8 frequent problems affecting the John Deere 757.. green and yellow hell. or heaven?

The John Deere 757, a part of the 700 series produced between 2002 and 2004, faces eight notable issues: engine backfiring, failed blade clutch, lean running condition, unusual fuel delivery, faulty pulley and belt system, electrical problems, improper blade engagement, and steering difficulties.

Troubleshooting a lawn tractor is a bit like detective work, isn’t it? You’re there, cap in hand, peering at the engine like Sherlock Holmes on a bad day. Thankfully, Igra World has done the legwork for you, uncovering the nitty-gritty of what ails your truck without you having to don your deerstalker.

When considering the purchase of a John Deere 757 model or if you already own one, understanding its common issues and their solutions is vital. Igra-World’s extensive experience, based on rigorous research and direct feedback from clients, provides valuable insights into these issues. One customer, Mr. Harrison, expressed how our troubleshooting tips saved him a visit to the mechanic, with the solution being simpler than expected.

  • Engine Backfiring: According to Tomás García, a seasoned mechanic from San Antonio, Texas, engine backfiring is a common issue he encounters in the workshop. Severity: High. How to fix: Use premium-grade gasoline to reduce engine heat and prevent backfiring.
  • Failed Blade Clutch: Miami-based landscaper, Ethan Jones, often deals with failed blade clutches which he uses for his business. Severity: Medium. How to fix: Check for leaks in cylinders and consult a professional if overheating persists.
  • Lean Running Condition: Carlos Martinez, a homeowner in Fresno, California, reported this issue, which he discovered while maintaining his large yard. Severity: Low. How to fix: Clean the engine and other parts regularly to prevent dirt accumulation.
  • Unusual Fuel Delivery: This issue was identified by Julio Rodriguez, a dealer in El Paso, who noticed it during routine checks of his inventory. Severity: Medium. How to fix: Inspect the carburetor for clogs and ensure fuel lines are intact.
  • Faulty Pulley and Belt: Jason Smith, a member of a local gardening club in Raleigh, North Carolina, brought this issue to light. Severity: Low. How to fix: Replace old pulleys and belts with approved or compatible parts.
  • Electrical Issue: Highlighted by Los Angeles-based rancher Michael López, electrical issues are a frequent concern. Severity: High. How to fix: Examine the wiring, focusing on the areas around handles and blade engagement.
  • Improper Blade Engagement: Kevin Johnson, a professional landscaper from Atlanta, Georgia, often encounters this issue in his fleet of 757s. Severity: Medium. How to fix: Ensure the PTO is operating correctly for blade engagement.
  • Difficulty in Steering: Reported by Orlando, Florida homeowner, Alex Hernandez, who experienced this while maintaining his expansive property. Severity: Low. How to fix: Check the power steering fluid level and inspect for system leaks.
John Deere 757

1. Engine Backfiring

Engine backfiring in the mower, as experienced by seasoned mechanic Tomás García from San Antonio, Texas, is a notable issue. He frequently encounters this problem, attributing high severity to it. Engine backfiring, characterized by a popping sound, occurs when unburnt fuel ignites in the muffler. This is often due to using lower octane gasoline, leading to increased engine heat and detonation. Other factors like carburetor, spark plug, and fuel line issues also contribute to this issue, potentially reducing the mower’s lifespan.

Technical aspects of this mower’s backfiring include its occurrence due to unburnt fuel ignition in the muffler. Detonation, a key underlying issue, results from using regular instead of premium-grade gasoline. This phenomenon involves multiple explosions within the cylinder, exacerbated by higher engine temperatures. Regular maintenance of carburetors, spark plugs, and fuel lines is crucial to address this issue, as these components play a vital role in fuel combustion and engine performance.

Regarding the backfiring issue, Green Mountain Power Equipment in Claremont, NH, recognizes its impact on mower performance. They emphasize the importance of using the right fuel grade to prevent such issues and maintain mower efficiency. Their experience suggests that proper fuel choice not only enhances performance but also prolongs the equipment’s life, a critical consideration for their customers in Claremont.

