Briggs & Stratton 31R907-0007-G1 500cc 17.5 Gross HP Engine with 1-Inch by 3-5/32-Inch Length Crankshaft Tapped 7-16-20-Inch
Condition: New
$819.00
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This item is eligible for return within 30 days of receipt
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Availability:
In Stock.
Arrives
Tuesday, Nov 3
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At a glance
- Condition
- New
- Model
- BS31R907-0007-G1
- Dimensions
- 48"W x 48"H
- Weight
- 51 lb
- Material
- Cast Iron
- Speed
- 9.8 rpm
- Voltage
- 5 volts
Features 5
- Cast iron cylinder sleeve and dual element air filter for extended engine life
- Float carburetor for consistent, easy starting
- Patented linear balancing system provides smoother performance
- 9 amp/electric start only
- CARB Compliant
Description
This genuine 500cc Briggs & Stratton single cylinder engine offers dependable power for your equipment needs. With a power rating of 17.5 horsepower, this engine features a premium Dual Clean air filtration system, electric starter, and maintenance-free Magnetron electronic ignition. With a manufacturer limited warranty of 2 years consumer use / 1 year commercial use, Briggs & Stratton provides power that you can trust. This engine includes a Dura-Bore cast iron cylinder sleeve for extended life. This engine includes an installed muffler. This engine includes a 9 amp charging system.
Specs 16
| Brand | Briggs & Stratton |
|---|---|
| Model Name | BS31R907-0007-G1 |
| Speed | 9.8 rpm |
| Voltage | 5 volts |
| Product Dimensions | 48"W x 48"H |
| Brand Name | Briggs & Stratton |
| Model | 31R907-0007-G1 |
| Number of Items | 1 |
| Manufacturer | Briggs & Stratton |
| UPC | 047282017531 |
| Unit Count | 1 Count |
| Global Trade Identification Number | 31 |
| Part Number | 31R907-0007-G1 |
| Item Dimensions W x H | 48"W x 48"H |
| Item Weight | 51 pounds |
| Material Type | Cast Iron |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 3
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Quality and price
Great price, great quality, runs awesome, started right away. Easy to install and replace.
Reviewed in the United States on June 16, 2026 by Island Boy
REPLACE or REPAIR
I am a do-it yourselfer and have a 2017 Troy-Bilt Pony that originally had a Briggs & Stratton 17.5 Power Built Engine after 6+ years of use and just after replacing the 42" Deck completely, the compression relief valve decided to break preventing the engine to start. So, I was faced with attempting to make that engine repair, (internally) for a new compression relief valve part (priced at $200 for the kit only), plus my time and risk finding additional internal damage to other internal parts or replace the engine entirely. After looking at the cost at new riding lawn mowers, plus the fact I already replaced the deck I opted to replace the engine. This Briggs & Stratton 31R907-0007-G1 500cc 17.5 Gross HP Engine installation was easy, providing you take your time and review YouTube videos prior to starting the job. I suggest you pre-tap the mounting holes with a 3/8 x 16 tap in order to reuse the self-tapping mounting screws. I had to use a utility propane torch to break the hold loose on the crank. I removed / re-used my original exhaust. Engine removal was easy, take photos of fuel lines, linkage and wiring just in case. New engine lined up and bolted right up. Had to remove the new muffler (1/4" Allen). Wire harness took some study. In my case I swapped out the wire harness for the fuel solenoid with my old harness so that the gray and black wire from the fuel solenoid and the black wire from the ignition coil would easily connect to my original connector. I clipped and re-used the connector from the red and black wire from the stator alternator to connect to the voltage regulator, red wire to red wire from voltage regulator and attached the black wire to the black ground wire on the voltage regulator. Did not have to do anything with the yellow wire. Attached battery (hot - red) cable to starter. Added 44 oz. of Briggs & Stratton HD30 Oil to filler tube. I kept my old dip stick because I liked the yellow color cap. Turned the key and it fired right up. Hopped on any mulched the leaves. No adjustments to the carburetor or linkage were required. Took me overall 8 hours by myself, (cautiously). Glad I did it. If your mower is over 6+ years old and the deck and transmission are in good shape I recommend swapping the engine. I also recommend that you consider replacing the upper and lower transmission drive belts if needed. Also suggest you also take apart and clean the steering linkage / gears while the engine is off. Hope this review helps.
