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31P707-0140-B2 Briggs and Stratton Engine - Overview

Diagrams for 31P707-0140-B2

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Engine Oil Seal – Part Number: 795387
$9.69
In Stock
Engine Oil Seal
★★★★★
★★★★★
(2)
Part #795387
This OEM Seal-Oil (PTO Side), also called the Oil Seal, is a Black, Nitrile Rubber, 2/14 O.D., individually sold part which is installed using a Seal Puller. Customers rate the installation difficulty as Medium. This part provides a seal around the crank shaft and engine block. When installing onto the engine block around the crank shaft, use something that makes contact around the entire seal, like a large socket or pipe, and tap into place evenly, ensuring that the housing is clean and dry. If the part is broken, likely due to fatigue, there will be leaking oil, and this part should be replaced using the model number on the original part to confirm it is the right fit for your model.
Plug-spark – Part Number: 491055S
$6.40
On Order
Plug-spark
★★★★★
★★★★★
(2)
Part #491055S
This spark plug is designed to provide reliable ignition and efficient fuel combustion in small engine applications. Built for consistent performance and durability, it helps maintain smooth operation, steady power output, and easier starting. Ideal for routine maintenance or replacement, it supports dependable engine performance in lawn and garden equipment, generators, and similar outdoor power machines.
Gasket-rocker Cover – Part Number: 272475S
No Longer Available
Gasket-rocker Cover
Part #272475S
This OEM Gasket Rocker Cover, which can also be called the Valve Cover Gasket, is used to provide a seal between the valve cover and engine. This is a gray-colored part, measuring 5 1/2 x 4 Inch, and it is sold individually. It can be attached using a wrench or socket. Note: this part also requires a Torque Wrench. When installing, tighten and torque in alternating patterns, following the manufacturer specficiations. You will know when it needs to be replaced when there is oil leaking around the valver cover gasket, which is a sign the part is broken, likely due to simple wear and tear or constant dryness. To make sure you are purchasing the right part, check your model number. Customers rated this repair as easy.
Engine Oil Seal – Part Number: 391086S
$8.09
In Stock
Engine Oil Seal
★★★★★
★★★★★
(1)
Part #391086S
The Oil Seal is a manufacturer-approved rubber part which provides a seal between the crankcase and crankshaft by attaching around the axle shaft on the crankhouse housing. Installation is rated as "Medium" difficulty and requires a screw driver, wrench set and seal puller. A broken seal will cause a leak, and the part must be replaced. Refer to your make, model and diagram to ensure you're choosing the right part. This part comes in black and gray.
Engine Cylinder Head Gasket – Part Number: 796584
$26.46
In Stock
Engine Cylinder Head Gasket
★★★★★
★★★★★
(1)
Part #796584
This is a replacement cylinder head gasket for your small engine. It is approximately 5 inches in width and 6 inches in length. The cylinder head gasket helps to create a seal for the cylinder head. If you have oil leaking, or you hear a hissing sound when your engine is in use, you may have a blown head gasket. This part is sold individually and is an OEM part sourced directly from the manufacturer.
Engine Oil Filter – Part Number: 696854
$17.25
In Stock
Engine Oil Filter
Part #696854
This genuine OEM oil filter helps to remove harmful contaminants from engine oil. It is designed for a variety of Engines. It is sold Individually. This part maintains optimum performance of your engine in accordance with applicable EPA emissions regulations. It is recommended to replace an Oil Filter at least once a season.
Fan-flywheel – Part Number: 796201
$43.34
In Stock
Fan-flywheel
★★★★★
★★★★★
(6)
Part #796201
This is a genuine OEM sourced replacement part flywheel fan. It is specially manufactured for use with Briggs and Stratton engines that are installed on lawn and garden equipment. This fan is attached to the fly wheel and it will help to keep the engine cool for optimum performance. This blower fan is made out of plastic and it is sold individually. Please note the bolt used to secure this fan is sold separately. To complete this repair you will need a screwdriver and a wrench.
Gasket Set-valve – Part Number: 794152
$44.73
In Stock
Gasket Set-valve
★★★★★
★★★★★
(1)
Part #794152
This gasket set-valve is supplied by the original equipment manufacturer for use with Briggs and Stratton engines commonly installed on lawn and garden equipment. It helps to distribute the pressure evenly and provide an air-tight seal for the cylinder head. Over time components may wear out and begin to crack eventually requiring replacements. For the exact locations and the correct applications, please refer to the appropriate diagrams of your model. This high-quality set includes five composite material gaskets and one valve seal. You will need a wrench set to remove and reattach the cylinder head to perform this repair.
Gasket-exhaust – Part Number: 692236
$6.47
In Stock
Gasket-exhaust
Part #692236
This OEM exhaust gasket in lawn and garden equipment creates a seal between the engine block and the muffler or exhaust pipe so that exhaust gases do not leak. This is 3.30cm in diameter and 6.35cm in length. Your machine may have a loud hissing or popping sound coming from the exhaust area if the gasket was faulty. You may also notice the presence of black soot around the gasket or the exhaust. Your gasket needs to be replaced if it appears worn or deformed. Otherwise, your machine will experience exhaust leaks. To detach the gasket, remove the fasteners that secure it using a socket or wrench. You can detach the gasket from your machine afterwards. Please bear in mind that this replacement part is sold individually.
Tube-breather – Part Number: 794683
$13.02
In Stock
Tube-breather
Part #794683
This item is an authentic OEM replacement part that is intended to be used with small engines from Briggs & Stratton. The breather tube is used to guide the direction of excess gasses and fluid that escape the engine from a higher level of internal pressure. The breather tube is a single item, please see the model diagram for related parts.
Seal-o Ring – Part Number: 691917
$6.40
In Stock
Seal-o Ring
★★★★★
★★★★★
(1)
Part #691917
The Seal-O Ring, also known as the gasket, is red in color, made of rubber, and is an OEM part that requires some skill to replace. This part is designed to create a seal between the carburator and manifold, to prevent air from entering. If your engine loses power, creates a hissing noise, or if the gasket appears damaged or your engine running improperly it may be time to replace the part. If you run the engine and spray the outside of the carburator with soapy water, you can test whether or not the gasket is leaking by listening to the sounds produced. If the sound smooths out then you've found your leaky gasket. Damage may occur over time, especially if the part dries out, and make the part appear stretched or worn out. When making this medium-difficulty repair, make sure the new gasket is fitted properly between the carburetor and intake manifold.
Rod-push – Part Number: 692003
$11.08
In Stock
Rod-push
★★★★★
★★★★★
(2)
Part #692003
This is an Genuine OEM replacement part used on a variety of Lawn and Garden Engines. This part is made out of Metal and it is sold individually. The Push Rod rides on the camshaft to push the exhaust valve open during the exhaust stroke. A bent pushrod can not only affect your engine's performance, it can seriously damage other parts if the problem is not taken care of immediately.