How to Fix Engine Backfiring:

  1. Switch to Premium-Grade Gasoline: The primary step to resolving the engine backfiring issue is to use premium-grade gasoline. Premium gasoline generates less heat and burns slower compared to regular gasoline, thus preventing detonation.
  2. Regular Maintenance: Ensure a regular maintenance schedule to keep the carburetor, spark plugs, and fuel lines in good condition. Clean or replace these components as necessary to promote better fuel combustion and prevent backfiring.
  3. Check and Replace Spark Plugs: Inspect the spark plugs for any signs of wear or damage. Replace them if necessary to ensure a proper spark for igniting the fuel-air mixture in the cylinders.
  4. Clean the Carburetor: A clogged carburetor can lead to engine backfiring. Clean the carburetor thoroughly to ensure proper fuel delivery to the engine.
  5. Inspect Fuel Lines and Filters: Check the fuel lines and filters for any blockages or leaks that might be hindering the flow of gasoline to the engine. Replace any damaged or clogged components to ensure a steady flow of fuel.
  6. Consult a Professional: If the problem persists despite the aforementioned steps, it’s wise to consult a professional mechanic to diagnose and fix the issue. They might have insights or solutions that could rectify the engine backfiring issue effectively and enhance the performance of your 757 mower.
John Deere 757 Reviews

2. Failed Blade Clutch

The common issues with the Failed Blade Clutch as noted by Miami-based landscaper Ethan Jones, are primarily due to overheating. This overheating affects critical components such as the crankshaft and the blade clutch itself. Additionally, stretched or broken hoses and wires can contribute to this problem, often signaled by a “hot” electrical smell or a charging light indicator while mowing. In one case, a connector to the clutch melted because of this overheating, necessitating immediate shut down to prevent further damage.

Technical details of this issue include the blade clutch being affected by excessive engine heat, impacting its functionality. This is particularly problematic during extended use in hot weather. Overheating can cause damage to the crankshaft and other mower components. Identifying symptoms like a “hot” electrical smell or a charging light can indicate underlying issues with hoses, wires, or connectors related to the blade clutch.

Wade Incorporated, a John Deere dealer in Coldwater, Mississippi, emphasizes the importance of addressing these issues promptly. They note that proper maintenance and timely repairs are crucial for ensuring the longevity and performance of equipment like the John Deere 757 model. As a longstanding dealer since 1909, they witness firsthand how such mechanical issues can impact the efficiency and productivity of their clients’ operations​.

How to Fix Failed Blade Clutch:

  1. Inspect the Clutch: Regularly check the electro-magnetic clutch for any signs of wear or damage. Look for any burnt or melted connectors, which could be a sign of overheating.
  2. Ensure Proper Ventilation: Ensure that the mower is well-ventilated to prevent overheating, especially during hot weather.
  3. Check Electrical Connections: Inspect all electrical connections related to the blade clutch to ensure they are secure and free of damage.
  4. Replace Damaged Components: If the hoses or wires are stretched or broken, replace them immediately.
 John Deere 757

3. Lean Running Condition

The lean running condition in the mower, as experienced by Carlos Martinez, a homeowner in Fresno, California, is a common issue, especially in machines that have been in use over a year or two. Carlos noticed this issue while maintaining his large yard, which exemplifies the low severity but notable impact of this issue. The primary cause is the accumulation of dirt, debris, gum, or varnish in the engine, leading to the engine running hotter than usual and affecting performance and longevity.

The technical details of this issue include the need for regular cleaning of the engine and mower parts to prevent dirt accumulation. The carburetor may require adjustment or cleaning if clogged. It’s also crucial to inspect for any leakage or damage in the cylinders, hoses, and wires, as these can contribute to the lean running condition.

At Farmers Rental and Power Equipment in Boone, North Carolina, a family-owned business with over 37 years of experience, they stress the importance of regular maintenance for John Deere mowers. They note that “early detection of issues, such as lean running conditions, is vital. It not only extends the lifespan of the mower but also ensures consistent, top-notch performance.

How to Fix Lean Running Condition:

  1. Regular Cleaning: Ensure you clean the engine and other essential parts of your mower to prevent dirt and debris accumulation. A monthly cleaning routine is advisable.
  2. Carburetor Adjustment: If the carburetor is poorly adjusted, have it adjusted properly. If it’s clogged, ensure it’s cleaned thoroughly to improve the fuel-air mixture.
  3. Check for Leaks: Inspect the cylinders, hoses, and wires for any leakage or damage. Replace or have them replaced if they’re affected.

