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40R577 (0013-H1) Briggs and Stratton Engine - Overview
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$9.69
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Engine Oil Seal
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 shaf...Read moret, 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.
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$8.09
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Engine Oil Seal
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. R...Read moreefer to your make, model and diagram to ensure you're choosing the right part. This part comes in black and gray.
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$30.09
In Stock
Engine Cylinder Head Gasket
Part #693997
This is a replacement cylinder head gasket for your small engine. The gasket is approximately 5 inches in length and 5 inches in width at its longest and widest points. The gasket creates a seal, and the seal allows combustion to occur, making your engine run at peak performance. If the gasket is damaged or coming apart, you may notice a ...Read moredecrease in the power and performance of your engine. When you remove the old gasket, be sure that the surface you are attaching the new one to is completely clean, so the seal will be effective. This part is sold individually and it is a genuine OEM part.
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$53.18
In Stock
Crankcase Gasket With Bolts
Part #594195
This genuine crankcase gasket is used on small lawn and garden engines. Its purpose is to make an air tight seal so that no air/oil leakage occurs. Over time this gasket will deteriorate and will need to be replaced. It is made out of composite material and it is sold individually. To complete this repair you will need a wrench. Includes ...Read moreone (1) gasket and ten (10) bolts. This will need to be tightened with torque to 300 inch pounds.
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$6.40
In Stock
Key-flywheel
Part #222698S
This is a Genuine OEM replacement part used on a variety of Lawn and Garden equipment. The key helps to secure Flywheel in place. This is a Metal Key and it is Sold Individually. You would need Pliers to replace this item.
$15.13
In Stock
Filter-oil
Part #492932S
This short-style engine oil filter is designed to remove harmful contaminants from the oil while maintaining proper lubrication in pressure-lubricated small engines. Built with high-efficiency filtration media and internal safety features to support consistent oil flow, it helps reduce engine wear and protect internal components. Ideal fo...Read morer routine maintenance, it supports reliable performance and helps extend engine life during regular operation.
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$6.40
In Stock
Gasket-exhaust
Part #690970
This is a genuine OEM sourced replacement exhaust gasket. It is specially made for use with Briggs and Stratton engines commonly used on Toro lawn and garden equipment. Its purpose is to provide an air-tight seal between the carburetor and the exhaust tube. Over time this gasket will deteriorate requiring replacement. Please note, this co...Read moremposite gasket is sold individually. To replace this part you will need a wrench.
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$40.69
Special Order
Gear-governor
Part #793338
This gear-governor is a special component that helps to engage the drive shaft. It is a genuine Briggs and Stratton item that is supplied by the original manufacturer for use with small engines that are commonly installed on a variety of lawn and garden equipment. It provides an identical replacement for a damaged or a missing hardware th...Read moreat was installed on a new unit. Check the diagrams for your model for the exact location and the correct installation of this part. One durable metal gear-governor is included. You may need a screwdriver and a wrench set to perform this repair.
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$7.88
In Stock
Gear-pinion
Part #695708
This is a manufacturer approved starter pinion gear designed for use with lawn and garden equipment engines. This Starter pinion gear is attach to the starter clutch drive and engages the flywheel to start the engine. It is made out of Plastic and Aluminum and it is Sold Individually.
$6.40
In Stock
Gasket-intake
Part #690949
It is an authentic part that is supplied by the original equipment manufacturer for use with Briggs and Stratton engines commonly installed on lawn and garden equipment. The purpose of this gasket is to provide a tight seal for the intake manifold, unfortunately, over time the material will wear out and may begin to fail eventually requir...Read moreing a replacement to maintain top performance. Please make sure to refer to the appropriate diagrams of your model for the correct location and application of this hardware. Keep in mind this high-quality item is made of durable composite material and is sold individually.
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$12.92
In Stock
Gasket-float Bowl
Part #698781
This is a genuine manufacturer sourced replacement part designed for lawn and garden equipment engines. This gasket provides an air-tight seal for the float bowl. Over time this gasket will shrink, become brittle and crack allowing for air leaks. At that time it should be replaced. It is made out of rubber material and it is sold individually. Replacing this item you would need a screwdriver.
$6.40
In Stock
Screw
Part #691108
This is an authentic OEM sourced replacement part that is intended to be used with lawnmower engines and outboard motors from Briggs & Stratton and Toro. The metal screw is used to secure the rocker cover to the cylinder head assembly. This item is available as an individual replacement part.
Common Symptoms of the 40R577
How this model fails, and the parts that fix it.
See how others fixed this model. Time, tools, difficulty, and steps that lead to victory!
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governor not working
18 of 30 people
found this instruction helpful.
Had to pull the engine off the rider mower. Drained the oil took shield off the flywheel. Set it upside down on a 5 gal bucket. Took a 7/16 hand wrench to remove governor lever from bottom of engine. Left it in its location. Pulled 10 1/2 " bolts. Split engine case. Found the old governor had broke into pieces. Had to use a magnet t
... Read more
o remove all the pieces. Removed the small clip and removed gear. Lubed shaft slid new on put new clip on. Lined governor weights with center piece tapped it in place very lightly. Cleaned gasket flanges pulled the shaft seal. Used the old seal as a seal driver. When putting the cover back on make sure the seal dont roll out. Take a mini screwdriver and tuck it in around shaft. Put bolts back in and tighten like instructions
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