Common Symptoms of the 31P707-0140-B2

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My Briggs & Strattan (Troy Bilt) riding mover had broken vanes(blades) on the engine.
10 of 17 people found this instruction helpful.
  • William from SPRING GREEN, WI
  • Really Easy
  • 30 - 60 mins
  • Screw drivers, Socket set, Wrench (Adjustable)
I went to Troy-Bilt first first for the part-nothing, then B&S engine, still no help surfing their websites for this part. Again, no help. Before giving up completely I thought about all the parts I have bought from PartSelect for washers and such. Typed in "Fan-Flywheel" B&S. First thing that popped up was a picture of this part. All my searching on Troy-Bilt mower site and B&S site for over two hours with no results, and then I go to PartSelect and without my model number or anything else, they had it and even displayed my model number and sent it right away, popped it in and the mower is working fine as ever. No matter what you need, I say save yourself a lot of time and just go here first. I'm a loyal member of PartSelect for over six years!!!
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Stopped running. Turned to be a bent intake push rod and broken rocker arm
9 of 15 people found this instruction helpful.
  • Rene from COVINGTON, LA
  • Really Easy
  • 1- 2 hours
  • Nutdriver, Socket set, Wrench set
Removed head. Replaced both rocker arms, intake pus rod, push rod guide exhaust and head gaskets. Torqued head in 3 stages to 216 in/lbs. gapped intake to .004 and exhaust to .006 at TDC

Added oil and gas. Now running great

If you need to replace push rods use steel (exhaust) they are the same length
The engine was a Briggs & Stratton 217802 0113 E10604 (2006 year date code)
I used the following
796189 gasket
272475S gasket
697494 push rod
690822 push rod guide
691751 rocker arms
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Old fan broke from previous owner
3 of 7 people found this instruction helpful.
  • Carmen from APPLE VALLEY, MN
  • Easy
  • 15 - 30 mins
  • Socket set
Used this an old (maybe a 2007?) Briggs and Stratton 17.5 ho engine.This fan wasn’t an exact replica of the old one. But the bolt holes were in the right spot and it was the right size. Had to drill out the little dimples for the bolts and the fan guard that goes on top to stop debris didn’t screw directly into the fan like the old one. B ut I was able to attach the guard to the engine cover/piece that houses the air filter with a plastic bracket/retainer that was already on the engine. Overall, easy install and fit just fine once I determined how I wanted to attach the fan guard
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