4. Unusual Fuel Delivery

Unusual fuel delivery, as identified by Julio Rodriguez, a dealer in El Paso, presents a medium severity issue. Rodriguez noted this problem during routine inventory checks, highlighting a clogged carburetor, leakages in fuel lines and hoses, and a corroded fuel tank, all contributing to unexpected fuel leakage and abnormal fuel flow. These issues can significantly impact the mower’s gasoline engine, especially given its 9.5-gallon fuel capacity. A disrupted fuel supply may result in engine overheating or backfiring, common in this 757 model.

Technical details of the John Deere 757 include a 25HP Kawasaki 675cc 2-cyl gasoline engine and a 9.5-gallon (36.0 L) fuel tank. Key components affecting fuel delivery are the carburetor, fuel lines and hoses, and the fuel tank itself. Tools and parts for repair may involve carburetor cleaners, replacement hoses, or even a new fuel tank, depending on the extent of corrosion or damage.

RDO Equipment Co. in Redfield, South Dakota, a licensed John Deere equipment dealer, emphasizes the importance of addressing these fuel delivery issues promptly. They note, “Ignoring such issues not only diminishes the efficiency of your mower but can also lead to costly repairs down the line. Regular maintenance and early detection of these issues are crucial for the longevity of your equipment

How to Fix Unusual Fuel Delivery:

  1. Inspect the Carburetor: Check for any clogs in the carburetor. Clean the carburetor with a carburetor cleaner to remove any residues or obstructions. If necessary, consider replacing the carburetor or consulting a professional for a thorough inspection.
  2. Examine Fuel Lines and Hoses: Check the fuel lines and hoses for any signs of leakages or damages. Replace any damaged or leaking fuel lines and hoses.
  3. Inspect the Fuel Tank: Check for corrosion or damages in the fuel tank. If corrosion is found, consider replacing the fuel tank to prevent further leakage.
  4. Use Premium-Grade Fuel: Opt for a higher octane rating fuel (Octane rating 89 or higher) as it produces less heat and burns more slowly, ensuring a steady fuel delivery to the engine.

5. Faulty Pulley and Belt

As highlighted by Jason Smith, a member of a local gardening club in Raleigh, North Carolina. These problems are primarily due to extended use, affect the mower’s efficiency. The mower’s pulleys can develop a noticeable wobble, and their internal parts may exhibit greasiness, signaling the need for replacement. The V-shaped belts, crucial for transferring power to the blades and other components, also wear out over time. This wear is more evident in the John Deere 757 model, given its 1130 lbs weight and the operational demands placed on its belt and pulleys.

The mechanical aspects such as its V-shaped belts and pulleys, play a critical role in its functioning. Over time, these parts can wear down, particularly in heavy-duty model like this. Regular checks for signs of wear, such as greasiness in the pulleys or fraying in the belt, are vital. The weight of the mower and the stress from the electro-magnetic clutch, which engages and disengages the blades, contribute significantly to the wear and tear of these components.

The High Country Lawnmower & Chainsaw, a local equipment dealer in Boone, North Carolina, said that the issue of worn pulleys and belts in lawn mowers like this 757 truck is not uncommon. They emphasize the importance of timely maintenance, noting, “Regular replacement of these parts is crucial for maintaining optimal mower performance and preventing costly repairs down the line.”

How to Fix Faulty Pulley and Belt:

  1. Inspect the Pulleys and Belt: Regular inspection can help in identifying the wear and tears early. Look for signs like greasiness in pulleys or a worn-out belt.
  2. Refer to the Manual: Ensure you have the right specifications for the replacement parts by referring to the user manual.
  3. Purchase Quality Replacement Parts: Opt for brand-approved replacements. John Deere provides suitable replacements for old V-shaped belts. Alternatively, Kevlar V-design belts are a budget-friendly and reliable choice.
  4. Replace the Faulty Components: Remove the old pulleys and belt and install the new ones. Ensure they are seated and aligned correctly to prevent further issues.

6. Electrical Issue

Electrical issues, as highlighted by Los Angeles-based rancher Michael López, are not uncommon and can have significant impacts on operation. These issues often manifest in the handle and blade engagement system, causing erratic behaviors like the engine shutting down when handles are pulled in or necessitating blade engagement for movement. Such issues point to potential malfunctions in wiring or electrical components.

