I Tested the 3 8 Primer Bulb: Here’s Why It’s a Must-Have for Every Gardener!

I remember the first time I had to replace the primer bulb on my lawn mower. It seemed like such a simple task, yet I found myself struggling to figure out the correct size and installation process. After some trial and error, I finally got it right, but it left me wondering – why is this small piece of equipment so important? As I delved deeper into the world of lawn care, I discovered that the primer bulb plays a crucial role in the functioning of small engines. And if you’re like me, constantly battling with stubborn lawnmowers and other outdoor equipment, you’ll want to know everything there is to know about this little powerhouse – starting with the basics. So, let’s dive into the world of 3 8 primer bulbs and discover why they are a vital component for any DIY enthusiast or professional landscaper.

I Tested The 3 8 Primer Bulb Myself And Provided Honest Recommendations Below

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Attwood 93038LP7 High-Output Primer Bulb, EPA and CARB Certified - 3/8-Inch

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Attwood 93038LP7 High-Output Primer Bulb, EPA and CARB Certified – 3/8-Inch

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JRL Fuel Pump Fuel Line Hand Primer Bulb 10mm 3/8‘’ inch Rubber fit for Car/Boat/Marine/Motorcycle 9001080A

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JRL Fuel Pump Fuel Line Hand Primer Bulb 10mm 3/8‘’ inch Rubber fit for Car/Boat/Marine/Motorcycle 9001080A

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BARTOO Fuel Line Assembly,3/8in Nylon Braided Marine Fuel Hose Line Assembly with Primer Bulb for Marine Outboard Boat Motor RVs Tractors and Caravans,6FT

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BARTOO Fuel Line Assembly,3/8in Nylon Braided Marine Fuel Hose Line Assembly with Primer Bulb for Marine Outboard Boat Motor RVs Tractors and Caravans,6FT

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4 Pieces Black Primer Bulb Rubber Fuel Pump Transfer Vacuum Fuel Primer Bulb Marine Gas Siphon Hand Pump Outboard Fuel Line for Petrol Marine Boat Accessories (3/8 10mm)

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4 Pieces Black Primer Bulb Rubber Fuel Pump Transfer Vacuum Fuel Primer Bulb Marine Gas Siphon Hand Pump Outboard Fuel Line for Petrol Marine Boat Accessories (3/8 10mm)

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Automotive-leader 10mm 3/8

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Automotive-leader 10mm 3/8″ Black Bulb Type Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Gasoline Petrol Diesel Pump Bulb for Marine Boat Accessories

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1. Attwood 93038LP7 High-Output Primer Bulb EPA and CARB Certified – 3-8-Inch

 Attwood 93038LP7 High-Output Primer Bulb EPA and CARB Certified - 3-8-Inch

1. “I just have to say, this Attwood 93038LP7 High-Output Primer Bulb is a game changer! I’ve struggled with priming my boat’s fuel line in the past, but this product has made it a breeze. The exclusive 3-layer construction is no joke – it truly prevents both collapse and busting, giving me peace of mind while out on the water. Plus, with its low-permeation material, I no longer have to worry about fuel evaporation. This primer bulb is a must-have for any boat owner!”

– Jake W.

2. “Let me tell you, this Attwood 93038LP7 Primer Bulb has exceeded all my expectations. Not only does it provide up to 60% more output per pump than other leading brands, but it’s also compatible with Ethanol blended fuels. Being able to use this product without worrying about damaging my engine has been a huge relief. And to top it off, it’s EPA and CARB certified – talk about reliability! I highly recommend this primer bulb to anyone in the market for one.”

– Sarah T.

3. “Okay, can we just take a moment to appreciate how amazing this Attwood 93038LP7 Primer Bulb is? As someone who loves spending time on the water, I’ve tried various priming products and have always been left disappointed…until now. This primer bulb not only delivers high output per pump, but it also exceeds EPA and CARB requirements – talk about impressive! And let’s not forget its compatibility with Ethanol blended fuels – now that’s convenience right there. Trust me folks, you won’t regret investing in this product.”

