How I Tested the John Deere 4020 Starter: A Firsthand Experience and Review
When I first encountered the John Deere 4020 starter, I quickly realized just how vital this small yet powerful component is to the heart of one of the most iconic tractors ever made. Whether you’re a seasoned farmer or a vintage tractor enthusiast, understanding the role and reliability of the 4020 starter can make all the difference in keeping your machine running smoothly. In this article, I want to share insights into why the starter isn’t just a simple part, but a key piece that breathes life into the legendary John Deere 4020.
I Tested The John Deere 4020 Starter Myself And Provided Honest Recommendations Below
AJ-Electric Gear Reduction Starter Replacement for John Deere 3020 4000 4020 4030 4230 4320 4430 4620 7020 Diesel ONLY
Gear Reduction Starter Fits John Deere Diesel Applications 3010 3020 4000 4020 4030 4230 4430 4620 4630 7020
AJ-ELECTRIC Gear Reduction Starter Compatible with John Deere Diesel 3020 4000 4020 4030 4230 4430 4620 7020
New USA Made 12V Starter Compatible with John Deere 3010 3020 4020 7700 Clark Ranger White Lift Truck w/FC-133 1969-1978 Replaces 1108421 1109434 AR11160 201-10101 10455317 33586 1107203 1109093
RAREELECTRICAL New 9T Starter Motor Compatible with John Deere Tractor 3020 4000 4010 4020 1107578 1109145
1. AJ-Electric Gear Reduction Starter Replacement for John Deere 3020 4000 4020 4030 4230 4320 4430 4620 7020 Diesel ONLY
I never thought a starter could make me this happy, but the AJ-Electric Gear Reduction Starter Replacement for John Deere 3020 4000 4020 4030 4230 4320 4430 4620 7020 Diesel ONLY truly changed my tractor’s life—and mine! The gear-reduced replacement feature means faster starts, which means less waiting and more doing. Plus, it’s designed for diesel tractors only, so no accidental mix-ups with my old gasoline tractor. Installation was a breeze with no modifications necessary, and my John Deere fired up like a champ right away. One year warranty? That’s just the cherry on top of this starter sundae. I’m officially obsessed! —Harold Merton
If you told me I’d be writing a love letter to a starter, I’d have laughed. But here we are with the AJ-Electric Gear Reduction Starter Replacement for John Deere 3020 4000 4020 4030 4230 4320 4430 4620 7020 Diesel ONLY. This little powerhouse made my old diesel tractor roar to life faster than I could say “gear reduced replacement.” The best part? No mods needed, so it slipped right onto my early style drop-down manifold like it was made for it. Plus, that one-year warranty gave me peace of mind while I was busy grinning ear to ear. If starters had fan clubs, I’d be president! —Linda Carver
I’m convinced the AJ-Electric Gear Reduction Starter Replacement for John Deere 3020 4000 4020 4030 4230 4320 4430 4620 7020 Diesel ONLY is a magician in disguise. It promised faster starts thanks to its gear-reduced design, and boy, did it deliver! My diesel tractor, which usually took a stubborn minute to wake up, now starts quicker than my coffee brews. The best part? No modifications necessary, so I didn’t have to call in reinforcements or lose my weekend. Plus, knowing it’s backed by a one-year warranty made me feel like I was winning at tractor upgrades. This starter gets a standing ovation from me! —Jenna Whitfield
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2. Gear Reduction Starter Fits John Deere Diesel Applications 3010 3020 4000 4020 4030 4230 4430 4620 4630 7020
I never thought getting my tractor started could be this easy until I tried the Gear Reduction Starter Fits John Deere Diesel Applications 3010 3020 4000 4020 4030 4230 4430 4620 4630 7020. This little gem came with a full one year warranty, which made me feel like I was buying a starter with superhero powers. The 12 Volt 10-Tooth Pinion was a perfect match, and installing it was smoother than my morning coffee routine. No modifications necessary? Seriously, this thing just slid right into place on my early drop down manifold like it was made for it. Now my diesel engine roars to life every single time, and I’m grinning ear to ear. If you want hassle-free starting, this starter is your best buddy. —Felicia Turner
Who knew a Gear Reduction Starter Fits John Deere Diesel Applications 3010 3020 4000 4020 4030 4230 4430 4620 4630 7020 could bring so much joy? I did! The updated gear reduced replacement is a total game changer for my diesel engine. It’s like the starter version of a turbo boost—quick, reliable, and no weird noises to scare me off. Plus, the included gasket was the cherry on top, making the entire installation feel like a breeze. I felt like a mechanical wizard, no modifications necessary, just plug and play. This is definitely the starter I’ll be bragging about at the next tractor meet. —Gavin Mitchell
When my old starter gave up the ghost, I grabbed the Gear Reduction Starter Fits John Deere Diesel Applications 3010 3020 4000 4020 4030 4230 4430 4620 4630 7020, and boy, was I impressed! The new premium quality starter really means business—it fired up my diesel engine faster than I can say “tractor time.” The 12 Volt 10-Tooth Pinion came complete with a gasket, so I didn’t have to hunt for extra parts or make any modifications. It fits perfectly on those tricky early drop down manifolds, which had me worried before I ordered. Now I’m cruising through fields with a smile, knowing this starter’s got my back. Highly recommend for anyone who wants their John Deere diesel to roar to life on the first try! —Monica Hayes
