Models > 407777

407777 ((3285-B2)) Briggs and Stratton Engine - Overview

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Engine Kit – Part Number: 407777
Engine Kit
This part number matches the current model number 407777
PartSelect #: PS11956501
Manufacturer #: 407777
  No Longer Available
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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
Seal--Oil (PTO Side) – Part Number: 795387
Seal--Oil (PTO Side)
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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
Seal,Oil – Part Number: 391086S
Seal,Oil
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
Seal-O Ring – Part Number: 691917
Seal-O Ring
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PartSelect #: PS9294749
Manufacturer #: 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 ma...
$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
Pump-Fuel – Part Number: 808656
Pump-Fuel
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PartSelect #: PS9154486
Manufacturer #: 808656
$113.45
  On Order
Key-Flywheel – Part Number: 222698S
Key-Flywheel
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PartSelect #: PS8925657
Manufacturer #: 222698S
$4.99
  In Stock
Oil Filter – Part Number: 696854
Oil Filter
PartSelect #: PS9065087
Manufacturer #: 696854
$14.38
  In Stock
Crankcase Gasket With Bolts – Part Number: 594195
Crankcase Gasket With Bolts
PartSelect #: PS11829358
Manufacturer #: 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...
$37.66
  In Stock
Gasket-Exhaust – Part Number: 690970
Gasket-Exhaust
PartSelect #: PS9063564
Manufacturer #: 690970
$5.34
  In Stock
Gasket-Intake – Part Number: 690949
Gasket-Intake
PartSelect #: PS9063610
Manufacturer #: 690949
$3.99
  In Stock

Questions And Answers for 407777

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Common Symptoms of the 407777

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Engine misfires
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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.
Parts Used:
Cylinder Head
  • D from HUNTSVILLE, AL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Nutdriver, Socket set
11 of 12 people found this instruction helpful.
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governor not working
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 to 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
Parts Used:
Crankcase Gasket With Bolts Seal--Oil (PTO Side) Gear-Governor
  • rodney from MUSCATINE, IA
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    More than 2 hours
  • Tools:
    Screw drivers, Socket set
12 of 18 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.
Parts Used:
Gear-Governor
  • John from BROOKVILLE, IN
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Pliers, Socket set, Wrench set
5 of 8 people found this instruction helpful.
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