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Reviewed in the United States on November 26, 2023 by M. Little
don't depend on visual representation
engine worked fine. How ever engine sent was'nt as represented in online presentation. So don't use image as guide for purchase. Engine sent is actually a more upgraded version, so there are going to be some minor changes to wiring. But did fit perfectly. Thank you ACME.
Reviewed in the United States on May 28, 2026 by Dalemurray
So far so good
Ordered this engine as a replacement. I had a 15.5 Hp engine in my lawn mower before this one's a few more Hp. Install was pretty easy. Disconnect all the electrical. Take out the center bolt on pulley after taking your belts off. Slide the pulley off. There are four bolts holding the engine in place. These are self-tapping bolts. You do not need to tap the holes on the new engine. Pull off old engine, put new engine in place. Line up holes. Take manufacturer bolts. Put it into the hole with an impact gun and just have at it. The bolts are hardened steel & will cut into the soft metal. They do not need to be tapped beforehand. Make sure the key is either on the new engine or in the pulley slide that onto the new engine put bolt in. (At this time you need to add oil add minimum 1 quart) The connector or wires that went to your ignition solenoid from your old engine. Just hook up the wires from color. Mine were black and gray, I had to do some modification to the wires. Put waterproof crimps on the wires with heat shrink. Took the end off the yellow wire connected the yellow wire off the rectifier to the red wire coming from my engine harness. That's what powered my battery. Before installing the belts and hooking up the fuel, try just cranking the engine over a few times to get the oil splashing around through the engine. Then you can hook up the fuel and hook up your belts and start it up. (AT 5 HOURS OF RUN TIME NEED TO CHANGE OIL IN ENGINE SINCE IT DOES NOT HAVE A FILTER MANUFACTURER RECOMMENDS) After that you can change the oil once a year. Good mowing.
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Reviewed in the United States on May 18, 2025 by Brandon Potvin
Works like it should
Why did you pick this product vs others?: Good price for a briggs..the wiring from the 20 HP Kohler was different...for those of you looking how to do it...take cover off blown motor...and match wires to parts on Briggs...1hr 30 min...everything works...including safety switches and reverse blade cut...only used 3 wires...coil...volt reg..and power...all done...👍
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Reviewed in the United States on June 29, 2025 by William P.
Perfect replacement
Good buy, all bolt holes lined up perfectly for my Re210 Snapper. Throttle cables, exhaust and electrical connections were exactly where they were supposed to be. Direct replacement, worked like a dream. Expensive, but worth it so far. My first engine lasted 10 years with heavy usage.
Reviewed in the United States on June 27, 2025 by Kimberly A.
As the other reviewer said, yes it does fit the 31F707 engine
Arrived in good time and condition. I replaced a 31F707-0112 E-1 engine from a 2001 or 02 Sabre 1642HS model. To repeat the other reviewer, it does fit but if you haven't performed this task before it takes a little researching but it's not tough. Take the plastic cover off the engine and leave off until everything (electrical too) is connected and ready to start. Need to reuse the old oil dipstick tube because of the fuel pump (which also needs to be reused from old motor along with the pump mounting bracket). Reuse the mounting bolts which are self-threading, something I wasn't aware of. Also, make sure you remove the muffler and extender and put the old muffler pipe back on. The new muffler fit under the cowling but it started to melt it due to how close it was. I had to use the old electrical harness but otherwise it was direct replacement. Make sure you put oil in it before you start it! All in all took a newbie a little longer but could it again much quicker. Well worth the value as the rest of the tractor is in good working order.
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Reviewed in the United States on September 10, 2018 by Greg
Put the old mower back in service
Replaced a broken engine in a Troy-Bilt riding mower with minor modification to the harness. The exhaust setup was easily swapped with the existing components. This was far cheaper than buying a whole new mower.
Reviewed in the United States on September 4, 2025 by R. Riley