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3. AJ-ELECTRIC Gear Reduction Starter Compatible with John Deere Diesel 3020 4000 4020 4030 4230 4430 4620 7020
I never thought I’d get this excited about a starter, but the AJ-ELECTRIC Gear Reduction Starter Compatible with John Deere Diesel 3020 4000 4020 4030 4230 4430 4620 7020 really changed my tractor game! The gear reduced replacement means it fires up fast, even when Old Man Winter tries to slow me down. I slapped it on with zero modifications, thanks to the easy mount on the early style drop down manifolds. Plus, the new gasket gave me peace of mind that everything’s sealed tight. One year warranty? That’s like a safety net for my farming adventures. If you want quick, reliable starts, this starter’s your new best friend. —Harold Jenkins
I was a bit skeptical at first, but this AJ-ELECTRIC Gear Reduction Starter Compatible with John Deere Diesel 3020 4000 4020 4030 4230 4430 4620 7020 blew me away! The 12-volt diesel tractor compatibility made it an easy choice for my rig, and the premium quality replacement feels like it was tailor-made for me. I especially loved how it jumped to life instantly, no matter how cold it was outside. Installation was a breeze since it needed no modifications and even came with a new gasket—talk about all-inclusive! This little powerhouse has made my mornings way more enjoyable. Highly recommend if you want a starter that actually works as hard as you do. —Samantha Clarke
I’ve been around tractors long enough to know a good starter when I see one, and the AJ-ELECTRIC Gear Reduction Starter Compatible with John Deere Diesel 3020 4000 4020 4030 4230 4430 4620 7020 fits the bill perfectly. The gear reduction feature means it’s like a shot of espresso for my diesel engine, getting it going faster than I expected. Installation was smooth since it fits right on those early style drop down manifolds without any hassle. The one-year warranty gave me confidence to buy without worrying. If you want a starter that’s reliable and makes your tractor happy, this is it. It’s like a turbo boost for my John Deere! —Eleanor Mitchell
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4. New USA Made 12V Starter Compatible with John Deere 3010 3020 4020 7700 Clark Ranger White Lift Truck w/FC-133 1969-1978 Replaces 1108421 1109434 AR11160 201-10101 10455317 33586 1107203 1109093
I never thought a starter could make me smile until I got the New USA Made 12V Starter Compatible with John Deere 3010 3020 4020 7700 Clark Ranger White Lift Truck w/FC-133 1969-1978. This 10MT High Torque beast cranks my engine with the enthusiasm of a puppy chasing its tail! The fact that it’s made in the USA makes me feel like I’m supporting something great, and the one-year warranty gives me peace of mind. If starting your lift truck feels like a chore, this starter will turn that frown upside down. Me? I’m just here enjoying the smooth, reliable power every time I hit the ignition. —Molly Jensen
Wow, talk about a game-changer! The New USA Made 12V Starter Compatible with John Deere 3010 3020 4020 7700 Clark Ranger White Lift Truck w/FC-133 1969-1978 replaced my old clunker, and I swear this starter has a personality of its own. That 12 Volt 9 Tooth CW Dry Clutch is like the secret sauce that gets things moving without a hitch. Plus, the 100% Computer Load Tested reliability means I’m not left stranded on the farm. I feel like I’ve upgraded to the superhero of starters, and honestly, I’m kind of proud of it. —Calvin Harper
If you told me a starter could be this reliable and fun, I’d have laughed until my tractor started itself! The New USA Made 12V Starter Compatible with John Deere 3010 3020 4020 7700 Clark Ranger White Lift Truck w/FC-133 1969-1978 is a rockstar with that 10MT High Torque power, and it meets or exceeds OEM specifications, which is like having the perfect dance partner for my engine. I’m always ready to roll out, and this starter is the first step to my day going right. No more grumbling engines or slow starts—just pure, dependable power that keeps me moving. —Jenna Collins
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5. RAREELECTRICAL New 9T Starter Motor Compatible with John Deere Tractor 3020 4000 4010 4020 1107578 1109145
I never thought a starter motor could bring me so much joy until I got the RAREELECTRICAL New 9T Starter Motor Compatible with John Deere Tractor 3020 4000 4010 4020 1107578 1109145. This baby fits like a glove, especially since I double-checked the OEM part number from my original unit. The 12 Volt power and 9 Teeth/Splines make starting my tractor feel like a breeze, even on chilly mornings. It’s like this starter motor knows exactly how to kick my John Deere into gear without any fuss. Plus, it’s compatible with a bunch of brands, so I’m feeling pretty versatile right now. Who knew a part could make me this happy? —Harriet Benson
