ProMintu Starter Motor Replacement for Briggs & Stratton 16-Tooth Flywheels — Direct-Fit, High-Torque

ProMintu starter motor is a durable, direct-fit replacement for select Briggs & Stratton and John Deere lawn mower engines with a 16-tooth flywheel.

This high-torque starter is engineered to restore reliable ignition on compatible small engines, offering a cost-effective alternative to OEM units. It’s designed for use with plastic or aluminum flywheels and replaces part numbers 497525, 497401, and 392744. The unit fits a broad range of Briggs & Stratton engine model numbers commonly found in residential mowers and compact equipment.

Which engines and part numbers will this starter replace?

This ProMintu starter is made to match multiple Briggs & Stratton engine models and known OEM part numbers. It’s built specifically for engines using a 16-tooth pinion and is compatible with many listed Briggs & Stratton model codes as well as certain John Deere models.

• Replaces OEM parts 497525, 497401, 392744
• Fits Briggs & Stratton models such as 40H777, 40R577, 40R677, 441577, 441677, 441777, 445577 and more
• Compatible with John Deere Z425 starter requirements
• Intended for flywheels with 16 teeth only

How simple is installation, and what tools are needed?

Installation is straightforward for anyone familiar with small engine maintenance; the starter mounts where the original unit was located and connects to the same electrical terminals. Typical installation takes 20–40 minutes depending on mower accessibility and experience.

• Basic hand tools: ratchet, sockets, and wrenches
• Disconnect battery or power first for safety
• Transfer bolts and wiring from the old starter to this replacement
• No special machining or modifications required for proper fit

What performance features can I expect from this replacement starter?

The ProMintu starter provides consistent cranking power with a robust gear and housing construction for repeated starts across seasons. It’s manufactured to deliver strong torque and reliable engagement so your engine turns over quickly when you need it.

• High-torque output for dependable starts
• Durable construction suitable for regular lawn care use
• Designed to engage cleanly with 16-tooth flywheels
• Compatible with both plastic and aluminum flywheels

Will this starter work with my mower’s flywheel material?

Yes—this unit is intended for use with plastic or aluminum flywheels only and is not specified for steel flywheels. Confirm your engine uses a 16-tooth plastic or aluminum flywheel before purchasing to ensure correct engagement.

• Use only with plastic or aluminum flywheels
• Check flywheel tooth count (16 teeth) prior to ordering
• Reference engine model numbers to confirm compatibility

Who is this for: This ProMintu starter is aimed at homeowners, lawn-care technicians, and small equipment repair shops that need a dependable replacement starter for Briggs & Stratton and compatible John Deere engines. If you replace worn starters, perform regular mower service, or want an economical alternative to OEM units, this direct-fit starter restores starting performance without complicated modifications.

• Package includes one ProMintu starter motor as pictured
• Compatibility note: 16-tooth pinion; for plastic or aluminum flywheels only
• Replaces listed Briggs & Stratton parts and multiple engine model numbers