120H02-0100-B1 Briggs and Stratton Engine - Overview

Sections of the 120H02-0100-B1

[Viewing 4 of 4]
Keep searches simple, eg. "belt" or "pump".
Seal-o Ring – Part Number: 270344S
Seal-o Ring
PartSelect #: PS8936675
Manufacturer #: 270344S
This authentic OEM replacement part fits a variety of Toro and Briggs & Stratton engines. An O ring is used to retain pressure between rigid parts. Its flexible material allows it to create a tight se...
$5.95
  In Stock
Rep Man-1 Cyl L-hd – Part Number: 270962
Rep Man-1 Cyl L-hd
PartSelect #: PS8937789
Manufacturer #: 270962
This is a genuine item that is supplied directly from the original equipment manufacturer for Briggs and Stratton engines commonly installed on lawn and garden equipment. The repair manual contains ea...
$51.95
  Special Order
Key-flywheel – Part Number: 222698S
Key-flywheel
PartSelect #: PS8925657
Manufacturer #: 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 Plier...
$5.95
  In Stock
Link-mech Governor – Part Number: 691829
Link-mech Governor
PartSelect #: PS9074261
Manufacturer #: 691829
$15.95
  Special Order
Engine Spark Plug Boot – Part Number: 66538S
Engine Spark Plug Boot
PartSelect #: PS9055852
Manufacturer #: 66538S
This spark plug boot is a genuine OEM Briggs & Stratton replacement designed to fit securely over the spark plug, protecting the connection from moisture, dirt, and debris. Its durable, elbow-style de...
$6.95
  Special Order
Washer-sealing – Part Number: 271716
Washer-sealing
PartSelect #: PS8940580
Manufacturer #: 271716
This authentic OEM sealing washer is designed for your lawn equipment to create a tight seal within the carburetor body, preventing fuel or air leaks. If you notice any signs of leaks, such as drippin...
$6.95
  In Stock
Pin-piston/std – Part Number: 298909
Pin-piston/std
PartSelect #: PS8942667
Manufacturer #: 298909
$15.95
  Special Order
Valve-exhaust – Part Number: 590394
Valve-exhaust
PartSelect #: PS9036012
Manufacturer #: 590394
This is an original Briggs & Stratton and Toro part for use in engines, generators, and lawn mowers. The exhaust valve goes next to the valve spring. This item is sold individually and is made of meta...
$43.95
  Special Order
Valve-throttle – Part Number: 696564
Valve-throttle
PartSelect #: PS9076856
Manufacturer #: 696564
Used With Plastic Throttle Shaft
$15.95
  Special Order
Spacer-fuel Tank – Part Number: 692294
Spacer-fuel Tank
PartSelect #: PS9063748
Manufacturer #: 692294
This is a genuine Briggs & Stratton replacement part. The fuel tank spacer is constructed of durable plastic, and is designed for use with many lawn and garden engines. This item is made to fit betwee...
$8.95
  Special Order
Screw – Part Number: 690912
Screw
PartSelect #: PS9064499
Manufacturer #: 690912
It is a genuine OEM sourced replacement screw which is specially designed for use with Briggs and Stratton engines commonly installed on lawn and garden equipment. Please refer to the appropriate diag...
$6.95
  Special Order
Screw – Part Number: 691061
Screw
PartSelect #: PS9063630
Manufacturer #: 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 w...
$5.95
  Special Order

Questions And Answers for 120H02-0100-B1

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Common Symptoms of the 120H02-0100-B1

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Will Not Start
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Cannot pull starter cord out or engine will not turn over
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Engine will not idle
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
starter rewind cord broke
I found the model number of the Briggs & Stratton engine on the inside of the engine housing. Ordered a new starter-rewind unit, as the old cord broke and the thing was well worn. The instructions were clear enough, but to get the old starter off I had to drill out four rivets, which just spin around when you try. I used a hacksaw, chisel, pliers, whatever worked on each rivet; this took a while. When they were finally removed, the new starter pull unit was relatively easy to install with the small nuts and bolts provided. On the Yard Machines log splitter, putting back the engine housing is quite tricky; you have to jostle the thing into place, get the pull handle above the cover and line up the bolt holes.
Parts Used:
Engine Recoil Starter Assembly
  • Seikai from MARICOPA, CA
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Pliers, Screw drivers, Socket set, Wrench (Adjustable), Wrench set
15 of 21 people found this instruction helpful.
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Mower was submerged in Hurricane Matthew
Total disassemble, clean out water and any rust. hone cylinder, wire brush where needed,reassemble with new rings,gaskets and seals and lucas oil product. Started on second pull. Mowed lawn. If you have never done this sort of work before, probably should not attempt.
Parts Used:
Ring Set Engine Gasket Set Filter- A/C Cartridge Filter-a/c Foam
  • Morris from HOPE MILLS, NC
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    More than 2 hours
  • Tools:
    Wrench set
25 of 51 people found this instruction helpful.
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Mower body was die cast and in good condition. Engine was burning oil.
Removed engine, no specialty tools required. Honed the cylinder, and lapped the valves. Tip on compressing valve spring for reassembly; compress springs with you finger and tie them with 2 zip ties, cut the zip ties after installing the keepers. Repainted the mower deck and engine. It runs and looks like new. My Toro is a 1999 model .
Parts Used:
Engine Gasket Set Ring Set-std
  • Robert from TEGA CAY, SC
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    More than 2 hours
5 of 8 people found this instruction helpful.
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