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

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Shipping:
Factory shippedStore Pickup:
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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
Reviews
Q & A
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Product Summary
What's Included
- (1) Engine with electric start
Downloads
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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· 6 months ago
What size is the key slot in the PTO shaft?
1 answer-
ProductExpert10· 6 months ago
Helpful?
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· a year ago
Is the crankshaft drilled and taped for a 7/16-20 bolt
1 answer-
ProductExpert11· a year ago
The engine shaft is drilled and tapped. The threads per inch is 7/16"-20.
Helpful?
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· 2 years ago
What are the mounting bolt dimensions
1 answer-
ProductExpert11· 2 years 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.
Helpful?
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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.
Helpful?
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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.
Helpful?
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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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· 6 years ago
What is the horse power rating?
1 answer-
ProductExpert13· 6 years ago
This Briggs & Stratton 500cc engine is rated at 17.5 HP.
Helpful?
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· 6 years ago
Where is this engine made? Is it made in China?
1 answer-
ProductExpert12· 6 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
A Northern Protection Plan is available after adding the product to your shopping cart.
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Specifications
500 cc
163 cc
25 cc
389 cc
Intek
OHV
GX Series OHC
GXV Series OHV Commercial-duty
1 in
7/8 in
-
1 in
3.15 in
3.15 in
-
3.11 in
Gasoline
Gasoline
Gasoline
Gasoline
Electric
Recoil
Recoil
Electric and Recoil
0.25 in
0.18 in
-
0.25 in
1 x 3.15 In
Vertical
-
D Type
1
1
1
1
Cast Iron
Aluminum
Cast Iron
Cast Iron
8.5:1
-
8:1
7.7:1
No
Yes
Yes
Yes
1.5 qt
0.5 qt
0.08 qt
1.2 qt
No
No
-
No
No
No
-
No
3,300
3,100
7,000
3,600
No
No
-
-
Counter Clockwise
Counter Clockwise
Counter Clockwise
Counter Clockwise
Mechanical
Mechanical
-
Centrifugal Mechanical
Electronic
Magnetron
Transistorized Magneto
Electronic
Float
Bowl Type
Diaphragm (overflow Return)
Float
Splash
Splash
Pressure
Pressure/splash
Plain
Plain
Ball
Ball
Yes
No
Yes
Yes
Air
Air
Air
Air
3.56 in
2.69 in
1.37 in
3.2 in
3.06 in
1.75 in
1 in
2.5 in
Dual Element
Single Element
Semi-dry
Dual Element
Manual
-
Manual
Remote
Remote
-
Manual
Remote
Yes
No
Yes
Yes
9
-
-
3
Yes
Yes
Yes
Yes
10 in
-
2.6 in
10 in
lb
23.0000 lb
lb
lb
19.0 x 16.0 x 13.0 in
13.4 x 10.25 x 9.95 in
7.6 x 8.7 x 9.1 in
17.0 x 15.0 x 15.87 in
-
1.09 qt
0.61 qt
2.2 qt
-
-
0.74 ft-lbs.
17.8 ft-lbs.
-
-
3.4 in
-
-
-
1 HP
10.2 HP
-
-
2.3 in
-
-
-
2.3 in
-
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