John Deere 2305 Problems

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The John Deere 2305 is a well-known service tractor around the world. It is widely known for its functionality, good quality engine, and longevity.

However, like other similar vehicles, it may develop some issues along the line. It is simpler to handle these issues if you have an idea of their causes and possible solutions.

In this article, I outline the common John Deere 2305 problems, their causes, and fixes to help you get your JD 2305 working properly again.

John Deere 2305 Problems, Causes, and Possible Solutions

Before I go into details, here are some common John Deere 2305 problems and their possible solutions.


Possible Solutions 

1. Engine starting problems 
  • Change the spark plug
  • Clean the fuel lines
  • Replace the fuel filter
  • Clean the air filter 
  • Wash the cooling fins
  • Charge/replace the battery
2. PTO problems
  • Cut or replace the PTO shaft
  • Replace solenoid
  • Locate and replace the faulty safety switch
  • Replace the clutch if damaged
3. Transmission problems
  • Replace the transmission fan
  • Fix or repair the idler gear/shaft
  • Top-up transmission oil
  • Replace oil filter
  • Purge the transmission system to get rid of air
4. Engine overheating 
  • Add more engine oil
  • Clean the air filter
  • Wash cooling fins
  • Unclog mower deck
  • Adjust mower cutting height 
  • Sharpen or replace mower blades
5. Electrical problems
  • Clean battery cables and terminals 
  • Charge the battery
  • Repair or replace damaged electrical cables
  • Replace starter motor
  • Replace the battery 

1. John Deere 2305 Engine Starting Problems

One of the most common problems of John Deere 2305 is engine starting difficulties. The engine may refuse to start, start and stop almost immediately, or start and run very slowly and irregularly.

All of these issues have similar causes and you should take your time to troubleshoot and identify the cause of the problem.


  • Worn out spark plug
  • Clogged fuel filter
  • Split/clogged fuel lines
  • Dirty air filter 
  • Dead battery 


First, check the spark plug if the engine is having starting problems. If it is worn out or has carbon build-up on the ends, replace it or clean the plug with a wire brush. 

Also, check to ensure that the spark plug wires are attached firmly to the plug.

The fuel filter and fuel lines may need replacing if the old ones are clogged or damaged. Inspect them carefully and replace clogged ones.

Lack of air supply can result in engine starting difficulty and sudden engine shutdown. Open the air filter housing and clean/replace the air filter if it is dirty or clogged with oil. Then, wash the cooling fins to remove debris and dirt.

Also, a dead engine may be a sign that the battery is dead or producing insufficient voltage. 

Use a multimeter to check the battery voltage. If it is less than 12v, the battery is dead and should be recharged or replaced.

2. John Deere 2305 PTO Problems

Another common problem with the John Deere 2305 is issues with the PTO. The most common complaint was that the rear PTO shaft was too long and caused a lot of mowing problems.

Another PTO issue with the John Deere 2305 was that the PTO sometimes failed to engage resulting in the clutch not engaging or engaging very slowly.


  • PTO shaft too long
  • Damaged solenoid
  • Faulty safety switch
  • Damaged clutch


In the case of a long PTO shaft, you may need to cut the shaft or replace it. Contact a professional small engine technician for assistance.

The PTO failing to engage is usually caused by a damaged solenoid. Test the solenoid with a voltmeter. If it isn’t producing charge, replace it. 

Also, one of the safety switches may be damaged and cause PTO failure. For example, the switch below the seat can get clogged with debris and start malfunctioning. Check all the safety switches and replace any faulty ones.

Finally, the clutch may be damaged if it is not engaging and it will need to be replaced.

3. John Deere 2305 Transmission Problems

John Deere 2305 uses a hydrostatic transmission. Most users complained about issues with the transmission fan and the driveshaft.

The U joints are known to fail due to lack of maintenance and this can lead to numerous issues in the transmission system.


  • Broken transmission fan
  • Damaged idler gear
  • Air contamination
  • Insufficient transmission oil
  • Dirty filter 


The transmission fan should be inspected. If it is broken or damaged, you will need to replace it with a new one.

The idler gear drives from the PTO clutch to the hydraulic pump. The bearings on the idler gear or shaft can fail and the gear would no longer drive the pump as a result. This could result in transmission failure.  

Inspect the idler gear and replace it if it is damaged.

Purge the transmission system to get rid of air that might be interfering with the transmission. 

Also, check the oil level and top it up with the appropriate transmission fluid if it appears to be low. Replace the oil filter if it is clogged or dirty and purge the system after adding new oil.

4. Engine Overheating

The engine of your John Deere 2305 may overheat during mowing operation. If this happens, it could mean that insufficient air or lubrication is causing increased heat and friction in the engine.


  • Low oil level
  • Dirty air filter
  • Dirty cooling fins
  • Engine overload
  • Dull mower blades


Check the oil level with a dipstick and add more oil if it is insufficient. The oil level should always be between the ‘Add’ and ‘Full’ marks before starting your mower.

The air filter and cooling fins may be dirty or clogged if the engine overheats. Start by cleaning or replacing the air filter to allow air into the engine. Then, flush the cooling system or clean the fins and replace the faulty parts.

Putting excess pressure on the engine by cutting very thick, long, or wet grass with a low cutting height can cause the engine to overheat.

Increase the cutting height deck and sharpen the blades if they are bent or blunt.

5. John Deere 2305 Electrical Problems

The electrical problems of John Deere 2305 revolve around the battery, starter, and wiring.

The battery may refuse to charge or charge and run down very quickly, the starter may become faulty, or there might be a short circuit in the wiring.


  • Corroded/loose battery cables and terminals
  • Damaged battery cable harness
  • Low battery voltage
  • Faulty starter motor
  • Incorrectly connected cable
  • Dead battery cells


The battery cables may be corroded or loose if the battery is not sending voltage to the starter. Clean the cables and terminals and tighten them properly.

Check electrical cables for damage and repair/replace them as necessary. 

Use a multimeter to test battery voltage. If it is low(below 12 volts), recharge the battery. If the battery refuses to charge, one or more battery cells may be dead or defective. Replace the battery.

A faulty starter motor will result in electrical and starting problems. Replace the starter.

What Do Majority Of Users Feel About The John Deere 2305?

According to most user reviews and online forums, the John Deere 2305 is a high-quality and dependable model. It is easy to use, has impressive speed, and is also very easy to maintain.

Many customers also claim that John Deere 2305 aims to offer flexible facilities. Additionally, a lot of users think that this John Deere model offers the best after-sale support and assistance in the market.

Most of the complaints were about the PTO shaft and transmission issues which I have talked about and provided solutions to in this article. These issues also occur in other similar vehicles and are usually easy to repair.

Most of these problems can be prevented by carrying out preventive maintenance measures on your mower and keeping it in good working condition at all times.

Frequently Asked Questions 

How much does a John Deere 2305 with a loader weigh?

A John Deere 2305 with a loader weighs about 1450-1865 pounds.

What engine is in a John Deere 2305?

The John Deere 2305 makes use of a 3-cylinder liquid-cooled Yanmar 3TNV756 engine.

What is the horsepower of John Deere 2305?

It has a horsepower of 24.5 PS (18.0 kW; 24.0 HP) at 3,000 rpm.


The John Deere 2305 occasionally develops faults and technical problems, just like every other mower. I have talked about these issues and offered some possible solutions to help you resolve them.

Contact a qualified lawn mower expert if, after following these instructions, you are still unable to fix these issues.

Remember that regular maintenance will extend the lifespan of your mower and prevent the bulk of these issues.