12 V, 3 KW, 10-TOOTH STARTER MOTOR FOR JOHN DEERE IS9506

This 12 V, 3 kWstarter motor with a reduction gear is designed for use in John Deere tractors and combine harvesters. It features a 10-tooth pinion and is available in a non-nose version—a detail to verify before ordering. This part number corresponds to IS9506 and is also comparable to 11.139.208, MS 972, and type AZE4705 to ensure proper installation.

A gear-driven starter for engine startup

The role of a starter motor is to drive the internal combustion engine during startup. For this part number, the inclusion of a reduction gear is an integral part of the starter’s design and serves as an important identification criterion, along with voltage and power.

This model operates at 12 V with a power rating of 3 kW. It is designed for various generations of John Deere agricultural equipment, ranging from certain tractors in the 50, 55, and 60 Series to more recent models in the 7R, 8R, and 9R families, as well as several combine harvesters in the S, T, and W Series.

Part Numbers to Compare Before Replacement

To verify this part number, start by noting the markings on the removed starter. The relevant part numbers are IS9506, 11.139.208, MS 972, and type AZE4705. The nose-less configuration must also be identical to that of the part currently installed.

• Voltage: 12 V
• Power: 3 kW
• Pinion: 10 teeth
• Module: 3.175 mm
• Distance between two teeth: 15.65 mm
• Outer diameter of the pinion: 40.5 mm
• Type: AZE4705

These sprocket dimensions are critical for meshing with the flywheel ring gear. A discrepancy in the number of teeth or the sprocket’s geometry can prevent proper engagement, even if the tension appears to be the same.

Applicable John Deere Applications

This part number is used on a fairly wide range of equipment. Confirmed applications include, for example, John Deere tractors such as the 4250, 8100, 7200R, 8235R, and 9370R, as well as S660, T560, and W650 combine harvesters.

However, the presence of a model within the same product family is not sufficient to confirm compatibility. On widely used agricultural machines, multiple starter versions may exist depending on the model year, engine configuration, or the part number already installed.

When to Check the Starter

A worn-out starter motor may manifest as slow cranking, a clicking sound without starting, intermittent operation, or abnormal noise during engagement. A gear that no longer engages properly may also indicate the need for replacement.

Before proceeding, it’s a good idea to check the condition of the battery, power cables, and ground connections. If your old part has one of the matching part numbers and the same pinion specifications, you have the key information needed to select this starter.

Dimensions and Technical Specifications

• 3.175 mm
• 15.65 mm
• 40.5 mm

Compatibility by Brand and Series

John Deere · S Series

• 50
• 55 and 60 through the latest generations of the 7R Series
• 8R
• 8RT and 9R
• as well as several combine harvesters from the S
• T and W

John Deere · 7R Series

• 7200R
• 7210R
• 7215R
• 7230R
• 7250R
• 7260R
• 7270R
• 7280R
• 7290R
• 7310R

John Deere · 8R Series

• / 8RT
• 8235R
• 8260R
• 8285R
• 8295R
• 8310R
• 8310RT
• 8320R
• 8320RT
• 8335R
• 8335RT
• 8360R
• 8360RT
• 8370R
• 8370RT

John Deere · 9R Series

• / 9RT / 9RX
• 9360R
• 9370R

John Deere · 50 Series

• 4250
• 4450
• 4650
• 4850

John Deere · 55 Series

• 4055
• 4255
• 4455
• 4555
• 4755
• 4955

John Deere · 60 Series

• 4560
• 4760
• 4960

John Deere · 8000 Series

• 8100
• 8200

John Deere · S Series

• S660
• S670

John Deere · T Series

• T550
• T560
• T660
• T670

John Deere · W Series

• W650
• W660

FAQ — Frequently Asked Questions

What does the term “starter without nose” mean?

The term “nose-less” refers to a starter configuration that must be visually compared with the part being replaced. This detail is just as important as voltage or power, since the same tractor may have been equipped with different starter configurations depending on the model year or engine specifications.

How can I confirm that this starter is the right fit for my machine?

The best way to verify is to cross-reference the installed part number with IS9506, 11.139.208, MS 972, or type AZE4705. Also check for a 10-tooth pinion, a module of 3.175 mm, a pitch of 15.65 mm between two teeth, and an outer diameter of 40.5 mm.

Is this starter suitable for John Deere 7200R, 8235R, 4250, or an S660 combine harvester?

Yes, these models are listed among the verified applications for this part number. The same part is also listed for other John Deere tractors in the 50, 55, 60, 8000, 7R, and 8R series, as well as several combines in the S, T, and W series, provided the current installation matches.

What symptoms might indicate that the starter needs to be replaced?

Replacement may be necessary if the engine cranks too slowly, if the solenoid clicks without starting the engine, if operation becomes intermittent, or if a noise occurs during startup. Before ruling out the starter, also check the battery, the power cables, and the circuit grounds.

Original replacement part numbers and brand names are provided for comparison purposes only. This does not imply that these are original parts.