The spark plug item number 100696 (model 491055S) can be purchased through Northern Tool. The fuel filter part number 84001895, A/C cartridge filter part number 499486S and paper filter part number 273638S can be purchased from our sister company Jacks Small Engines. Please contact www.jackssmallengines.com for pricing and availability.
Free Gift Card Details
- The promotion will be automatically applied on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
- Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
- E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
- Free e-gift cards expire 03/01/27.
- Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited-time offer. Subject to change without notice.
Briggs & Stratton Twin Cylinder Vertical Shaft Engine with Electric Start, 25HP, 1in. x 3 5/32in. Shaft, Model# 44S977-0032-G1

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Click or Tap image to Zoom
Shipping:
Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- Model# 44S977-0032-G1; 25 HP, 724cc twin cylinder engine with 1in. x 3 5/32in. vertical shaft
- Magnetron electronic ignition for fast, easy, effortless starts
- Ready Start system with electric start provides easy starts without the need to choke the engine
- Dura-Bore cast iron cylinder sleeve delivers extended life
- Premium Dual Clean air filtration system keeps the engine running clean
See full description
Description
Key Specs
Reviews
Q & A
Accessories
Warranty
Compare
Product Summary
What's Included
- (1) Engine, Model# 44S977-0032-G1
Downloads
Features + Benefits
- Model# 44S977-0032-G1; 25 HP, 724cc twin cylinder engine with 1in. x 3 5/32in. vertical shaft
- Magnetron electronic ignition for fast, easy, effortless starts
- Ready Start system with electric start provides easy starts without the need to choke the engine
- Dura-Bore cast iron cylinder sleeve delivers extended life
- Premium Dual Clean air filtration system keeps the engine running clean
- Maintenance-free design
- Includes a fuel pump, oil filter and 16 Amp charging system
- Not for sale in CA
Key Specs
| Attribute | Specification |
|---|---|
item# | 73151 |
Brand | Briggs & Stratton |
Manufacturer's Warranty | 24 months parts/24months labor |
Ship Weight | 151.0 LB |
Engine Displacement | 724 cc |
Engine Type | Twin |
Shaft Diameter | 1 in |
Shaft Length | 3.15 in |
Fuel Type | Gasoline |
Start Type | Electric |
Shaft Keyway | 0.25 in |
Crankshaft | Vertical |
Cylinders (qty.) | 2 |
Cylinder Bore | Cast Iron |
Net Power Output | 25 HP |
Fuel Tank | No |
Oil Capacity | 2 qt |
Low Oil Shutdown | No |
Low Oil Alert | No |
Max. RPM | 3,300 |
| Attribute | Specification |
|---|---|
CARB Approved | No |
Shaft Rotation (From PTO Shaft Side) | Counter Clockwise |
Governor System | Mechanical |
Ignition System | Electronic |
Carburetor | Yes |
Lubrication System | Pressure |
Bearing Type | Plain |
Auto Compression Release | Yes |
Cooling System | Air |
Bore | 3.12 in |
Stroke | 2.89 in |
Air Cleaner Type | Dual Element |
Choke Control | Automatic |
Throttle Control | Remote |
Fuel Filter | Yes |
Charging System Amps | 16 |
Muffler Included | No |
Product Weight | 84.0000 lb |
Dimensions L x W x H (in.) | 18.81 x 18.0 x 15.0 in |
Reviews
Questions & Answers
Questions
-
· a year ago
need part number air filter, fuel filter and spark plugs also
-
ProductExpert11· 23 days ago
Helpful?
-
ProductExpert12· a year ago
We offer the spark plug, item 100696. For the other parts, please view the Service Parts list located on pages 10-11 of the Product Manual which is located below the Product Summary on the web page. These parts can be purchased through our sister company, Jacks Small Engines. Please visit www.JacksSmallEngines.com for pricing and availability.
Helpful?
-
-
· 5 years ago
It says it has a 64 quart oil capacity. Obviously this is incorrect. What is the actual capacity?
-
ProductExpert11· 23 days ago
The engine will require 62-64 ounces (2 quarts) of oil.
Helpful?
-
Stevie94· 5 years ago
64 oz (2 Quarts)
Helpful?
-
-
· 5 months ago
is this a replacement fit for 44u8770024g1?
