Models > 40T877

40T877 Briggs and Stratton Engine - Overview

Models starting with 40T877

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Aluminum Push Rod – Part Number: 690982
Aluminum Push Rod
PartSelect #: PS9073139
Manufacturer #: 690982
This is a replacement push rod for your lawn tractor engine. It is made of aluminum and is the push rod used for the exhaust valve. Occasionally, the push rod in your engine can become damaged, and wi...
$8.27
  In Stock
Rod-Push (Steel) – Part Number: 690981
Rod-Push (Steel)
★★★★★
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(1)
PartSelect #: PS9062983
Manufacturer #: 690981
This is a replacement steel push rod for your lawn tractor engine. The engine will have two push rods; one made of steel, and one made of aluminum. This part is made of steel and is approximately 6 in...
$6.89
  On Order
Starter Pawl-Ratchet – Part Number: 281505S
Starter Pawl-Ratchet
PartSelect #: PS8942598
Manufacturer #: 281505S
The manufacturer-approved Ratchet Pawl (Starter Pawl) comes in a set of two (2). This part attaches inside the recoil assembly, and is used to engage the flywheel. if broken due to wear/damage it will...
$3.99
  In Stock
Seal--Oil (PTO Side) – Part Number: 795387
Seal--Oil (PTO Side)
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(2)
PartSelect #: PS9151828
Manufacturer #: 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...
$7.88
  In Stock
Gasket-CylinderHead – Part Number: 693997
Gasket-CylinderHead
PartSelect #: PS9067184
Manufacturer #: 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 ...
$26.91
  In Stock
Plug-Spark – Part Number: 491055S
Plug-Spark
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(2)
PartSelect #: PS9281094
Manufacturer #: 491055S
$4.99
  In Stock
Seal,Oil – Part Number: 391086S
Seal,Oil
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(1)
PartSelect #: PS9277860
Manufacturer #: 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 "M...
$6.59
  In Stock
Key-Flywheel – Part Number: 222698S
Key-Flywheel
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(1)
PartSelect #: PS8925657
Manufacturer #: 222698S
$4.99
  In Stock
Cylinder Head – Part Number: 796231
Cylinder Head
PartSelect #: PS9152257
Manufacturer #: 796231
This is a replacement cylinder head kit for your small engine. It contains everything you will need to replace a damaged cylinder head. This is a 12-piece kit that is sold as a unit. This is an OEM pa...
$181.00
  On Order
Oil Filter – Part Number: 696854
Oil Filter
PartSelect #: PS9065087
Manufacturer #: 696854
$14.38
  On Order
Pump-Fuel – Part Number: 808656
Pump-Fuel
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(1)
PartSelect #: PS9154486
Manufacturer #: 808656
$113.45
  On Order
Gasket-Exhaust – Part Number: 690970
Gasket-Exhaust
PartSelect #: PS9063564
Manufacturer #: 690970
$5.34
  In Stock
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Common Symptoms of models starting with 40T877

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Engine misfires
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
the head blew a vaulve guide destoying push rods
about 6 hours to tear down and replace don't do it in the hot sun needed more breaks takes longer, but the new factory heads did it started up 185 lbs of compression almost back to new, so much more power than old one's. FYI take off the motor cover every year clean out the debris (grass-mouse nest- and oil) it blocks the air and COOKS THE HEAD it only takes short time and will make that motor last a little longer but it is a BRIGGS engine
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Parts Used:
Cylinder Head Cylinder Head Aluminum Push Rod Rod-Push (Steel)
  • Robert from WHITMAN, MA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    More than 2 hours
19 of 26 people found this instruction helpful.
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Engine quit due to valve guide sliding out causing rocker arm to be immovable resulting in bent push rods.
Clean engine with a Gunk type product. Remove valve cover. Loosen bolts and remove old cylinder head. One bolt is located inside valve cover area. Remove old gasket and inspect and clean that surface. Attach new head with new gasket using existing bolts. Torque to 18'#s with a cross type pattern. Attach new rocker arms and push rods. Set valve clearance to .004 - .006. Attach valve cover with gasket. Check oil level. Start and let it warm up. Let cool remove cover then check valve clearance again. Replace cover.
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Parts Used:
Cylinder Head
  • D from HUNTSVILLE, AL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Nutdriver, Socket set
11 of 13 people found this instruction helpful.
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Bad governor
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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Parts Used:
Gear-Governor
  • John from BROOKVILLE, IN
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Pliers, Socket set, Wrench set
6 of 10 people found this instruction helpful.
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