Free Shipping and No Hassle Returns
Free Shipping
We offer free shipping on orders over $199.*
No Hassle Returns
Don’t like it? Send it back. It’s that simple.*
Same Day Shipping
Most orders ship same day if placed by 5PM EST (M-F)
*Restrictions Apply. See Details »
Model#: BGSN331977-0001-G1
Condition:
New

What are the different product conditions?

New
Brand new items;Full manufacturer warranty available
Reconditioned
Manufacturer inspected, repaired and tested items; CPO 60 day money back guarantee
Open Box
New or Recon items with possible minor cosmetic damage; CPO 60 day money back guarantee
Certified
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Briggs & Stratton 331977-0001-G1 540cc 21.0 HP Intek Series Vertical Engine with 1 in. Tapped 7/16 - 20 Keyway Crankshaft (CARB)

  • Briggs & Stratton 331977-0001-G1 540cc 21.0 HP Intek Series Vertical Engine with 1 in. Tapped 7/16 - 20 Keyway Crankshaft (CARB)
Free Shipping
(continental U.S.)
+
This item is no longer available.
It has been replaced by the BGSN33R877-0003-G1.

Details

Briggs & Stratton's powerful Intek Series engines deliver unmatched reliability along with superior performance and durability. Featuring XRD technology, the Intek Series features enhanced durability and overall performance due to the consolidation of dozens of improvements.
Features:
  • Advanced debris management with dual-sealing cartridge style air filter provides the maximum protection to extend engine life
  • AVS anti-vibration system provides linear balancing to eliminate side motion to reduce vibration and smoothen operation
  • Dura-Bore cast iron cylinder sleeve withstands more wear and abuse while providing improved oil control
  • DuraLube splash lubrication system offers a gear driven system that continuously supplies oil to all internal parts
  • Heavy-duty Teflon coated bronze sleeve bearing withstands twice the belt load of standard bearings to reduce wear
  • High capacity panel air cleaner element increases cleaning capability for extended life
  • Model Specific Features: Pulse fuel pump, Choke-A-Matic choke, 12V Gear Drive start with 9 amp DC alternator, oil pump with filter and dipstick oil system
  • Please Note: Fuel tank omitted from this model
Includes:
  • 540cc 21.0 HP Intek Series Vertical Engine w/ 1 in. Tapped 7/16-20 Keyway Crankshaft - 331977-0001-G1

Specifications

Series: Intek
Length: 23.8 in.
Width: 21.2 in.
Height: 20.3 in.
Carburetor: Float-Feed
Controls: Remote
Cooling System: Air
Crankshaft Diameter: 1 in.
Crankshaft Length (Sump Face to Crankshaft End): 3-5/32 in.
Crankshaft Model Number: 591150
Crankshaft Tapping Size: 7/16-in - 20
Crankshaft Type: Keyway
Cylinder Bore: 3.70-in (94mm)
Cylinder Stroke Length: 3.06-in (77.6mm)
Engine Configuration: Vertical
Engine Displacement: 540cc
Engine Technology: OHV
Fuel Type: Gas
Governor: Mechanical
Governor Max. Speed: 3,300
Horsepower: 21
Lubrication System: Pressure Lube
Number of Cylinders: 1
Oil Capacity: 48 oz.
Power Type: Gas
Recommended Use: Lawn Mowers, Riding Mowers, Tow-Behind Mowers
Shipping Weight: 82 lbs.
Starter: Recoil

Recommendations

Reviews

There are no reviews for this item. Write Review

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 4 questions Browse 4 questions and 5 answers
I'm useing sae30 briggs oil and the engin is burning oil all the time. Mower is only three years old .
jim on May 7, 2015
BEST ANSWER: Please contact Briggs and Stratton directly at 800-444-7774 for assistance with your mower.
what are the valve clearance on the intake and exhaust?
None on May 30, 2015
BEST ANSWER: The valve clearance on the intake is .003-.005-in and on the exhaust, its .005-.007-in.
What kind of oil does it take?
Bcox708 on May 3, 2015
BEST ANSWER: It takes Briggs & Stratton lawnmower oil SAE 30 small engine oil.
Do you have a drawing of the bolt pattern for this engine?
Tom on Oct 1, 2012
BEST ANSWER: Follow this link, it should give you the information you need:

http://www.northerntool.com/images/downloads/charts/70421.pdf?cm_ven=natural&cm_cat=netconcepts&cm_pla=Google&cm_ite=bolt%2520pattern%2520for%2520briggs%2520and%2520stratton%2520331977-0001-g1