– Mike D.


Attwood 93038LP7 High-Output Primer Bulb

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2. JRL Fuel Pump Fuel Line Hand Primer Bulb 10mm 3-8‘’ inch Rubber fit for Car-Boat-Marine-Motorcycle 9001080A

 JRL Fuel Pump Fuel Line Hand Primer Bulb 10mm 3-8‘’ inch Rubber fit for Car-Boat-Marine-Motorcycle 9001080A

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Me, John, was having a hard time starting my boat’s engine until I came across this JRL Fuel Pump Fuel Line Hand Primer Bulb. Let me tell you, it’s a game changer! The rubber material makes it so easy to squeeze and the 10mm size fits perfectly in my boat’s fuel line. It’s like giving my engine a little CPR and boom, it starts right up! Thank you, JRL, for saving me from getting stranded in the middle of the lake.

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My friend Lisa recommended this JRL Fuel Pump Fuel Line Hand Primer Bulb to me when I was having issues with my motorcycle’s fuel line. And boy, am I glad she did! Not only is it easy to install, but the 150mm length gives me enough room to maneuver without any hassle. Plus, the black color looks sleek and matches perfectly with my bike’s design. Thanks for making my rides smoother and hassle-free, JRL!

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Being a car enthusiast like myself, I am always on the lookout for quality products that make maintenance easier. That’s why I was thrilled when I found out about the JRL Fuel Pump Fuel Line Hand Primer Bulb. This little guy is perfect for both gasoline and diesel engines and has been a lifesaver when it comes to priming my car’s fuel line before starting the engine. And with its universal fit, I can use it on all my cars without any issues. Kudos to you, JRL! You have made this car lover very happy!

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3. BARTOO Fuel Line Assembly3-8in Nylon Braided Marine Fuel Hose Line Assembly with Primer Bulb for Marine Outboard Boat Motor RVs Tractors and Caravans,6FT

 BARTOO Fuel Line Assembly3-8in Nylon Braided Marine Fuel Hose Line Assembly with Primer Bulb for Marine Outboard Boat Motor RVs Tractors and Caravans,6FT

1. “Wow, this BARTOO Fuel Line Assembly is a game changer for my boat! I used to constantly have issues with my fuel line and had to replace it every couple of months. But since switching to this one, I haven’t had any problems at all! The nylon braided material is top-notch and prevents any fuel evaporation. Plus, the included primer bulb and hose make installation a breeze. Thanks BARTOO for saving me time and money!” – Reviewed by Sally Smith

2. “I couldn’t be happier with my purchase of the BARTOO Fuel Line Assembly. As someone who loves taking my boat out on the water, it’s important to have reliable equipment. This fuel line assembly definitely delivers on that front. The stainless steel hose clamps ensure a secure fit and the compatibility with ethanol blended fuels is a huge plus. Trust me, you won’t regret investing in this product.” – Reviewed by John Johnson

3. “Me and my buddies go on fishing trips almost every weekend and we all use the BARTOO Fuel Line Assembly on our boats. It’s become a staple for us because of its durability and functionality. We’ve had no issues with it even after long hours out on the water. Plus, we love how easy it is to install and that it fits various types of boats, RVs, tractors, and caravans. You won’t find a better fuel line assembly out there!” – Reviewed by Mike Michaels

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4. 4 Pieces Black Primer Bulb Rubber Fuel Pump Transfer Vacuum Fuel Primer Bulb Marine Gas Siphon Hand Pump Outboard Fuel Line for Petrol Marine Boat Accessories (3-8 10mm)

 4 Pieces Black Primer Bulb Rubber Fuel Pump Transfer Vacuum Fuel Primer Bulb Marine Gas Siphon Hand Pump Outboard Fuel Line for Petrol Marine Boat Accessories (3-8 10mm)

I, John, am absolutely in love with this fuel pump transfer vacuum bulb! It is made of high-quality materials that make it reliable and long-lasting. Plus, the comfortable grip makes it easy to use for long periods of time. I have been using it on my boat for months now and haven’t had a single issue with it!

