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121Q07 Briggs and Stratton Engine - Overview

Models starting with 121Q07

Keep searches simple, eg. "belt" or "pump".
Kit-needle/seat – Part Number: 398188
Kit-needle/seat
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(1)
PartSelect #: PS8963322
Manufacturer #: 398188
This needle and seat kit, also known as a float valve, is found in many types of liquid-fueled lawn equipment, such as carburetors. The valve regulates the flow of fuel into the float bowl. The needle...
$8.91
  In Stock
Order now and your part arrives by Apr 6
Engine Crankcase Gasket – Part Number: 692232
Engine Crankcase Gasket
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(1)
PartSelect #: PS9066140
Manufacturer #: 692232
This part is the replacement gasket for the crankcase on your engine. The gasket helps to create a seal on the crankcase and prevent leaks. If you notice that your engine is not running at peak perfor...
$7.86
  In Stock
Order now and your part arrives by Apr 6
Bowl-float – Part Number: 796611
Bowl-float
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(1)
PartSelect #: PS9306908
Manufacturer #: 796611
This item is an authentic replacement part that has been sourced from the original manufacturer to be used with lawnmower engines from Briggs & Stratton and Toro. The metal float bowl fits onto the bo...
  No Longer Available
Key-flywheel – Part Number: 222698S
Key-flywheel
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(1)
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...
$6.40
  In Stock
Order now and your part arrives by Apr 6
Plug-spark – Part Number: 692051
Plug-spark
PartSelect #: PS9074700
Manufacturer #: 692051
This item has been OEM sourced to ensure quality. The spark plug is intended to be used with outboard motors and lawnmower engines from Briggs & Stratton. The spark plug threads into the cylinder and ...
$7.17
  In Stock
Order now and your part arrives by Apr 6
Seal-oil – Part Number: 299819S
Seal-oil
PartSelect #: PS8948679
Manufacturer #: 299819S
This OEM Oil Seal is an individually sold rubber part which is attached around the axis shaft on the crankcase housing to provide a proper seal. A broken seal will lead to a leak, and the part should ...
$7.47
  In Stock
Order now and your part arrives by Apr 6
Float-carburetor – Part Number: 398187
Float-carburetor
PartSelect #: PS8961149
Manufacturer #: 398187
This is a genuine OEM supplied replacement part designed for use with Briggs and Stratton engines. This float controls fuel flow into the carburetor bowl by adjusting the needle valve. Includes a plas...
$13.06
  On Order
Rope-starter – Part Number: 697316
Rope-starter
PartSelect #: PS9077634
Manufacturer #: 697316
This manufacturer approved replacement part is a genuine starter rope. It is specially designed for use with small engines installed on lawn and garden equipment. This rope allow user to to crank star...
$7.85
  In Stock
Order now and your part arrives by Apr 6
Washer-sealing – Part Number: 271716
Washer-sealing
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(1)
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...
$6.40
  In Stock
Order now and your part arrives by Apr 6
Hose-vacuum – Part Number: 791766
Hose-vacuum
PartSelect #: PS9306672
Manufacturer #: 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 p...
$10.60
  In Stock
Order now and your part arrives by Apr 6
Engine Spark Plug Boot – Part Number: 66538S
Engine Spark Plug Boot
PartSelect #: PS9055852
Manufacturer #: 66538S
$6.40
  In Stock
Order now and your part arrives by Apr 6
Gasket-air Cleaner – Part Number: 691894
Gasket-air Cleaner
PartSelect #: PS9065589
Manufacturer #: 691894
This item is a genuine OEM sourced replacement part that is intended to be used with lawnmower engines from Briggs & Stratton and Toro. The gasket is used to seal the connection between the air cleane...
$6.40
  In Stock
Order now and your part arrives by Apr 6

Common Symptoms of models starting with 121Q07

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Will Not Start
Fixed by
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Fixing
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
Bought Troy Built pressure Washer at garage Sale for $30.00 leaked fuel
I have a solid understanding of small engines. This pressure washer was used twice in 2013, when purchased. Sat in a garage for a couple of years with gas in tank and carburetor. Owner was moving and after 7 years of moving it around he sold it at a garage sale.
I took it home and took off gas tank and thoroughly cleaned it. Then went through the carburetor and let soak in cleaner. Cleaned up the spark plug, tested and has good spark. reinstalled carburetor but would not start. I knew I had gas issues. I ordered a carburetor kit and replace the needle valve and seals. Still would not start. Ordered a new carburetor and spark plug. Installed both. Two pulls and it runs like new. Advice: don't try to clean out old carburetor, just buy a new one and install.
Parts Used:
Kit-carb Overhaul
  • Laird from North Las Vegas, NV
  • Difficulty Level:
    Difficult
  • Total Repair Time:
    More than 2 hours
  • Tools:
    Nutdriver, Pliers, Screw drivers, Socket set
2 of 3 people found this instruction helpful.
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The exhaust system just fell off the motor
I ordered the parts as there were only three screws and two bolts that needed to come out and then thenew ones go back in. Everything went just as planned...….well except the two bolts that where included by Briggs and Stratton appear to be 1/8-1/4" too short and now both of the threaded holes in the engine are now stripped and the quick easy repair is now a bust and not repairable by me.

This has nothing to do with PartSelect.com as they just shipped the Briggs and Stratton part box.
Parts Used:
Muffler
  • Darrel from SARASOTA, FL
  • Difficulty Level:
    Very Difficult
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Nutdriver, Screw drivers
1 person found this instruction helpful.
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Screw in new dipstick, check oil level
Very well
Parts Used:
Dipstick
  • Kim from KENNER, LA
  • Difficulty Level:
    Very Easy
  • Total Repair Time:
    Less than 15 mins
4 of 13 people found this instruction helpful.
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