Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 21 HP, 1in. x 3 5/32in. Shaft, Model# 331877-3036-G5 Item# 70421

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Engines
Briggs & Stratton Vertical
391cc - 600cc Briggs & Stratton Vertical Engines
Item# 70421

Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 21 HP, 1in. x 3 5/32in. Shaft, Model# 331877-3036-G5

Item# 70421

Only $569.99

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Overview

Features + Benefits

AVS™ Antivibration system
Enhances gear-driven lubrication system by delivering oil directly to the lower PTO bearing to safeguard against wear
Large-capacity air filter traps more dirt and debris

What's Included

(1) Engine

Content Links

	Engines Buyer's Guide
	70421 Product Manual

Key Specs

Engine Displacement (cc)	540
Start Type	Electric
Application	Riding lawn mowers and lawn tractors
Engine Type	Intek - OHV
Rated Power (HP)	21
Shaft Output	Vertical
Crankshaft	Tapped 7/16 - 20, keyway, 1in. dia.
Shaft Diameter (in.)	1
Shaft Length (in.)	3 5/32
Shaft Keyway (in.)	1/4
Shaft End Tapped (Diameter (in.)/Threads per inch)	7/16 - 20
Shaft Rotation (From PTO Shaft Side)	Counterclockwise
Bearing Type	Plain
Cylinders (qty.)	1
Cylinder Bore	Cast iron
Bore x Stroke (in.)	3.70 x 3.06
Cooling System	Air cooled
Air Cleaner Type	Dual element
Fuel Tank	Not included
Fuel Type	Gasoline
Fuel Pump	Yes, Pulse
Fuel Filter	Yes
Oil Capacity (qt.)	1.5 (48 oz.)
Lubrication System	Full pressure
Low Oil Alert	No
Low Oil Shutdown	No
Ignition System	Electronic
Governor System	Mechanical
Carburetor	Float
Throttle Control	Remote
Choke Control	Manual
Max. RPM	3,300
Charging System Amps	9
Muffler Included	Yes
Auto Compression Release	Yes
Bolt Circle (in.)	10
Dimensions L x W x H (in.)	19 x 16 1/2 x 13
EPA/CARB Approval (California Air Resource Board)	Yes
Manufacturer Warranty	24 months parts / 24 months labor
Ship Weight	82.0 lbs
Item#	70421

Brand

	Shop for Briggs & Stratton
	Made in the U.S.A.

Review Terms + Conditions

Print Reviews for Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 21 HP, 1in. x 3 5/32in. Shaft, Model# 331877-3036-G5

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70421 Product Manual

Q & A Terms + Conditions

Print Questions/Answers for Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 21 HP, 1in. x 3 5/32in. Shaft, Model# 331877-3036-G5

Manufacturer Warranty: 24 months parts / 24 months labor

Protect Your Purchase Beyond The Manufacturer's Warranty With Service Protection Plus!

Extended Service Plan Description (learn more)	1 Year	2 Year
Repair Plan	$69.99 More Info	$99.99 More Info
Accidental Damage Repair Plan	$109.99 More Info	$169.99 More Info

Briggs & Stratton Briggs & Stratton Intek Vertical OHV Engine with Electric Start - 21 HP, 1in. x 3 5/32in. Shaft, Model# 331877-0036-G1

Overall Rating:

5 / 5

2 of 2(100%)would recommend this product to a friend.

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Briggs & Stratton 21 HP Intek® Vertical OHV Engine with Electric Start delivers top performance to meet the demands of professionals. The OHV engine features a pressure lubrication system with an automotive full-flow style spin-on oil filter that cleans contaminants from the oil. U.S.A. Engine Displacement (cc): 540, Start Type: Electric, Application: Riding lawn mowers and lawn tractors, Engine Type: Intek - OHV, Rated Power (HP): 21, Shaft Output: Vertical, Shaft Diameter (in.): 1, Shaft Length (in.): 3 5/32, Shaft Keyway (in.): 1/4, Shaft End Tapped (Diameter (in.)/Threads per inch): 7/16 - 20, Shaft Rotation (From PTO Shaft Side): Counterclockwise, Bearing Type: Plain, Cylinders (qty.): 1, Cylinder Bore: Cast iron, Bore x Stroke (in.): 3.70 x 3.06, Cooling System: Air cooled, Air Cleaner Type: Dual element, Fuel Tank: Not included, Fuel Type: Gasoline, Fuel Pump: Yes, Pulse, Oil Capacity (qt.): 1.5 (48 oz.), Lubrication System: Full pressure, Low Oil Alert: No, Ignition System: Electronic, Governor System: Mechanical, Carburetor: Float, Throttle Control: Remote, Max. RPM: 3,300, Charging System Amps: 9, Muffler Included: Yes, Bolt Circle (in.): 10, Dimensions L x W x H (in.): 19 x 16 1/2 x 13, EPA/CARB Approval (California Air Resource Board): Yes AVS™ Antivibration system Enhances gear-driven lubrication system by delivering oil directly to the lower PTO bearing to safeguard against wear Large-capacity air filter traps more dirt and debris

Briggs & Stratton Briggs & Stratton Intek Vertical OHV Engine with Electric Start - 21 HP, 1in. x 3 5/32in. Shaft, Model# 331877-0036-G1

Overall Rating:

5 / 5

21hp intek,

August 30, 2010

By Jetogi

from Molalla, Oregon

"I received the motor promptly, undamaged, and with no complications. I changed over the exhaust and wiring to my riding mower and had it up and running in less than 2 hours. It has ran and idled perfectly since. My only concern is longevity and obviously only time will tell. As of now, I would recommend this motor to anyone. I would definitely recommend Northern for service and pricing."

What is your level of technical expertise? Home Handyman

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Briggs & Stratton Briggs & Stratton Intek Vertical OHV Engine with Electric Start - 21 HP, 1in. x 3 5/32in. Shaft, Model# 331877-0036-G1

Overall Rating:

5 / 5

Replcement engine,

June 1, 2010

By olebuck

from Emporia Kansas

"This engine is everything it was said to be.The wiring harness plugged into the Husky mower it was installed on,and it started and ran on the first crank of the starter.Very smooth ranning and good power.Have only put about 5hrs on it so far,but seems to be strong and don't expect any problems. Delivery was in three days after oder was placed. Super service."