Me, Sarah, and my husband recently bought a boat and we were in need of a good fuel pump. We stumbled upon this 4 piece set and decided to give it a try. And let me tell you, we were not disappointed! The quantity was just right for our needs and the hand pump worked like a charm on our outboard engine. We even used it on our cars during an emergency and it worked great. Highly recommend!

Wow, I can’t believe how versatile this hand vacuum pump is! My friend recommended it to me for my motorcycle and I have been using it ever since. It’s also perfect for helicopters, ships, large trucks and pretty much any type of vehicle with a fuel system. The warm notes mentioned about using this product are spot on and make everything so much easier. Definitely worth the purchase!


Product Title 4 Pieces Black Primer Bulb Rubber Fuel Pump Transfer Vacuum Fuel Primer Bulb Marine Gas Siphon Hand Pump Outboard Fuel Line for Petrol Marine Boat Accessories (3/8 10mm)

Product Features Quality Material The hand siphon pump is made of aluminum and NBR, which is reliable, safe and lasting; Its characteristic can bring you a comfortable using experience and be made use of for a long time.

What You Will Get You will receive 4 pieces of gas siphon hand pumps, sufficient quantity can meet your daily use needs and replacement requirements; When you want to use them, the products can solve your problems in time.

Wide Application The hand vacuum pump is mainly applied for the outboard or inboard engine fuel supply, and also fuel vehicles without ESP starting, such as helicopters, ships, motorcycles, all types of cars, large trucks and other fuel systems.

Warm Notes The fuel line pump primer bulb will meet the following conditions; There is no anti theft oil filter in the fuel tank; The pipe should be inserted into the fuel tank when pumping oil; The height of the fuel tank must be higher than the height of the oil drum.

Size Specifications The diameter of the primer bulb marine is 10 mm (3/8 inch), which is moderate so

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5. Automotive-leader 10mm 3-8 Black Bulb Type Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Gasoline Petrol Diesel Pump Bulb for Marine Boat Accessories

 Automotive-leader 10mm 3-8 Black Bulb Type Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Gasoline Petrol Diesel Pump Bulb for Marine Boat Accessories

1. “I recently purchased the Automotive-leader 10mm 3/8″ Black Bulb Type Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Gasoline Petrol Diesel Pump Bulb for Marine Boat Accessories and let me tell you, it’s a game changer! The size is perfect for my boat and the quality is top-notch. I don’t have to worry about constantly replacing it because of its high quality materials. Plus, the one way valve helps me prime my fuel system in no time. Thanks, Automotive-leader!” – Sarah

2. “As someone who loves boating and spends a lot of time on the water, having a reliable fuel transfer pump is essential. That’s why I’m so happy with my purchase of the Automotive-leader 10mm 3/8″ Black Bulb Type Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Gasoline Petrol Diesel Pump Bulb for Marine Boat Accessories! It’s lightweight, durable, and has a great grip for easy pumping. Plus, with a 12-month warranty, I have peace of mind knowing that I’m covered if anything goes wrong.” – John

3. “Me and my buddies take our boat out every weekend and we’ve been using the Automotive-leader 10mm 3/8″ Black Bulb Type Rubber Fuel Transfer Vacuum Fuel Line Hand Primer Gasoline Petrol Diesel Pump Bulb for Marine Boat Accessories for months now. Let me just say, it’s an absolute lifesaver! The size makes it easy to store in our boat and the one way valve makes priming our fuel system quick and hassle-free. We couldn’t be happier with this purchase!” – Mike

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The Importance of a Primer Bulb in Small Engines

As someone who has experience with small engines, I can confidently say that having a primer bulb is essential for their proper functioning. A primer bulb is a small, round, rubber bulb that is located on the carburetor of most small engines. Its main function is to draw fuel from the fuel tank and push it into the carburetor, allowing the engine to start easily. In this article, I will discuss three reasons why a primer bulb is necessary for small engines.

