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Briggs & Stratton

Briggs and Stratton Vertical 17.5 HP 500cc INTEK Engine 9amp 1" x 3-5/32" #31R977-0054

    • Based on 204 reviews
Condition: New
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$708.99 Why this price?

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Non-returnable due to Hazmat safety reasons

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Availability: In Stock.
Fulfilled by Small Engine Warehouse
Arrives Friday, Nov 29
Order within 8 hours and 43 minutes
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Features

  • Cast iron cylinder sleeve and dual element air filter for extended engine life
  • Patented linear balancing system provides smoother performance
  • 9 amp/electric start only
  • 1" x 3-5/32" shaft, tapped 7/16" with 1/4" keyway
  • Common riding mower replacement engine

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 a fuel pump. This engine includes an oil filter. This engine includes a 9 amp charging system.

Product Dimensions: 19 x 4 x 4 inches


Item Weight: 0.01 ounces


Manufacturer: Briggs and Stratton


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 29

This item is non-returnable:

Non-returnable due to Hazmat safety reasons

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • John deere writing mower engine
I bought this for my John Deere Riding lawn mower.It's easy to install and it's still working great
Reviewed in the United States on April 17, 2024 by Evelyn Miller
    • Excellent product
Perfect replacement for Toro Timecutter Zero Turn. Installed in about 3 hours put oil, gas turned key and fired right up.
Reviewed in the United States on April 22, 2024 by Michael Clements
    • Engine for Lawn mower
Worked great so far
Reviewed in the United States on April 4, 2024 by Kathy Jenkins
    • Runs more quiet, starts easily
Arrived a few days earlier than anticipated. Easy to switch out. Had one less wire than my old motor but just cut it and it was no issue.
Reviewed in the United States on April 12, 2024 by Amazon Customer
    • Do NOT tap mounting bolt holes. The mounting bolts make their own threads.
I've worked on Lawn tractors for many years. I'm 77. I like this engine. It repalced an old 19.5 with a bad cam which I will repair later. IF you use the right mounting bolts they make their OWN threads. Start them half way before putting the engine on the machine then when you tighten them the engine will be very secure. IF you cut threads in this soft metal your engine might get loose. IF this engine had the same old 6 pin wiring harness like the older ones had, I would have been running this today. There is NO wiring diagram in the manuel either.. IF they had included an updated wiring harnass that would be great. Break it in. Change oil the first time after about 10 hours. This engine came with fuel pump and gas lines. All I had did was hook my gas line to their Filter. Everything cost's a tad too much right now, I've paid less in the past for engines but I feel good about this purchase. The last Intec decompresson on cam lasted about two years before the starter would not crank the engine. I hope this cam decompression has no plastic parts.. I have small engines stacking up needing new cams. I'm hoping the decompression on this cam will last a long time like the old ones did. I loved the old briggs engines and I hope to fall in love with this one. I love the 1 cyclinger Briggs engines. They are so easy to work on. ... show more
Reviewed in the United States on March 14, 2024 by Theysaid
    • Great replacement for the Briggs and Stratton 31r907
After doing a ton of research I found this engine would fit in the same spot as my old 31r907. This model, the 31r977, featured some desirable upgrades like an oil filter and a fuel pump. It was easy to install in the same spot as my old engine. As others have said, do not despair about there not being threading in the mounting holes, your old bolts will make the threads for you. Just start the bolts and turn slowly with a socket wrench. There was some minor wiring I needed to do between the two. What I ended up doing was comparing the old harness to the new one. I de-pinned some of the connectors on the new harness and used the old harness clip to wire into the rest of the lawnmower. Take your time, make sure the wires from the new harness fit into the same spot the old wires did in the old clip, and it'll work perfectly. Something I didn't realize was the old crank bolt is on TIGHT. Be prepared to fight with a bit both getting it on and getting it off. On my 31r907 the torque spec was about 100ft-lbs. This engine does NOT come with oil, be sure to add engine oil before operation. There is a little bit of oil in the crank case probably just for testing. 5 stars, anyone with a bit of mechanical knowledge could swap one of these engines. Very easy as far as motors go. ... show more
Reviewed in the United States on May 30, 2024 by Amazon Customer
    • Wiring took longest
Straightforward install. One hour install. Wiring single-handedly took longest. This engine is the same layout but newer version. Has an oil filter and fuel pump. SO MUCH QUIETER. Only thing that needed switching over from old engine to new was the starter nut to secure the starter wire, muffler, and engine mount bolts. Don’t forget to fill oil! Took one start to fire right up!! :) ... show more
Reviewed in the United States on March 19, 2024 by Abner Flores-Salyers
    • The old mounting bolts will thread the mounting holes on new engine
The media could not be loaded. Shipping was super fast, got here in less than 72 hours. This engine has a oil filter, unlike my old one. Wiring was easy, I used the old connection and spliced the same colored wires together. I then ran the motor and checked my battery to ensure it was being charged. I then cut the last wire flush because it was not needed, orange one. ... show more
Reviewed in the United States on April 27, 2024 by Mcpan

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