Your lawn mowers engine primer bulb is fond of the carburetor. This small bulb, when pushed in, forces a small quantity of fuel into the carburetor. Without this first fling, the mower would not start. When you pull the mower first-course rope, the gasoline that you pumped into the carburetor with the primer feeds the mower engine establish. Then the power of the vacuum cleaner sucks more gasoline into the carburetor while the mower is running. A Craftsman lawn mower primer bulb is a supple, thumb-sized plastic bubble that can break over time. At some point, the primer bulb will need to be reinstated. The materials you’ll need for a Craftsman lawn mower primer are obtainable at hardware stores and cost just a few dollars.
You don’t need heavy equipment to perform this simple replacement. All you need is a pair of flathead screwdrivers, a pair of needle-nose pliers, and a new primer bulb that needs to be installed in place of the old one. This will help you if you have a 17mm grip.
Perform the initial steps:
Before replacing the Toro primer bulb, you must ensure that the mower engine is cool. If you have just started the replacement after a cutting session, allow the machine to cool for 15-20 minutes, as the hot motor could damage your skin to the touch.
It is also best to replace the Toro engine’s spark plug wire before starting to remove the primer bulb. This step is done as a precaution to prevent the engine from accidentally starting.
Locate the primer bulb:
The primer bulb is located right next to the carburetor. On some Toro models, it may be present under the carburetor. A primer pear is usually red or black/brown in color. Usually, most primer bulbs have red or black retaining rings. Some bulbs do not have a retaining ring.
Visually inspect the primer bulb to see if it appears to be intact or not. If you notice that it is broken, it could be the reason why you cannot prime the engine and therefore the bulb needs to be replaced with a new one.
Remove the Toro primer bulb from the carburetor:
Primer removal can be done by following these two steps:
Removal of the retaining ring:
First, remove the retaining ring that secures the Toro primer bulb to the outside. The ring is easily detached by hand. Otherwise, you need to use a flathead screwdriver to remove it.
Removing the clip:
A clip that acts as a lamp holder secures the bulb inside. After removing the retaining ring, you may be able to see a few grooves on either side of the bulb. You need to insert a flathead screwdriver on each side to remove the clip that holds the bulb.
Removing the bulb:
The clip is secured with your teeth. When inserting the screwdriver, the teeth are released from the slot, and as a result, the clip comes out with the bulb. If you have difficulty removing the clip, remove the bulb at the same time with a pair of needle-nose pliers. If the Toro primer bulb is faulty, you don’t need to be so careful as it will eventually be replaced. However, it would be best to be careful with a working primer bulb and not end up poking it with the needle-nose pliers.
Install a new bulb:
The faulty primer bulb has now been removed. In this step, you need to connect the new bulb that you purchased from the dealer for your particular Toro model. If you do not know the model of the device, take the defective bulb with you and the dealer will provide you with a new, identical one.
Clean the bulb accessory:
Dirt deposits may have formed at the bulb connection point. These deposits can develop on the carburetor if not cleaned properly. To dislodge them, use a dry cloth to thoroughly clean the area. If available, it is even better to use a carbohydrate cleaner to clean the attachment.
Put the bulb in the clip:
Secure the new primer bulb to the clip in its correct location so that the tabs face up, i.e. in the direction of the bulb.
Refit the bulb in the carburetor:
Insert the bulb into a 17mm socket so that it fits snugly with the clip on the outside of the socket. Although it can be done by hand, a grip makes the job easier. Ensures bulb and clip are properly sealed, preventing any leakage problem.
Tap the take in the attachment and watch the clip click. This indicates that the bulb is correctly installed. Then remove the bulb socket.
Replace the retaining ring:
If your device uses a snap ring, pin it to the outside of the bulb to secure it completely.
Inspect the new bulb:
Once the new bulb is installed, gently push it down and watch for fuel entering the carburetor. You may hear a slight noise from fuel flowing into the carburetor when the bulb is pushed in. Since the bulb is now working perfectly, try pulling on the cord on your Toro lawn mower and see if it lights up this time.
It is not necessary to start the mower with the primer bulb if the mower has been running recently, as there should still be gasoline in the throttle. If the mower is hot, try starting it without using the primer bulb.
Frequently Asked Questions:
Can you replace the primer on a lawnmower?
Primer bulbs with cracks from age or sun exposure will not push air and gas into the mower to ignite it. You can successfully replace your lawn mower primer bulb in no time, with few tools and at a very low price.
Why doesn’t my lawn mower have a primer bulb?
Your new lawnmower is equipped with an automatic choke system. You don’t need a primer. The engine should start with a few pulls on the rope. This is something quite new.
Why does my lawnmower only run for a few seconds and then turn off?
If your mower starts, runs briefly, and then stops, here are the four most common reasons why this happens: Dirty carb / clogged carb bowl. Old gasoline went bad. Dirty or defective spark plugs
What Does It Mean When Your Lawn Mower Cord Won’t Pull?
If you overfill the sump with oil or store the mower so that it rests on the front wheels, oil can seep into the piston cylinder and restrict piston movement. When the piston cannot move, the crankshaft cannot turn and the rope cannot be pulled.