The John Deere X300 Select Series Lawn Tractors are heavy-duty. They are quiet, comfortable, stable on the slopes, easy to ride on rough terrain and in any weather.
They’re known for high-quality cuts even at high speeds and can mow up to 3.5 acres.
John Deere X300 Select Series Lawn Tractors are also versatile—they’re compatible with a variety of attachments—carts, material collection systems, the MulchControl™ kit, and others.
But still… they come with their fair share of problems. Knowing these unique John Deere X300 problems and fixes for various models will save you loads of time, money, and head-scratching.
15 Most Common John Deere X300 Problems and Fixes
1. John Deere X300R Mower deck problems
With the rising fuel prices, you want your lawn tractor to work efficiently and consume less fuel. That’s not too much to ask, is it?
John Deere X300R tractors are notorious when it comes to consuming fuel when they malfunction.
As you’ll discover, the first place to look when this happens to a X300R is the carburetor.
The fix is a carburetor adjustment. You might also want to check the throttle to see if it opens properly.
2. John Deere X300R combustion chamber problems
Failure to clean the combustion chamber to rid it of excess hard carbon deposit from the valve train and piston rings results in build-up.
The deposits cause problems like failures or bad starts and shutdowns. The fix for this is cleaning your tractor’s combustion chamber regularly.
3. John Deere X300R excess fuel consumption problem
A slightly nonfunctional carburetor will cause the engine to consume excess fuel because it will not mix air and fuel in the correct proportions.
You’ll also encounter this problem if your throttle does not open properly. To solve it, adjust your carburetor at the top and make sure your choke cable works perfectly.
4. John Deere X304 Fuel pump problems
This problem develops over time after the fuel pump sensor has stopped being effective. With a faulty sensor, your pump will not be able to regulate oil flow into the carburetor.
As a result, your engine will not get enough fuel to start. You might also have instances where the mower just shuts down.
It’s easy to diagnose and fix a faulty fuel pump. Usually, a stuck solenoid valve is the problem.
Unscrewing the solenoid and then cleaning it up by spraying a carburetor cleaner fixes the problem.
5. John Deere X304 Mower deck problems
A frequent complaint from John Deere x304 users is slipping belts and trouble leveling. This problem arises when you level the mower on an uneven surface.
Apart from leveling the mower on a hard flat surface and choosing the correct cutting height, do tighten the belts or replace them if they’ve seen better days.
6. John Deere X304 engine misses or stops
The main cause of this problem is mostly a broken spark plug, or a wrongly adjusted carburetor. Also, a faulty ignition coil will also cause engine misses or the engine to stop.
To fix these issues, ensure the mower is running on a fully functional spark plug wire, and a well-adjusted carburetor.
7. Transmission problems X370 lawn tractor
A number of users complain about John Deere X370 Lawn Mower transmission problems.
While you can always go to a Deere dealer for repairs if the transmission needs replacing (it’s an expensive affair, you’re looking at spending at least $1,000 on a new transmission).
It’s also possible to fix the problem on your own. Sometimes, the solution is as easy as changing the oil.
8. John Deere X370 Excess vibration or shaking problem
A John Deere X370 could vibrate excessively because of various reasons. This includes damaged engine mounting bolts, debris in the mower, worn out deck belt, bad clutch, spindle bearing damage, unbalanced mower blades, etc.
If your Deere X370 vibrates excessively, stop the engine because you risk permanent damage or ruining an important component. You might end up spending hundreds of dollars trying to fix it.
The fix for this is replacing or fixing loose or missing components, checking to ensure there’s no spindle and blade damage, and ensuring the deck components are in perfect shape throughout the mowing season.
To keep these problems away, try running some checks before mowing and clean it afterwards.
This, together with regular maintenance, will ensure you notice any developing problem and resolve them as soon as possible. A stitch in time saves nine, remember?
9. John Deere X370 steering problems
You’ll find users complaining about steering problems on most forum discussions. They say their X370s won’t turn left or right as expected in the middle of mowing their lawns.
Having problems with steering is rare compared to other X300 Select Series Lawn tractors’ issues. This problem is best handled by a mechanic unless you’re good with the more technical fixes.
10. John Deere x350 engine problems
The most common X350 John Deere Lawn Tractor problem involves the engine. From rough running, to issues with loading, cases of engine overheating, and backfiring, you need to prepare for engine problems.
Luckily, most of the engine fixes are easy, especially if they catch them early.
11. John Deere X350 starting problems
A simple search online brings up cases of X350s with starting issues. Like with every other engine, diagnosing a mower starting problem or an engine not starting at all is not easy.
The possible cause in a Deere X350 could range from the usual suspect (carburetor), to low voltage, air or water being locked in the fuel system, worn out battery terminals, broken wires, etc.
Possible solutions (try troubleshooting the common problems) and fixing them. If you can’t quite put a finger on it, take it to a professional for a more advanced diagnostics test.
12. John Deere X350 rough running
Most of the problems you’ll experience with a X300 John Deere will start and end with the carburetor. A common x300 problem is running rougher than expected.
The fix for this is changing the ignition module. You might also want to check the cooling fan, the choke cable, and ensure your electrical connection is wired correctly.
If you are new to this, don’t DIY. Call an expert.
13. John Deere X310 steering problems
It’s not uncommon for x300 users to struggle with turning the left or right while mowing.
While these cases are few and far between, it’s good to know what to do in the event you encounter this problem.
Unfortunately, this is not an easy fix. It’s rather mechanical because you need to fix small parts in the gears. Trial and error is discouraged.
14. John Deere X310 engine overheating
This is a common problem. It happens whenever the cooling fins are clogged. Constricted airflow raises the engine temperature, resulting in overheating.
Overheating can also affect the steering power. Another thing that’ll make your tractor overheat is not having enough coolant in the radiator.
15. John Deere X310 slipping belt problems
If your X310 lawn tractor has a slipping belt issue, check out if there is debris in the pulley, if the machine is running on a worn-out belt or if there is incorrect tension on the belt.
These three are reasons a belt might slip during operation. The main solution to the issue is cleaning the belt and the pulley or replacing the belt and the pulley.
Frequently Asked Questions About John Deere X300 Problems
How long does a John Deere X300 last?
The John Deere X300 will serve you for up to 10 years—an average of 5,000 mowing hours. However, you can push the time limits of an X300 mower beyond the average lifetime if you perform regular maintenance.
Is a John Deere X300 any good?
Reviews from users of the John Deere X300 series show the X300 Select Series Lawn Tractors are reliable, easy maintenance, versatile and durable. If you want a lawn mower for the long run, the John Deere X300 is a good choice.
How much does a John Deere X300 cost?
The John Deere X300 price depends on the specific model of the X300 Select Series you want. There are different prices for each model and it keeps changing with time.
Your payment plan will also inform the price. You can get a no-interest payment plan if you pay it off for nine months from John Deere dealerships across the USA. You can also choose to pay it off in 60 months with a 4.9% annual interest rate.
The John Deere X300 Select Series Lawn Tractors have their own flaws but they are not a deal breaker. These are problems you can fix if you’re handy and open to challenges.
Users of this tractor series swear by it. From durability to efficiency and user comfort, John Deere X300 Lawn Tractors are an asset. When regularly maintained, a X300 will give you more than 10 years of service.
We hope you get to make the most of your John Deere X300.