A primer bulb is a small, rubber bulb attached to a fuel line on a small engine like a lawnmower, snowblower, or chainsaw. It is designed to draw fuel from the tank and push it into the carburetor. Primer bulbs can become cracked over time due to age, wear and tear, and inadequate maintenance. In this blog, we will discuss cracked primer bulb symptoms, causes, diagnosing and replacing the bulb.
Symptoms of a cracked primer bulb
- Bulb not getting hard in time: If the primer bulb does not get hard within a few pumps, it could be a sign of a fuel leak on the engine side. This is because air is escaping through the crack in the bulb instead of creating suction.
- Bulb getting flat when fuel is running: If the primer bulb gets flat when fuel is running, it could be a sign of fuel restriction. This means that fuel is not able to flow through the crack in the bulb, causing it to collapse. In either situation, the primer bulb is not functioning properly and should be inspected.
How to troubleshoot a cracked primer bulb
- Inspect the carburetor bulb for cracks: The first step in troubleshooting a cracked primer bulb is to inspect it for cracks. This can be done by visually examining the bulb for any signs of damage, such as cracks or holes on the face of the bulb. If a crack is found, it is likely that the primer bulb is the cause of the problem.
- Replace the cracked primer bulb: Once a crack is identified, the primer bulb should be replaced. This can be done by following the owner’s instructions or watching a video tutorial to ensure proper installation. It is important to use a high-quality replacement bulb to ensure that the problem does not reoccur.
Causes of a Cracked Primer Bulb
Inadequate maintenance can lead to premature failure of the primer bulb. Primer bulbs should be inspected regularly and replaced if they show signs of wear or damage. Age and use of the primer bulb can also cause it to become cracked over time.
Diagnosing a Cracked Primer Bulb
If you suspect that the primer bulb on your small engine is cracked, there are several steps you can take to diagnose the issue. The first step is to check the fuel lines for any cracks or leaks. If there are any cracks or leaks, they should be repaired before proceeding. Next, test the fuel pressure to ensure that the engine is able to draw sufficient fuel from the tank. Finally, inspect the primer bulb for any cracks or damage.
Replacing a Cracked Primer Bulb
If the primer bulb is cracked, it should be replaced immediately. First, remove the old primer bulb from the fuel line. Clean the fuel line and remove any debris that may have accumulated. Next, install the new primer bulb and secure it to the fuel line. Finally, test the new primer bulb to ensure that it is working properly.
Primer bulbs should be regularly inspected for signs of wear and tear. If the bulb is cracked, it should be replaced immediately to ensure that the engine is able to start and run properly. By regularly inspecting and replacing the primer bulb, you can help prevent serious engine damage and ensure the long-term performance of your small engine.
Primer bulbs should be replaced when they show signs of wear or damage. It is also a good idea to replace the bulb every few years, as age and use can cause it to become cracked over time.
The most common symptom of a cracked primer bulb is difficulty in starting the engine. Other symptoms include low fuel pressure and cracks or leaks around the primer bulb.
To diagnose a cracked primer bulb, you should check the fuel lines for cracks and leaks, test the fuel pressure, and inspect the primer bulb for any cracks or damage.
If you don’t replace a cracked primer bulb, the engine may not start or run properly. This can lead to serious engine damage if left unchecked.
To replace a cracked primer bulb, you should first remove the old bulb from the fuel line. Clean the fuel line and remove any debris that may have accumulated. Next, install the new primer bulb and secure it to the fuel line. Finally, test the new primer bulb to ensure that it is working properly.