quite small. A carburetor mixes air and gas in the right quantity before injecting it into the combustion chamber on your engine. A small reservoir of fuel collects in the carburetor bowl.
What do you do when your lawn mower won't start?
Your Mower Won't Start:Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten.Dirty Air Filter: Clean or replace.Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas. If this doesn't work, you might need a new fuel filter.
Where is the primer bulb on a Briggs and Stratton?
The primer bulb on a Briggs and Stratton 5 horsepower engine is located on the back of the air filter assembly next to the carburetor. It's a small rubber button-like part that the user must press to start the fuel flow from the gas tank into the carburetor.
How do you prime a carburetor?
Simply cranking the car for 10 - 15 seconds should prime the carb.Crank the car for about 15 seconds.Stop for about 15 seconds.Pump the accelerator petal twice.Crank the car again, if it doesn't start immediately keep cranking the car for a maximum of 15 seconds.More items...•
Do all Toro lawn mowers have a primer bulb?
A self-propelled mulching mower has a primer bulb, but the other Toro 22-inch models do not have that feature.
How does a mower primer work?
How it works:Primer bulb is pressed and released.When released a vacuum is created and fresh fuel is drawn into the intake fuel line.The intake fuel line deposits fuel into the carburetor making it ready or “primed” for combustion.
How to use primer bulbs on a mower?
How To Use The Primer Bulb? Press and release the primer bulbs three times, that’s usually plenty of extra gas to start a cold mower engine. Primer bulbs are basic bits of kit, they commonly suffer from wear and tear, they become perished and mice find them irresistible.
What does a primer bulb look like?
What Does Primer Bulb Look Like? How To Tilt Mower. Report this Ad. The primer bulb on a lawn mower is often brightly colored, red is common but black is pretty common too. Primer bulbs are made from a durable rubber, however they are usually recessed into the air filter housing to protect them from damage.
How is a primer bulb held in place?
The primer bulb is held in place using a plastic keeper ring.
Where is the primer bulb on a lawn mower?
A lawnmower primer bulb is located on the side of the carburetor, close to or on the air filter. The air filter is positioned on the opposite side of the engine muffler.
Why add gas to engine when it's cold?
It’s important to add extra gas when the engine is cold, as cold air is denser and therefor is richer in oxygen. The increased oxygen upsets the fuel ratio, and the fix is to add extra gas. Three basic types of fuel enrichment systems are common, the primer bulb, manual choke plate and auto choke.
Does my mower have a primer bulb?
no primer bulb. If you can’t locate the primer, it is likely your mower doesn’t have one. Your mower may have a manual choke or an auto choke system fitted. As auto choke is only fitted to higher end mowers, manufacturers usually proudly display a badge “Auto Choke”.
Who is John Cunningham?
John Cunningham is an Automotive Technician and writer on Lawnmowerfixed.com. I've been a mechanic for over twenty years, I use my knowledge and experience to write "How to" articles that help fellow gear-heads with all aspects of mechanical repairs, from lawn mowers to classic cars.
Where are primer bulbs on a lawn mower?
They're either directly on the carburetor, or placed at a distance from the carburetor and connected to it with rubber tubing. Once you've gained access to the bulb's housing, remove the screws that hold it in place.
Why is the primer bulb on my lawn mower not priming?
When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. Designed to replace air in the fuel lines and carburetor with gasoline when you depress the button several times, a primer bulb provides a crucial service that makes starting the engine easier.
What happens when a primer bulb is cracked?
A primer bulb that's lost its suppleness doesn't respond as a new one does. The same goes for fuel lines. When they've hardened and cracked, they let in air, which makes it impossible to draw the fuel into the carburetor properly.
Why isn't my fuel line primer working?
When the primer bulb isn't working, it may be a problem with the bulb itself, with the fuel lines that feed fuel to the bulb or both. Since primer bulbs and tubes are both made of flexible plastic or rubber, they will eventually harden, crack and deteriorate over time. A primer bulb that's lost its suppleness doesn't respond as a new one does. The same goes for fuel lines. When they've hardened and cracked, they let in air, which makes it impossible to draw the fuel into the carburetor properly.
How does a mower carburetor feel?
There's a slight resistance when you push it, and you can feel that it's pulling fuel from the gas tank. When it's not working, however, the bulb may refuse to pop back out after you depress it. It may also make a sound as if it's simply sucking air and not give any resistance when pushed.
How to replace a spring and ball in a primer bulb?
If a spring and ball fall out of the primer cavity, replace them, then pop in the new primer bulb. Make sure the tabs line up with the slots before pushing it down. Slide the retainer ring over the primer bulb if applicable, and push it until it locks into place.
Why does my mower leak gas?
Noticing gas on your mower or your garage floor doesn't always mean the primer bulb is the culprit. Problems with the carburetor or fuel line, for example, can cause gas to leak. It could be a worn rubber gasket inside the carburetor or a bad float needle. The fuel line might have a hole or could be clogged with debris.
How to tell if primer bulb is leaking?
Although it's easy to see that the primer bulb is leaking if gas shoots out when you press it, diagnosing the problem isn't always that easy. Sometimes, you notice gas dripping off the lawnmower or puddled underneath, and it's difficult to tell exactly where it's coming from. Wipe down the lawnmower to remove the leaked gas and push the primer bulb several times -- if it's leaking, pressing the bulb can aggravate the problem so you can see gas leaving through or around the bulb. Examining the primer bulb also helps. You might notice cracks or small holes in the bulb, especially when the rubber gets old and brittle.
Why do lawn mowers use primer bulbs?
While many newer lawnmower models eschew the primer bulb in favor of a simpler starter lever, older models often use the primer bulb as part of the cranking process. Over time, exposure damages the primer bulb, causing it to leak gas.
What is the purpose of a primer bulb?
The primer bulb is usually a small, rubber button meant to be pushed with one finger. When you push the bulb, it forces air into the carburetor. The sudden rush of air moves gas through the main carburetor jet, getting it in the right position for combustion when you pull the starter cord.
Step 1
Pull the cover off the air cleaner mounted on the side of the mower engine. In most cases, the air cleaner cover attaches with a small retaining clip. In some cases, you must remove a screw to take off the cover.
Step 2
Take note of the air cleaner positioning inside the air cleaner housing, and then remove the air cleaner from the housing.
Step 3
Squirt a single spray of starter fluid into the hole located in the back of the housing. This forces starter fluid though the carburetor bore and into the bowl.
Step 4
Place the air cleaner back in the air cleaner housing and replace the cover. Do not put the air cleaner into the housing backward. It will restrict airflow. Keep in mind that starter fluid evaporates relatively fast, so speed is important when you're putting the air cleaner and cover back in place.