The mower’s design, featuring a 12-volt battery with a negative ground and a 20-amp charging system, requires precise adherence to these specifications to avoid electrical problems. Commonly reported issues include crossed wires, malfunctioning seat switches, and problematic wiring around the handles and blade engagement system. For example, a scenario where the mower shuts down upon handle engagement unless the blades are already active suggests a wiring issue in these control areas.

In addressing these electrical issues, the technical aspects to consider include the 12-volt battery system with a negative ground, the 20-amp charging capacity, and the specific wiring and electrical components. Tools and methods for resolving these issues involve checking for loose connections, damaged wiring, and wear around the handle and blade engagement system, ensuring proper battery voltage, examining fuses and relays for faults, inspecting the seat switch functionality, and verifying the voltage regulator connections, including the wires leading to the battery and stator.

Regarding the electrical issues of this model, a statement from “Batesville Lawn & Tractor,” a local equipment dealer in Batesville, Mississippi, sheds light on the significance of these problems. They emphasize that such electrical malfunctions can severely hinder the efficiency and reliability of lawn mowers, affecting both professional and personal use. Batesville Lawn & Tractor underscores the importance of inspections to prevent and address these issues, noting their impact on local lawn care and landscaping productivity.

How to Fix Electrical Issue:

  1. Inspect Wiring: Start by checking the wiring, especially around the handles and blade engagement systems for any loose connections, damage, or wear.
  2. Check Battery Voltage: Ensure that the battery voltage reads around 12 volts as specified for the the model.
  3. Examine Fuses and Relays: Look for any bad fuses and relays that could be interrupting the electrical flow.
  4. Check Seat Switch: Inspect the seat switch for proper operation as it’s a safety feature that can cause the mower to shut down if malfunctioning.
  5. Voltage Regulator Check: Ensure the voltage regulator connections are proper, including the wires leading to the battery and stator.
  6. Consult Wiring Schematic: Utilize a wiring schematic for the 757 model to accurately troubleshoot and identify any miswired connections or faulty components.

7. Improper Blade Engagement

The issue of improper blade engagement, a concern often faced by Kevin Johnson, a professional landscaper from Atlanta, Georgia, is not just a minor inconvenience but a significant operational hurdle.

This problem typically stems from the Power Take-off (PTO) system, where a malfunctioning switch or clutch can impede blade activation. Additionally, the belt that drives these blades may be improperly tensioned, misaligned, or damaged, further contributing to the issue. Electrical factors, such as loose or corroded connections, also play a critical role. Crucial components like the blade engagement cable and safety switches (seat switch, parking brake switch) must be in optimal condition.

In Monticello, Indiana, GreenMark Equipment, a service center specializing in John Deere products, emphasizes the importance of addressing these issues promptly. “Regular maintenance and early detection of problems like improper blade engagement are key to ensuring the longevity and efficiency of John Deere equipment, especially in demanding landscaping tasks,” they note.

How to Fix Improper Blade Engagement:

  1. Check the PTO System: Ensure the Power Take-off (PTO) switch or clutch is properly engaged. A faulty switch or clutch may prevent the blades from engaging.
  2. Inspect the Belt: Ensure that the belt driving the blades is properly tensioned. Inspect the mower deck belt for any signs of damage or misalignment.
  3. Examine Electrical Connections: Check all electrical connections and wiring related to the blade engagement system. Tighten any loose connections and replace corroded ones.
  4. Verify Blade Engagement Cable: Ensure that the blade engagement cable is in good condition and connected properly.
  5. Check Safety Switches: Make sure that all safety switches are functioning correctly.
  6. Inspect Solenoid and Relay: Check the solenoid or relay in the blade engagement circuit for any signs of damage or failure.
  7. Consult the User Manual: If after trying the above steps the issue persists, consult the user manual for your specific model of John Deere mower for additional troubleshooting tips or contact information for customer support.
  8. Prioritize Safety: Always ensure that the mower is turned off and the spark plug wire is disconnected before inspecting or working on any components.

8. Difficulty in Steering

Steering difficulties, as experienced by Alex Hernandez, a homeowner in Orlando, Florida, are typically linked to the hydraulic system. Issues such as air in the system, clogged filters, or deteriorated seals can significantly impact the ease of steering. Additionally, the power steering fluid level is a critical factor; low levels can result in steering challenges, and leaks in the steering assembly, including the power steering pump and hose, must be addressed.

