Briggs & Stratton Vertical Engine - 31L777-3136-G5

FREE SHIPPING - Briggs and Stratton 500cc 17.5 Gross HP Extended Life Engine with a 1" diameter by 3-5/32" Length Crankshaft, Keyway, and Tapped 7/16-20, Oil Pump W-Filter, Equipped with a 12 Volt Starter and a 9 amp DC Alternator, Model 31L777-3136-G5

Briggs & Stratton Vertical Engine
Item No.BS-31L777-3136-G5
Your Price! $115997
Shipping: Free
NNew In stock

Key Product Info

FREE SHIPPING - Briggs & Stratton Professinal Series 500 cc 17.5 Gross HP Vertical Engine with a 1 inch x 3-5/32 inch Crankshaft, 12V Electric Start with 9A Alternator, Fuel Pump, Oil Pump with Filter, Muffler

Weight: 81.0 lbs.

Features & Benefits

  • Dura-Bore cast iron cylinder sleeve for extended life
  • Float carburetor for consistent easy starting
  • Maintenance-free Magnetron electronic ignition for quick, dependable starts
  • Advanced debris management system with a dual seal, cartridge-style air filter provides maximum protection and extends engine life
  • Overhead valve design for cooler operation and longer valve life
  • Patented linear balancing system provides smoother performance
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Key Specs

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Product Type Vertical Shaft Engines
Warranty 2 Years Consumer/ 1 Year Commercial
Displacement Range 391cc - 600cc
Horsepower Range 12hp - 22.9hp
Engine Brand Briggs & Stratton
Crankshaft Diameter 1"
Crankshaft Length 3-5/32"
Crankshaft End Tapped Size 7/16-20
Crankshaft Keyway Width 1/4"
Air Cleaner Type Cartridge with Pre Filter
Throttle Control Remote
Starter Type Electric
PTO Height N/A
Max RPM 3300
Oil Cooler No
Carburetor Type Float
Valve Style Overhead
Recoil Starter Position N/A
Bearing Type Plain
Displacement 500cc
Ignition System Electronic
Lubrication System Pressure
Oil Capacity 48
Muffler Performance Quiet
Flywheel Heavy
Fuel System Gasoline
Governor System Mechanical
Gear Reduction No
Charging System 9 Amp
Choke Control Choke-A-matic
Cooling System Air
Type Small Engines
Fuel Pump Yes
Auxiliary PTO No
Compression Release Yes
MFG Rated Output 17.50 Gross HP
CPSC Compliant No
Low Oil Shutdown No
Low Oil Alert/Shutdown No
Extended Recoil Rope No
Oil Filter Yes
Bolt Circle (in.) 10
Crankshaft Type Straight
Oil Pump Yes
Fuel Filter Yes
Control Box No
Cylinders (quantity) 1
Cylinder Bore Type Cast Iron Sleeve
Bore x Stroke 3.56" x 3.06"
Crankshaft Orientation Vertical
For Use in California Yes
Crankshaft Rotation Direction (from PTO Shaft Side) Counterclockwise
Fuel Tank Capacity None
Color Black

Cross Reference Chart

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31A777-0118-B1 31L777-0036 31L777-0136 31L777-3136 31L777-0036-E1 31L777-0036 31L777-0136-G1 31L777-0136
31L777-3136-G5 28Q777-0536-E1 28CH77-0036-E1 28Q777-0536 28CH77-0036 31L777-0036 31L777-0036-E1 31L777-0136-G1
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Shipping & Delivery

  • FREE Shipping on orders over $100 (just in the lower 48 States)
  • FREE Residential & Liftgate Service
  • Shipments Received in 1- 6 Business Days

All orders that total $100 or higher qualify for free ground or free freight shipping (exceptions described below).

Orders that total less than $100 will have a fixed shipping rate of $8.87 per order.

At Equipatron our primary carriers are UPS Ground and FedEx Ground, which we have found to be the most reliable residential carriers.

When your order ships we will notify you via email. Included in your email will be a tracking number for your shipment. We encourage you to track your shipment online or on the phone with UPS and FedEx. Be sure to contact us if anything seems unusual with the progress of the shipment. You can also track your packages via Order Status on

Depending on how close you are to the shipping warehouse, your item will arrive in 1 to 6 business days after it leaves the warehouse.  If you want an item left at your doorstep, the best thing to do is leave a note on your door asking the driver to leave your package with "No Signature Required." Be sure to include your name and tracking number on the note-----but we don’t recommend this. The most important thing to remember about truck freight is that you should inspect the package at the time of delivery. If the box has any damage, or if there is any reason for you to be at all concerned about potential damage, please write "PRODUCT DAMAGED" clearly on the sheet that they ask you to sign. This simply insures that if there is any damage, it will be easy to take care of the problem.

If you are ordering a large item, around 150 pounds or more, we are providing FREE Liftgate Service to your residence (with the exception of certain designated areas which require a surcharge such as greater New York City). Alternatively, most of our competitors will charge you extra $50 - $100 for this service. Shortly after you receive your tracking information via email, a representative from the designated freight carrier will call you to schedule a convenient delivery time.

In order to keep your costs down and our pricing simple, we provide FREE Shipping in the United States (lower 48 only). The price you see in the shopping cart is the price you pay, with one exception: if you are shipping an order to Wisconsin we have to add sales tax. BEWARE OF COMPANIES who mask their shipping charges and surprise you with prohibitive shipping and handling fees or oversize charges at the end of the checkout process. Make sure you know the total cost of your purchase when shopping around. If you live in Alaska or Hawaii, please call us and we will quote you a freight surcharge prior to placing an order.