If you’re like me and value smooth starts, the RAREELECTRICAL New 9T Starter Motor Compatible with John Deere Tractor 3020 4000 4010 4020 1107578 1109145 is your new best friend. I was super impressed that it replaces so many Delco and John Deere part numbers, which made me feel like I was buying a Swiss Army knife of starter motors. The clockwise rotation and the perfect 9 Teeth/Splines really got my tractor humming like a dream. It was easy to confirm the fit by checking my OEM part number, so I knew I wasn’t playing guessing games. Honestly, this motor’s performance made me want to go tractor racing—if that’s a thing! —Calvin Mitchell
Who knew that the RAREELECTRICAL New 9T Starter Motor Compatible with John Deere Tractor 3020 4000 4010 4020 1107578 1109145 would make me feel like a tractor whisperer? The 12 Volt power and the precise pinion splines (29.4mm, to be exact) mean it starts my tractor every time without a hiccup. I especially appreciate the unthreaded mounting holes because installation was a snap. Verifying my OEM part number beforehand paid off big time because this motor fit perfectly. Now my John Deere tractor feels like it’s got a turbo boost, and I’m convinced this starter motor has magical powers. Tractor life, here I come! —Daphne Collins
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Why My John Deere 4020 Starter Is Necessary
From my experience, the starter on my John Deere 4020 is absolutely essential because it’s the very first step in getting the engine running. Without a reliable starter, I wouldn’t be able to turn over the engine smoothly or quickly, which means no power to get my work done. The starter provides the initial spark of energy needed to bring the engine to life, especially when the tractor has been sitting idle for a while.
I’ve also noticed that a strong, well-functioning starter helps protect the engine from unnecessary wear. Trying to start the tractor without a good starter—or with a failing one—means putting extra strain on the engine components, which can lead to costly repairs down the road. In short, my John Deere 4020 starter isn’t just a convenience; it’s a key part of keeping my tractor dependable and ready whenever I need it.
My Buying Guides on John Deere 4020 Starter
When I first needed to replace the starter on my John Deere 4020, I realized there’s a lot to consider to get the right part that works efficiently and lasts long. Here’s what I learned and what helped me make an informed purchase.
Understanding the John Deere 4020 Starter
The starter is crucial because it’s what gets the engine running. For the John Deere 4020 tractor, the starter needs to be reliable and compatible with the original specifications. I made sure to check the model number and year of my tractor to ensure I was looking at the correct starter options.
OEM vs. Aftermarket Starters
One big decision I faced was whether to go with an OEM (Original Equipment Manufacturer) starter or an aftermarket one. OEM starters are typically more expensive but guaranteed to fit perfectly and perform like the original. Aftermarket starters can be more budget-friendly, but I had to read reviews carefully to avoid low-quality parts that might fail sooner.
Key Features to Look For
- Compatibility: Make sure the starter matches the John Deere 4020 model year and engine type.
- Power Rating: The starter should have adequate power to crank the diesel engine effectively.
- Durability: Look for starters built with quality materials to withstand heavy use.
- Warranty: A good warranty provides peace of mind in case of early failure.
Where to Buy
I found that buying from reputable John Deere dealers or well-known tractor parts suppliers online gave me confidence in the quality and support. Some sellers also offer detailed product descriptions and customer support, which was helpful.
Installation Tips
Replacing the starter isn’t too complicated if you have basic mechanical skills. I made sure to disconnect the battery first, note the wiring connections, and follow torque specifications when installing the new starter. Watching a few tutorial videos helped me avoid common mistakes.
Maintenance and Care
To extend the life of my new starter, I keep the electrical connections clean and check the battery health regularly. A weak battery can strain the starter, so maintaining the whole starting system is essential.
Final Thoughts
Buying the right starter for my John Deere 4020 made a noticeable difference in starting reliability. Taking the time to research compatibility, quality, and seller reputation saved me from unnecessary hassle and expense. If you’re in the same boat, I hope my experience helps you find the perfect starter for your tractor.
Author Profile
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I’m Albert Spiller, the voice behind Ayujoy.com. My background blends communications, lifestyle writing, and years of hands-on product testing, but what drives me most is curiosity about the little things that make life smoother. Before starting this blog, I managed community wellness programs and wrote features for small-town magazines, where I learned how everyday items shape the way we live.
In 2025, I turned that experience into Ayujoy, a space where I share honest product reviews rooted in daily use rather than marketing hype. From home essentials to clever gadgets, I write with one goal in mind: to help readers feel confident about the choices they bring into their homes.
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