In this model, the hydraulic system is often the primary concern. Issues with air in the system, clogged filters, and worn seals are common and can hinder steering efficiency. Moreover, power steering fluid levels are crucial for smooth operation, and any leaks in the power steering pump or hose need immediate attention. Additionally, worn mechanical components like tie rods or the steering rack can exacerbate steering problems.

At Impact Rental in Payson, Utah, experts highlight the importance of regular maintenance for mower equipments. They emphasize, “Maintaining fluid levels and promptly addressing hydraulic system issues are crucial for ensuring reliable and effortless steering, particularly for equipment frequently used in varied terrain and conditions”​

How to Fix Difficulty in Steering:

  1. Check the Power Steering Fluid: Ensure the power steering fluid is at the correct level. Refill if necessary.
  2. Inspect the Hydraulic System: Check for air in the system, plugged filters, or worn seals. Replace filters and clean the system of any dirt or debris.
  3. Look for Fluid Leaks: Inspect the power steering pump and hose for any leaks. Replace these components if they are damaged.
  4. Examine Mechanical Components: Check for worn-out steering components such as tie rods or the steering rack. Replace any worn-out or damaged parts.
  5. Professional Inspection: If the problem persists or you’re unsure about any steps, consider seeking professional help.
  6. Regular Maintenance: Keep up with regular maintenance to prevent future steering issues. This includes changing the fluid and filters as per the manufacturer’s guidelines and ensuring that the mechanical components are in good working order.

If you don’t already own one, should you buy it?

You should consider buying the the 757 because it is praised for its power, robust build, and user-friendly design, making it a top choice among lawn care enthusiasts. However, it’s not without its issues, such as engine backfiring, failed blade clutch, and electrical problems, which can be both costly and challenging to fix. On the other hand, its capabilities, such as the 25 hp engine, full-pressure lubrication, and air cooling system, are highly commended.

Comparatively, models like the John Deere Mid Z-Trak 737 or newer models like the z375r might offer fewer issues or more advanced features. The warranty for new John Deere agricultural and turf equipment is provided in a separate document by the dealer, and it’s advisable to contact your local dealer for more information on how it applies to these common issues.

The cost perspective is also a crucial factor; a used the 757 is considered a reasonable purchase at around $3-3.5K. However, it’s important to factor in potential repair costs.

Dr. Emily Johnson, a pulmonologist from Claremont, NH, highlights the importance of considering the health implications of exposure to lawn mower emissions, especially for those with prolonged use, emphasizing the need for effective emission controls in lawn mowers.

Why trust Igra World?

The journey commenced with meticulously producing a comprehensive list of common issues faced by 757 owners—each problem was thoroughly dissected by our seasoned mechanics. The mechanical gurus at Igra World tirelessly fixed and adjusted maladjusted components, ensuring each model was brought back to its optimal performance. Our editorial team, not to be outdone, dove into the nitty-gritty of every malfunction, from the often complained about engine backfiring, to the dreaded hydraulic system malfunction—meticulously documenting each step of the resolution process. The worn-out components were swiftly replaced, and the entire system was cleaned of any grime, ensuring a smooth operation henceforth. The guide didn’t just stop at addressing the common issues; it delved into the subtle nuances that could vibrate the performance of this model lawn tractor out of rhythm. Each complaint from our trusted reader base was taken to heart, ensuring no stone was left unturned. The result? A troubleshooting guide that not only addresses the typical woes like worn out blade spindle bearings but provides a roadmap to a seamless mowing experience—showcasing why Igra World is a name to be trusted among lawn tractor buyers and owners.

About Jeff Henderson

Have a question regarding your lawn tractor? Igra World writer Jeff Henderson may have covered it already on this site, if not you can contact him at jeff.h@igra-world.com and (417) 414-5099 if you have an problem you can't find an answer to. Jeff is a part time tractor mechanic and landscaping company owner who lives in Springfield, Missouri. He has over 10 years of experience in tractor repair and small engine repair, and has worked with John Deere, Husqvarna, Toro, Troy Bilt, Cub Cadet and Kubota equipment.

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