The PTO shaft on the Briggs & Stratton 31R907‑0007‑G1 uses a standard 1/4‑inch (0.250 in) key slot.
Briggs & Stratton Powerbuilt OHV Vertical Engine, 500cc, 1in. x 3 5/32in. Shaft, Electric Start, Model# 31R907-0007-G1

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- Dura-Bore™ cast iron cylinder sleeve for extended life
- Maintenance-free Magnetron® electronic ignition and float carburetor for consistent, easy starts
- Dual-Clean™ dual-element air cleaner for maximum protection
- Patented balancing system for smoother performance
- Gear-driven DuraLube™ splash lubrication bathes all internal engine parts with oil
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Description
Key Specs
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Product Summary
What's Included
- (1) Engine with electric start
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Features + Benefits
- Dura-Bore™ cast iron cylinder sleeve for extended life
- Maintenance-free Magnetron® electronic ignition and float carburetor for consistent, easy starts
- Dual-Clean™ dual-element air cleaner for maximum protection
- Patented balancing system for smoother performance
- Gear-driven DuraLube™ splash lubrication bathes all internal engine parts with oil
- Tool-less air filter cover for easy access
- Heavy-duty Teflon sleeve bearing withstands load and reduces wear
- Automotive dipstick makes checking oil levels easy
- Not for sale in CA
Key Specs
| Attribute | Specification |
|---|---|
item# | 42552 |
Brand | Briggs & Stratton |
Manufacturer's Warranty | 2 year limited warranty |
Ship Weight | 78.0 LB |
Engine Displacement | 500 cc |
Engine Type | Intek |
Shaft Diameter | 1 in |
Shaft Length | 3.15 in |
Fuel Type | Gasoline |
Start Type | Electric |
Shaft Keyway | 0.25 in |
Crankshaft | 1 x 3.15 In |
Cylinders (qty.) | 1 |
Cylinder Bore | Cast Iron |
Compression Ratio | 8.5:1 |
Fuel Tank | No |
Oil Capacity | 1.5 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 | Float |
Lubrication System | Splash |
Bearing Type | Plain |
Auto Compression Release | Yes |
Cooling System | Air |
Bore | 3.56 in |
Stroke | 3.06 in |
Air Cleaner Type | Dual Element |
Choke Control | Manual |
Throttle Control | Remote |
Fuel Filter | Yes |
Charging System Amps | 9 |
Muffler Included | Yes |
Bolt Circle | 10 in |
Product Weight | lb |
Dimensions L x W x H (in.) | 19.0 x 16.0 x 13.0 in |
Reviews
Questions & Answers
Questions
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· a month ago
What size is the key slot in the PTO shaft?
1 answer-
ProductExpert10· a month ago
Helpful?
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· 9 months ago
Is the crankshaft drilled and taped for a 7/16-20 bolt
1 answer-
ProductExpert11· 9 months ago
The engine shaft is drilled and tapped. The threads per inch is 7/16"-20.
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· a year ago
What are the mounting bolt dimensions
1 answer-
ProductExpert11· a year ago
The mounting bolt size is 3/8". The mounting bolt dimensions are 5 3/4" (carburetor side), 7" (opposite side) x 7 3/4" front to back.
Helpful?
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· 2 years ago
What does 0007-G1 mean
1 answer-
ProductExpert23· 2 years ago
The “0007-G1” in the Briggs & Stratton engine model number (31R907-0007-G1) is a specific code that helps identify the engine’s configuration and features. The “G1” typically indicates the color of the blower housing on this engine.
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· 2 years ago
Does this engine have gravity feed for fuel or is it a fuel pump
1 answer-
ProductExpert6· 2 years ago
The engine would have gravity feed for the fuel.
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· 2 years ago
what type of oil dose it need
1 answer-
ProductExpert7· 2 years ago
This will use a 10w-30 engine oil. Please view item #1707002 for a compatible oil.
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· 3 years ago
Could you tell me where is width is measured at? Looking for a repower option that needs to be less than 13 inches at the base but have lots more room a few inches up. Also need vertical shaft, electric start, and cable throttle...
1 answer-
ProductExpert6· 3 years ago
The 16" is measured across from the air filter to the oil cap on the engine. It is an electric start and has a remote throttle control.
Helpful?
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· 3 years ago
Does this engine have an oil filter
1 answer-
ProductExpert6· 3 years ago
The engine would have an oil filter.
Helpful?
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· 5 years ago
What is the horse power rating?
1 answer-
ProductExpert13· 5 years ago
This Briggs & Stratton 500cc engine is rated at 17.5 HP.
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· 5 years ago
Where is this engine made? Is it made in China?
1 answer-
ProductExpert12· 5 years ago
This Briggs & Stratton engine is manufactured in the United States.
Helpful?
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Warranty
Manufacturer's Warranty
2 year limited warranty
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
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Specifications
500 cc
389 cc
724 cc
724 cc
Intek
GXV Series OHV Commercial-duty
V-twin OHV
Professional Series OHV
1 in
1 in
1 in
1-1/8 in
3.15 in
3.11 in
3.15 in
4.29 in
Gasoline
Gasoline
Gasoline
Gasoline
Electric
Electric and Recoil
Electric
Electric
0.25 in
0.25 in
0.25 in
0.25 in
1 x 3.15 In
-
Vertical
Vertical
1
1
2
2
Cast Iron
Cast Iron
Cast Iron
Cast Iron
8.5:1
7.7:1
-
-
No
Yes
No
No
1.5 qt
1.2 qt
2 qt
2 qt
No
-
No
No
No
No
No
No
3,300
3,600
3,300
3,400
No
-
No
No
Counter Clockwise
Counter Clockwise
Counter Clockwise
Counter Clockwise
Mechanical
Centrifugal Mechanical
Mechanical
Mechanical
Electronic
Electronic
Electronic
Electronic
Float
Float
Yes
Yes
Splash
Pressure/splash
Full Pressure
Full Pressure
Plain
-
Ball
Ball
Yes
-
Yes
Yes
Air
Air
Air
Air
3.56 in
3.2 in
3.12 in
3.12 in
3.06 in
2.5 in
2.89 in
2.89 in
Dual Element
Dual Element
Single Element
Single Element
Manual
Remote
Automatic
Automatic
Remote
Remote
Remote
Remote
Yes
Yes
Yes
Yes
9
3
16
16
Yes
Yes
No
No
10 in
10 in
-
-
lb
lb
91.0000 lb
87.0000 lb
19.0 x 16.0 x 13.0 in
17.0 x 15.0 x 15.87 in
19.12 x 18.0 x 15.5 in
16.0 x 19.0 x 18.0 in
-
17.8 ft-lbs.
-
-
-
10.2 HP
25 HP
25 HP
-
2.2 qt
-
-
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