1 answer-
ProductExpert12· 5 months ago
This engine is a direct replacement for engine model 44U877-0024-G1.
Helpful?
-
-
· a year ago
Does this motor come with the starter?
1 answer-
ProductExpert6· a year ago
The engine would include the electric starter.
Helpful?
-
-
· a year ago
can i replace my Engine Model # 44U8770011G1 with this engine?
1 answer-
ProductExpert12· a year ago
This engine does not have the correct shaft size to be a direct replacement for model 44U877-0011-G1. The appropriate replacement would be model 44S977-0033-G1, which is our item 75017.
Helpful?
-
-
· a year ago
How can I get a throttle control bracket l need the bracket and levels
1 answer-
ProductExpert6· a year ago
Replacement parts for the engine would be available through the manufacturer.
Helpful?
-
-
· 2 years ago
Where are the spark plugs located on this engine?
1 answer-
ProductExpert11· 2 years ago
The spark plug is located to the right of the oil dip stick. You will see the spark plug wire going to a small hole on the side of the engine where the spark plug is located.
Helpful?
-
-
· 2 years ago
Is this California compliant?
1 answer-
ProductExpert11· 2 years ago
The engine is not CARB compliant. It is unable to be sold to the state of California.
Helpful?
-
-
· 2 years ago
Is this a 6 pin ?
1 answer-
ProductExpert6· 2 years ago
The engine would be a 6 pin.
Helpful?
-
-
· 2 years ago
Dose it come with a warranty
1 answer-
ProductExpert11· 23 days ago
The engine will come with a 2 year limited consumer warranty or a 1 year limited commercial warranty through the manufacturer.
Helpful?
-
Accessories We Recommend
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.
Warranty
Manufacturer's Warranty
24 months parts/24months labor
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
Compare with Most Popular in Vertical Engines
See All Vertical Engines
See All Briggs & Stratton Vertical Engines
Currently Viewing This Product
$1149.99Shipping:
Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- $579.99
Shipping:
Factory shippedStore Pickup:
Not Available
Item # 75017
$1199.99Shipping:
Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
Item # 75015
$799.99Shipping:
Factory shippedStore Pickup:
Not available - online only
Specifications
724 cc
163 cc
724 cc
344 cc
Twin
GXV Series OHV Commercial-duty
Professional Series OHV
Intek OHV
1 in
7/8 in
1-1/8 in
1 in
3.15 in
3.18 in
4.29 in
3.15 in
Gasoline
Gasoline
Gasoline
Gasoline
Electric
Recoil
Electric
Electric and Recoil
0.25 in
-
0.25 in
0.25 in
Vertical
-
Vertical
1 x 3.15 In
2
1
2
1
Cast Iron
Cast Iron
Cast Iron
Cast Iron
25 HP
4.3 HP
25 HP
11.5 HP
No
Yes
No
No
2 qt
0.69 qt
2 qt
1.5 qt
No
-
No
No
No
-
No
No
3,300
3,600
3,400
3,300
No
-
No
No
Counter Clockwise
Counter Clockwise
Counter Clockwise
Counter Clockwise
Mechanical
Centrifugal Mechanical
Mechanical
Mechanical
Electronic
Electronic
Electronic
Electronic
Yes
Float
Yes
Yes
Pressure
Splash
Full Pressure
Splash
Plain
-
Ball
Plain
Yes
Yes
Yes
Yes
Air
Air
Air
Air
3.12 in
2.7 in
3.12 in
3.44 in
2.89 in
1.8 in
2.89 in
2.26 in
Dual Element
Dual Element
Single Element
Single Element
Automatic
Remote
Automatic
Automatic
Remote
Manual
Remote
Remote
Yes
-
Yes
Yes
16
-
16
3
No
Yes
No
Yes
84.0000 lb
lb
87.0000 lb
72.0000 lb
18.81 x 18.0 x 15.0 in
16.31 x 14.12 x 13.87 in
16.0 x 19.0 x 18.0 in
16.5 x 16.0 x 13.0 in
-
7.1 ft-lbs.
-
-
-
8.0:1
-
-
-
1.9 qt
-
-
-
8 in
-
-
See All Vertical Engines
See All Briggs & Stratton Vertical Engines
Recently Viewed Items
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.







