By Graham FisherUpdated November 2026
A Hyper Tough lawn mower won’t start for a handful of common reasons, and when the cause is a worn or failed starter motor, a replacement is often the fix. This guide compares four replacement starter motors sold on Amazon US that owners commonly use on Briggs & Stratton and similar small engines. The selection criteria are fitment with Briggs & Stratton-style engine families, electrical specifications stated in the listing, build quality indicators, and patterns in owner feedback about installation and durability. We have not bench-tested these parts, so treat the notes below as a research summary rather than hands-on results.
Our top picks at a glance
- 1
TOP CHOICEBest overall5746N 16T Starter Motor for Direct Replacement for Briggs and Stratton StarterView on Amazon - 2
Best for Lawn Boy and Briggs & Stratton 140cc enginesLawn Boy TRU-Start 20'' Lawn Mower with for Briggs & Stratton 140cc EngineView on Amazon - 3
Best for DIY repair projectsDurable Wear Design Mower Lawn Mower Starter High Accuracy OperationView on Amazon - 4
Best for multi-model fitmentLawn Mower Engine 12–19.5HP 14T Motor Starter for Briggs & StrattonView on Amazon
Our Top Picks
| Product | Best for | Key feature |
|---|---|---|
| 5746N 16T Starter Motor | Broad Briggs & Stratton fitment | 16-tooth pinion, 12V design |
| Lawn Boy TRU-Start 20” starter | Lawn Boy and 140cc engines | Listed for TRU-Start mower models |
| Lawn Mower Starter (DIY series) | Hobbyist repairs | High-accuracy operation claim |
| 14T Motor Starter (12–19.5HP) | Multiple Briggs model numbers | 14-tooth pinion, many listed part numbers |
5746N 16T Starter Motor for Direct Replacement for Briggs and Stratton Starter
5746N 16T Starter Motor for Direct Replacement for Briggs and Stratton Starter(393499/497401/494198) Fitting John Deere/Cub Cadet/Toro/Scotts mowers,12V high-Torque Power
Best for: Owners who want the widest listed compatibility across Briggs & Stratton and related brands.
This is a good starting point if your Hyper Tough mower uses a Briggs & Stratton-type engine and you need to match a common cross-reference number. Check the original part number on your old starter before ordering.
Key specs:
- 12V electrical system
- 16-tooth pinion
- Listed cross-references include Briggs & Stratton 393499, 497401 and 494198
Pros:
- Broad fitment listing for common small-engine applications
- Listing names specific original part numbers for easy matching
- Marketed as a direct replacement, so mounting is usually familiar
Cons:
- Wide compatibility claims mean you must verify your engine model
- Owner experiences with durability vary, so keep the old starter until the new one is confirmed working
Bottom line: A sensible first choice for owners who want a direct-replacement starter and will double-check the part number against their engine.
Lawn Boy TRU-Start 20” Lawn Mower with for Briggs & Stratton 140cc Engine
for Lawn Boy TRU-Start 20'' Lawn Mower with for Briggs & Stratton 140cc Engine
Best for: Owners with a 140cc Briggs & Stratton engine on a Lawn Boy-style mower.
This listing targets a narrower group of engines than the first pick. If your Hyper Tough mower shares a 140cc platform with the listed model, this is a logical match.
Key specs:
- Designed for Briggs & Stratton 140cc engines
- Listed for 20-inch TRU-Start mower applications
Pros:
- Narrower fitment reduces guesswork for matching engines
- Clear engine-size reference in the listing title
- Suitable when the original starter was a TRU-Start type
Cons:
- Not a fit for engines outside the listed family
- Limited detail in the listing about electrical ratings
Bottom line: Best for owners who have confirmed their engine is a 140cc Briggs & Stratton and want a model-specific match.
Durable Wear Design Mower Lawn Mower Starter High Accuracy Operation
Durable Wear design Mower maintenance DIY repair enthusiasts Lawn Mower Starter High Accuracy Operation
Best for: Hobbyists and DIY repairers who plan to fit and test the part themselves.
This is a general-purpose starter aimed at people comfortable with small-engine wiring and mounting. Pay attention to fitment details before installing.
Key specs:
- Listed as a lawn mower starter motor for DIY replacement
Pros:
- Marketed for durable wear design and accurate engagement
- Suits repair enthusiasts who work from part numbers
- Straightforward listing focused on the replacement role
Cons:
- Fewer explicit specifications in the listing than other picks
- Owners should confirm fitment against the original part before buying
Bottom line: A reasonable choice for a hands-on repairer who will verify fitment and is comfortable with the installation.
Lawn Mower Engine 12–19.5HP 14T Motor Starter for Briggs & Stratton
Lawn Mower Engine 12-19.5HP 14T Motor Starter for Briggs & Stratton 33M777-2117-G1 33M777-2117-G5 33M777-2401-G5 33M777-2495-G5 33M777-3036-G5 33M777-4583-G5 33M977 33M977-0001-G1 33M977-0002-G5
Best for: Owners whose Briggs & Stratton model number appears on the listed cross-reference list.
This listing names many Briggs & Stratton 33M series part numbers, which makes it useful when you are matching by model number rather than by engine size.
