C100 Up Starter Motor Assy

Brand: Mortch Motor
Product Code: MIC100-6050B

Product Viewed: 323

Availability: In Stock

Weight: 1.00kg

Packing Size: 8.50 x 8.50 x 19.00cm

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C100 12V Electric Starter Motor

⚡ Starter Motor · Electric Starter · 12 Teeth · 12V

For 4-Stroke Air-Cooled ATV & Dirt Bike Engines · Fits 139FMB, 147FMD, 147FMF, 150FMG

📋 Product Overview

This is a 12V electric starter motor, the core actuator of the engine's electric start system. It is commonly used on 4-stroke air-cooled ATV and dirt bike engines, typically found on 50cc ATV and dirt bike engines, but sometimes used on larger displacement models. Fits engines including 139FMB, 147FMD, 147FMF, 150FMG, and similar models.

The starter motor is powered by the battery and controlled via a solenoid (starter relay), converting electrical energy into mechanical energy to rotate the engine crankshaft for electric starting. Manufactured with high-quality copper windings, high-performance permanent magnets, and precision-machined gears, it offers high torque, fast rotation, and long service life. This motor is the ideal replacement when the original starter shows signs of weakness, abnormal noise, failure to turn, or gear wear.

✨ Key Functions: Converts electrical to mechanical energy · Drives crankshaft rotation · Electric start actuator · High torque output · Reliable starting

📐 Specifications

Product Name

12V Electric Starter Motor

Engine Application

139FMB / 147FMD / 147FMF / 150FMG

Voltage

DC 12V

Teeth

12 Teeth

Mounting A-B

72.73 mm

Mounting B-C

64.84 mm

Mounting A-C

64.08 mm

📏 Mounting Dimensions

72.73 mm

64.84 mm

64.08 mm

💡 Note: The mounting bolt pattern is a standard triangular flange. Please verify your original mounting dimensions match the specifications above.

🔧 Compatible Engine Models

This starter motor fits the following engine models:

139FMB

147FMD

147FMF

150FMG

Engine Reference Information:

139FMB: 1P39FMB / 1P39QMB · 50cc-125cc universal engine
147FMD: 1P47FMD · 70cc-110cc engine
147FMF: 1P47FMF · 90cc-110cc engine
150FMG: 1P50FMG · 125cc-150cc engine

Note: This starter motor is commonly found on 50cc-110cc engines; some 125cc-150cc models also use this specification.

🛵 Compatible Vehicles

ATVs - 50cc-110cc quad bikes; some 125cc-150cc models
Dirt Bikes - 50cc-110cc off-road motorcycles
Mopeds - Electric start 50cc-110cc underbones, scooters
Cub Series - Honda Cub electric start models and clones
Other vehicles using 139FMB, 147FMD, 147FMF, 150FMG engines with electric start

📌 Compatibility Note: This starter motor is commonly found on 50cc ATVs and dirt bikes, but some larger displacement models also use this specification. Please verify the mounting dimensions (A-B:72.73mm, B-C:64.84mm, A-C:64.08mm) match before purchase.

⚙️ Importance of Starter Motor

⚡ Electric Start Core

The actuator of the electric start system, responsible for cranking the engine.

🔋 Energy Conversion

Converts battery electrical energy into mechanical torque for starting.

🛡️ Reliability Assurance

A high-quality starter ensures reliable engine starting every time.

🔧 Durability Key

Withstands frequent starting and high current surges; requires quality materials.

⚠️ Starter Motor Failure Symptoms: No response when pressing start button, slow cranking/weak start, unusual noise (clicking or grinding), excessive heat, starter runs continuously after release. If these occur, inspect and replace the starter motor.

⚠️ Common Starter Motor Failure Symptoms

No Response: Pressing start button, relay clicks but motor does not turn, or no response at all.
Slow Cranking/Weak Start: Motor turns slowly, unable to crank engine to starting speed.
Unusual Noise: Clicking sound (gear engagement issue) or grinding noise (bearing wear).
Excessive Heat: Motor housing becomes abnormally hot after starting attempt; possible internal short or overload.
Continuous Running: Motor continues to run after releasing start button (relay contacts welded).
Gear Wear: Inspection reveals worn or chipped drive gear teeth.
Brush Wear: Worn carbon brushes cause weak or no motor operation.

If you experience these symptoms, inspect the starter motor and related circuits, and replace if necessary.

✨ Product Features

OEM Specifications: Manufactured to original mounting dimensions and electrical parameters for perfect fitment.
12-Tooth Drive Gear: Precision-machined gear for smooth engagement with the flywheel ring gear.
High-Quality Copper Windings: Pure copper wire for excellent conductivity and low heat generation.
High-Performance Permanent Magnets: Strong magnetic field for high torque output and fast starting.
Precision Bearings: High-quality bearings for smooth operation, low noise, and long life.
Standard Mounting Dimensions: Triangular flange pattern (72.73/64.84/64.08mm) for broad compatibility.
Direct Replacement: Directly replaces weak or damaged original starter motor without modification.

🔧 Installation Tip

1. Disconnect the battery negative terminal before replacing the starter motor to prevent short circuits.
2. Remove the original starter motor and clean the mounting surface.
3. Inspect the flywheel ring gear for wear or damage; replace if necessary.
4. When installing the new starter, ensure the drive gear properly engages with the ring gear.
5. Tighten mounting bolts in a crisscross pattern to the specified torque.
6. Connect the power wire securely; ensure good contact.
7. Reconnect the battery negative terminal and test the starting function.
8. Listen for abnormal noise during starting; verify normal motor operation.

⚠️ Important Notice: This is a 12V electric starter motor with 12 teeth, suitable for 4-stroke air-cooled ATV and dirt bike engines, fitting 139FMB, 147FMD, 147FMF, 150FMG and similar models.
Mounting Dimensions: Please verify mounting hole distances: A-B:72.73mm, B-C:64.84mm, A-C:64.08mm before purchase. Measure your original starter if unsure.
Application Note: This starter is commonly found on 50cc ATVs and dirt bikes, but some 110cc-150cc models also use this specification. Contact customer service if you have questions.
Installation Notes: Ensure proper gear engagement and secure electrical connections. Images are for reference only. The actual product may vary.

🔧 Compatibility Notice

Please verify that this part fits your specific vehicle model and year. Many vehicles share similar names but use different components depending on year or market region.
We strongly recommend cross-checking with your vehicle's owner's manual or contacting us for confirmation before placing your order.

📄 Product Disclaimer

Product images, measurements, and descriptions are for reference only. Slight variations in color or appearance may occur due to manufacturing batches or photography lighting—functional specifications remain identical to the ordered part.
Professional installation is mandatory. Mortch Motor assumes no liability for damages, injuries, or losses resulting from improper installation, misuse, unauthorized modification, or abnormal operation.

💰 Import Duties & Taxes

All listed prices EXCLUDE shipping costs, import duties, taxes, and customs clearance fees. These charges (if applicable) are determined and collected by your local customs authority and are solely the buyer's responsibility.
In case of return due to unpaid duties/taxes or refusal to clear customs, the buyer shall bear the original shipping cost, return shipping fees, and any associated administrative charges deducted from the refund.

📌 Order Confirmation: By completing your purchase, you acknowledge that you have read, understood, and agreed to all terms above. For any questions, please contact our support team prior to ordering.