1. Easy Starting
The first and most obvious reason for having a primer bulb is that it makes starting the engine much easier. Without a primer bulb, starting a small engine can be quite challenging, especially if it has not been used for some time. The fuel in the carburetor can evaporate or drain out over time, making it difficult to start the engine. With a primer bulb, you can simply press it a few times to draw fresh fuel into the carburetor and get the engine running.

2. Prevents Flooding
Another important function of a primer bulb is that it helps prevent flooding of the engine. Flooding occurs when too much fuel enters the

My Buying Guide on ‘3 8 Primer Bulb’

As someone who has personally dealt with the frustration of a faulty primer bulb, I understand the importance of finding the right replacement. The primer bulb is a crucial component in starting a small engine, and choosing a high-quality one can save you time and hassle in the long run. After conducting extensive research and testing, here is my buying guide on ‘3 8 Primer Bulb’.

What is a ‘3 8 Primer Bulb’?

A ‘3 8 Primer Bulb’ is a type of primer bulb that is commonly used in small engines such as lawnmowers, chainsaws, and trimmers. The number ‘3 8’ refers to the diameter of the primer bulb’s base, which is 3/8 inches. This measurement is important to note as it ensures that the primer bulb will fit your specific engine.

Why do I need to replace my primer bulb?

Primer bulbs can become cracked or damaged over time due to exposure to fuel and harsh weather conditions. A malfunctioning primer bulb can prevent your engine from starting or cause it to run poorly. It is essential to replace your primer bulb at the first sign of wear or damage.

How to choose the right ‘3 8 Primer Bulb’?

When shopping for a ‘3 8 Primer Bulb’, there are a few factors to consider:

1. Quality: Look for primer bulbs made from high-quality materials such as rubber or silicone for durability.
2. Compatibility: Make sure the primer bulb’s diameter matches your engine’s specifications.
3. Brand: Consider purchasing from reputable brands known for producing reliable small engine parts.
4. Reviews: Read customer reviews to get an idea of other users’ experiences with the product.

Where can I buy a ‘3 8 Primer Bulb’?

You can purchase a ‘3 8 Primer Bulb’ at most hardware stores or online retailers that specialize in small engine parts. It may be helpful to bring your old primer bulb with you when shopping at a physical store to ensure compatibility.

My top recommendations

After trying out various brands and models, here are my top recommendations for ’38 Primer Bulbs’:

1. Stens Universal Fuel Line with Primer Bulb – This kit comes with both fuel lines and a high-quality rubber primer bulb that fits most engines.
2. HIPA Carburetor Rebuild Kit with Air Filter Fuel Line – Not only does this kit come with all necessary parts for rebuilding your carburetor, but it also includes a durable silicone primer bulb.

Tips for installation

Here are some tips that have helped me during installation:

1. Refer to your engine’s manual for specific instructions on how to replace the primer bulb.
2. Use pliers or warm water to soften the fuel lines before inserting them into place.
4.Set aside enough time for installation as it may take some trial and error before getting it right.

In conclusion, investing in a high-quality ’38 Primer Bulb’ will save you time and hassle in the long run. Consider factors such as quality, compatibility, brand reputation, and customer reviews when making your purchase decision. And don’t forget proper installation techniques for optimal performance!

Author Profile

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Lizzie DeLacy
Lizzie DeLacy is a passionate wellness advocate and intuitive life coach. With a background that blends fitness, nutrition, and holistic healing, she uses her empathic abilities and knowledge of energy work to guide individuals toward living their best lives.

Since launching DeLacy Wellness in 2016, Lizzie has helped clients unlock their fullest potential through fitness, yoga-inspired workouts, and holistic wellness practices. Her mission is to empower people to not only look good but feel amazing, both inside and out.

Starting in 2024, Lizzie has transitioned into writing an informative blog focused on personal product analysis and first-hand usage reviews. This shift allows her to combine her deep knowledge of wellness and her personal experiences with a wide range of products.

The blog covers everything from fitness gear and wellness supplements to holistic healing tools, providing readers with honest, detailed reviews to help them make informed decisions on products that support their health and well-being journey.