Bosch Starter Motor 12V 9 Tooth CW 1.1KW Part No. 1986S00659

The Bosch starter motor listed here is a 12V unit with 9 teeth, clockwise rotation, and a 1.1kW power rating. It carries part number 1986S00659 and is supplied as an OE product, which makes the identification details important when matching to the original starter on the vehicle or machine.

Key physical dimensions for checking fit are a 110mm mount centres measurement, 74mm flange diameter, 11.5mm mount hole diameter, and 212mm overall length. The pinion measures 29mm in diameter and sits 21mm at rest. These measurements are the practical checkpoints that matter when confirming a replacement starter.

This starter motor is a dry clutch type and uses a 2-hole starter mount with 2 mounting bores. It is manufactured in China and includes a 12-month warranty. For a rotating electrical component, matching the electrical rating, rotation, tooth count, and mounting pattern is essential before ordering.

Key Features

• Bosch starter motor
• 12V electrical system
• 9-tooth pinion
• Clockwise rotation (CW)
• 1.1kW power rating
• OE product

Specifications

• Part No.: 1986S00659
• Brand: Bosch
• Product type: Starter motor
• Voltage: 12V
• Power rating: 1.1kW
• Number of teeth: 9
• Rotation: CW
• Starter mount type: 2 hole

Fitment guidance

• Listed applications include Perkins 102-05, Perkins 103-07 and Perkins 103-10.
• Sample application data also references Perkins 102-05 1985, Perkins 103-07 1980 and Perkins 103-10 1980.
• Fitment should still be checked against the part number and matching measurements before purchase.

Application and Buying Notes

The most reliable way to confirm this starter motor is to compare the part number 1986S00659 and the Bosch description 12V 9Th CW against the removed unit. A 12V starter with 9 teeth and clockwise rotation must match the vehicle’s electrical system and starter drive arrangement, otherwise the unit may not engage correctly.

Physical dimensions are just as important as the electrical details. Check the 110mm mount centres, 74mm flange diameter, 11.5mm mount hole diameter, and 212mm overall length against the existing starter and mounting face. The 2-hole mount and 2 mounting bores need to line up properly for installation to proceed as expected.

The pinion details are also worth confirming before ordering. This unit has a 29mm pinion diameter and 21mm pinion at rest, which are useful checks when comparing replacement starters. The dry clutch specification should also be matched to the application, especially where the original component has a different construction or engagement setup.

For buyers working on Perkins applications, the listed fitment points to Perkins 102-05, Perkins 103-07 and Perkins 103-10 families, including sample references such as 1985 and 1980 applications. Even with those references, the safest approach is to verify the full application details, starter type, and dimensions against the original part fitted to the machine.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number 1986S00659 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type STARTER MOTOR, Unit of Measure EACH, Warranty 12 Months, Mount Centres A 110mm, Number of Teeth 9, Pinion at Rest 21mm, Power Rating 1.1kW, Voltage 12, Wet / Dry Clutch Dry, Packaging length 32.5.

Additional published details for cross-checking include Packaging height 13.9, Weight 3.28kg, Product Group 1 ROTATING ELECTRICAL, Part No. 1986S00659, Brand BOSCH, Description Bosch Starter Motor 12V 9Th CW, Flange Diameter 74mm, Mount Hole Diameter 11.5, Overall Length 212mm, Pinion Diameter 29mm.

Bosch Starter Motor 12V 9Th CW. Part number 1986S00659 should be checked first. Listed voltage is 12. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986S00659, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a starter motor in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include PERKINS 102-05, PERKINS 102-05 1985, PERKINS 103-07, PERKINS 103-07 1980. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm compatibility by matching part number 1986S00659, 12V electrical rating, 9-tooth clockwise rotation, and the listed mounting and dimension details against the original starter and application before ordering.

FAQ

What is the part number for this Bosch starter motor?

The part number is 1986S00659. For this listing, part number 1986S00659 is the main reference point. Listed voltage is 12. Published fitment references include PERKINS 102-05, PERKINS 102-05 1985, PERKINS 103-07. These details should still be checked against the original unit before ordering.

What voltage and power rating does it have?

It is a 12V starter motor with a 1.1kW power rating. For this listing, part number 1986S00659 is the main reference point. Listed voltage is 12. Published fitment references include PERKINS 102-05, PERKINS 102-05 1985, PERKINS 103-07. These details should still be checked against the original unit before ordering.

Is this starter motor clockwise or anti-clockwise?

It is clockwise rotation (CW). For this listing, part number 1986S00659 is the main reference point. Listed voltage is 12. Published fitment references include PERKINS 102-05, PERKINS 102-05 1985, PERKINS 103-07. These details should still be checked against the original unit before ordering.

How many teeth does the starter pinion have?

It has 9 teeth. For this listing, part number 1986S00659 is the main reference point. Listed voltage is 12. Published fitment references include PERKINS 102-05, PERKINS 102-05 1985, PERKINS 103-07. These details should still be checked against the original unit before ordering.

What fitment information is listed?

Listed fitment includes Perkins 102-05, Perkins 103-07 and Perkins 103-10, with sample application references including 1985 and 1980 entries. For this listing, part number 1986S00659 is the main reference point. Listed voltage is 12. Published fitment references include PERKINS 102-05, PERKINS 102-05 1985, PERKINS 103-07. These details should still be checked against the original unit before ordering.

What should be checked before buying?

Check the part number, 12V rating, 9-tooth CW rotation, 2-hole mount, and the listed dimensions including 110mm mount centres, 74mm flange diameter, 11.5mm mount hole diameter, and 212mm overall length. For this listing, part number 1986S00659 is the main reference point. Listed voltage is 12. Published fitment references include PERKINS 102-05, PERKINS 102-05 1985, PERKINS 103-07. These details should still be checked against the original unit before ordering.