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49R977 (0010-G1) Briggs and Stratton Engine - Overview

Diagrams for 49R977

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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.
Gasket-exhaust – Part Number: 690970
$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 composite gasket is sold individually. To replace this part you will need a wrench.
Gear-governor – Part Number: 793338
$40.69
Special Order
Gear-governor
★★★★★
★★★★★
(1)
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 that 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.
Gasket-intake – Part Number: 690949
$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 requiring 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.
Screw – Part Number: 691108
$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.
Hose-vacuum – Part Number: 791766
$10.60
In Stock
Hose-vacuum
Part #791766
This genuine part is sourced directly from the original equipment manufacturer. It is specially designed for use with Briggs and Stratton engines commonly installed on lawn and garden equipment. The purpose of this hose is to transfer vacuum from the engine. Unfortunately, over time the material may wear out and begin to crack eventually requiring a replacement. Make sure to check the diagrams of your model for the exact location and the correct installation of this part. Note, this item includes one durable rubber hose and two metal clamps to secure it.
Seal-valve – Part Number: 690968
$15.97
Special Order
Seal-valve
Part #690968
This is a genuine OEM part. The Briggs & Stratton valve seal is used on many lawn tractor machines. The metal part stops oil from moving into the cylinder from the valve stem. This item is often fastened to the intake valve and the valve keeper. A screwdriver, socket set and wrench set are required for the installation. The metal valve seal is sold individually.
Clamp-hose – Part Number: 791850
$6.40
In Stock
Clamp-hose
Part #791850
This is a genuine manufacturer-sourced part which is designed for use on lawn and garden equipment. It is an identical replacement for a missing or a damaged clamp that is used to secure the hose. Keep in mind this high-quality product is made of durable metal and is sold individually. Please make sure to check the appropriate diagrams for your model for the correct location and application of this hardware.
Plug-spark – Part Number: 792015
$9.03
In Stock
Plug-spark
Part #792015
This is a genuine replacement part manufactured for use with small engines. The spark plug is used to fire the air-fuel mixture inside the cylinder. This spark plug is available as an individual replacement part, please see model diagram for associative parts.
Key-flywheel – Part Number: 796335
$8.89
In Stock
Key-flywheel
Part #796335
This item is a genuine Briggs & Stratton replacement part that has been sourced from the original manufacturer to be used with small engines. The metal key fits into the slot on the crankshaft and aligns with the keyway in the flywheel. This key allows the flywheel to rotate in unison with the crankshaft. The flywheel key is sold individually.
Gasket-float Bowl – Part Number: 690994
$8.67
In Stock
Gasket-float Bowl
Part #690994
This is a genuine manufacturer sourced replacement part that is specially designed for Briggs and Stratton engines commonly installed on Toro lawn and garden equipment. The purpose of this gasket is to create an air-tight seal for the float bowl, over time it may deteriorate, become brittle and crack eventually requiring replacement to maintain peak performance. It is made from high quality rubber material and it is sold individually.
Screw – Part Number: 691061
$6.40
In Stock
Screw
Part #691061
This is an authentic OEM component from Briggs & Stratton. The magneto armature screw is compatible with many lawn and garden engines. The hardened metal screw helps to mount the magneto armature. A wrench is required for the removal and installation. The magneto armature screw is sold individually. It is recommended to refer to engine manual and diagrams for further instruction.

Common Symptoms of the 49R977

How this model fails, and the parts that fix it.

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Bad governor
12 of 24 people found this instruction helpful.
  • John from BROOKVILLE, IN
  • Easy
  • 1- 2 hours
  • Nutdriver, Pliers, Socket set, Wrench set
Look on YouTube for video's on how to replace a Briggs governor. There are several there. My favorite, with best explanation, is, "Easily Replace Briggs Governor Gear (V-Twin Intek Engine) with Taryl". https://www.youtube.com/watch?v=wn3eanGxSEA&t=152s.

Taryl (probably not his real name) does a very good job of showing step-by- step the whole procedure, along with some additional hints/tricks/techniques of value.

Not including oil and filter, I spent less than $50 for a new governor, gasket, and drive shaft seal. That's all that is really necessary to replace is those three parts. That is, unless pieces of the old governor tore up a gear, valve, or something else. Inspect everything! {I was lucky and only the governor was destroyed}

One word of note. Be sure to clean out all of the debris from the blown governor. Be sure to remove the spark plugs and carefully rotate the drive shaft while looking for nooks-and-crannies where debris can hide. I tried to use a magnet to help, but it didn't help much, even though the block is aluminum.

Good luck.
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