Key specs:
- 14-tooth pinion
- Listed for 12–19.5HP Briggs & Stratton engines
- Cross-references include 33M777 and 33M977 part numbers
Pros:
- Long list of explicit Briggs model references
- Covers a broad horsepower range
- Easy to cross-check against a worn starter’s stamped number
Cons:
- Pinion tooth count differs from some other picks, so confirm the match
- Long cross-reference lists can hide a single incorrect fit, so verify your exact model
Bottom line: Ideal if you can read a part number off your old starter and want to match it against a long cross-reference list.
Buying Guide
Match the Starter to Your Engine Family
Before buying, find the engine model and the part number stamped on the old starter. Briggs & Stratton engines are the most common in Hyper Tough mowers, but fitment can vary by year and model. Compare the stamped number with the cross-references in each listing.
Good picks for this: 5746N 16T Starter Motor, Lawn Mower Engine 14T Motor Starter
Check Pinion Tooth Count
Starter pinions are commonly listed as 14-tooth or 16-tooth. A mismatch can cause the starter to spin without engaging the flywheel ring gear. Compare the tooth count on your old part with the listing.
Good picks for this: 5746N 16T Starter Motor, 14T Motor Starter
Voltage and Electrical System
Most small-engine starters in these listings are 12V. Confirm your mower’s battery and wiring voltage before purchase, and keep the old starter’s terminal layout in mind when wiring the new unit.
Good picks for this: 5746N 16T Starter Motor, Lawn Boy TRU-Start 20” starter
Mounting Bolt Pattern and Housing Fit
Physical fit matters as much as electrical fit. Measure bolt spacing and check that the housing sits flush against the engine. Listings often describe a direct replacement, but a visual comparison of the old and new unit is still worthwhile.
Good picks for this: Lawn Boy TRU-Start 20” starter, Durable Wear Design Lawn Mower Starter
Use Case and Repair Skill
If you plan to test and install the part yourself, a model-specific listing reduces risk. If you are less comfortable with wiring, a professional small-engine shop can confirm fitment and installation.
Good picks for this: Durable Wear Design Lawn Mower Starter, Lawn Boy TRU-Start 20” starter
Durability and Build Quality
Owners often report that starters fail from worn brushes, solenoid problems or pinion wear. Look for listings that describe the build, but remember that claims are manufacturer-supplied and not independently verified here.
Good picks for this: 14T Motor Starter, Durable Wear Design Lawn Mower Starter
Care After Installation
Keep battery terminals clean, use a charger suited to the battery, and avoid repeated cranking that can overheat the starter. Also check the flywheel ring gear for damage, since a worn ring gear can make a new starter appear faulty. For wider troubleshooting, see Troubleshooting a Lawn Mower That Won't Start: 8 Steps to Fix It.
Good picks for this: 5746N 16T Starter Motor, 14T Motor Starter
FAQ
Why won’t my Hyper Tough lawn mower start even though the battery is charged?
A charged battery does not rule out a failed starter, a bad solenoid, a loose connection or a fuel or spark problem. Test the starter by checking whether it engages and cranks the engine. If you hear a click but no crank, the starter or its wiring is a likely suspect. For electric models, see Hyper Tough Electric Lawn Mower Won't Start: 8 Causes and Fixes.
How do I know if the starter motor is the problem?
Symptoms include a single click with no cranking, a whirring sound without engine turnover, or no response at all when the key or switch is engaged. Rule out the battery and connections first, then test the starter with a jumper on the solenoid terminals if you are comfortable doing so.
Do I need to match the pinion tooth count exactly?
Yes, in general. A pinion with the wrong tooth count may not engage the flywheel ring gear properly. Compare the number on your old starter with the listing before buying.
Can I use a battery-powered mower starter on a gas engine?
The starters discussed here are for small gas engines with a 12V electrical system. A battery-electric mower uses a different drive system, so these parts do not apply. For battery models, see Hyper Tough Battery Lawn Mower Won't Start: 7 Causes and Fixes.
Is replacing the starter a job I can do myself?
Many owners replace starters with basic hand tools, but you should disconnect the spark plug wire and battery before working on the engine. If you are unsure about wiring or the fuel system, consult a qualified small-engine technician.
What else could stop a Hyper Tough mower from starting?
Common causes include dead or undercharged batteries, a clogged carburetor, old fuel, a fouled spark plug, a blown safety switch fuse and a worn flywheel key. A general checklist can help you isolate the problem before buying parts. See Lawn Mower Won't Start: 8 Causes and Fixes if you have not narrowed it down.
Conclusion
When a Hyper Tough mower won’t start and the starter is the suspect, match the part by engine family, pinion tooth count and voltage first. The 5746N 16T Starter Motor suits owners who want wide Briggs & Stratton cross-reference coverage. The Lawn Boy TRU-Start 20” starter fits 140cc owners who want a narrower match. The DIY-series starter suits hands-on repairers, and the 14T Motor Starter works best for owners who can read a stamped Briggs model number. Verify fitment before you install, and consult a professional small-engine technician if you are unsure about the wiring or the cause of the failure.
Sources
- Consumer safety guidance on working with power equipment and battery safety (cpsc.gov)
- Workplace and home-tool safety guidance relevant to engine and electrical work (osha.gov)
- Background on battery care and charging practices (energy.gov)
About Graham Fisher
Graham Fisher is part of our editorial team and reviews and edits our lawn mowers guides, checking product details against manufacturer specifications and owner feedback.
