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12178 Briggs and Stratton Engine - Overview
Models starting with 12178
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- 121782-0109-01 Briggs and Stratton Engine (Engine)
- 121782-0123-01 Briggs and Stratton Engine (Engine)
- 121782-0123-02 Briggs and Stratton Engine (Engine)
- 121782-0151-01 Briggs and Stratton Engine (Engine)
- 121782-0174-01 Briggs and Stratton Engine (Engine)
- 121782-0197-01 Briggs and Stratton Engine (Engine)
- 121782-0208-01 Briggs and Stratton Engine (Engine)
- 121782-0213-01 Briggs and Stratton Engine (Engine)
- 121782-0254-01 Briggs and Stratton Engine (Engine)
- 121782-0262-99 Briggs and Stratton Engine (Engine)
- 121782-0273-01 Briggs and Stratton Engine (Engine)
- 121782-3109-01 Briggs and Stratton Engine (Engine)
- 121782-3121-99 Briggs and Stratton Engine (Engine)
- 121782-3133-01 Briggs and Stratton Engine (Engine)
- 121782-3143-01 Briggs and Stratton Engine (Engine)
- 121782-3146-01 Briggs and Stratton Engine (Engine)
- 121782-3154-01 Briggs and Stratton Engine (Engine)
- 121782-7051-01 Briggs and Stratton Engine (Engine)
- 121787-0152-01 Briggs and Stratton Engine (Engine)
- 121787-0170-01 Briggs and Stratton Engine (Engine)
- 121787-0176-01 Briggs and Stratton Engine (Engine)
- 121787-0209-01 Briggs and Stratton Engine (Engine)
- 121787-0269-01 Briggs and Stratton Engine (Engine)
- 121787-0427-99 Briggs and Stratton Engine (Engine)
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$8.95
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Guide-Rope
Part #205912GS
$5.95
In Stock
Key-flywheel
Part #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 Pliers to replace this item.
$30.95
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Shaft-Throttle
Part #493267
$7.95
Special Order
Retainer-Gov Shaft
Part #690340
$5.95
In Stock
Seal-o Ring
Part #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 seal. Many different sizes of O ring are used in these engines; consult manual to be sure of correct placement. Sold individually.
$11.95
In Stock
Kit-needle/seat
Part #398188
Genuine manufacturer approved carburetor needle valve for lawn and garden equipment engines. This item includes the seat. The needle valve opens and closes to control the flow of fuel into the carburetor. Make sure to disconnect the spark plug wire and drain all gasoline from the carburetor and fuel tank before starting a repair.
$15.95
Special Order
Deflector-muffler
Part #393760
This is a genuine Briggs & Stratton and Toro replacement part for use in engines, lawn mowers, and lawn tractors. The muffler deflector is made out of metal. A wrench may be needed during the replacement of this item. It will need to be replaced if it breaks. This item is sold individually.
$27.95
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Deflector-Muffler
Part #396548
$13.95
Special Order
Seal-oil
Part #399781S
This is an authentic replacement part manufactured for use with small engines. Seals can deteriorate overtime, and it is recommended to replace worn seals when servicing an engine. This seal is the lower seal in the engine's sump, the seal is sold individually.
$15.95
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Pin-piston/std
Part #298909
$59.95
Special Order
Switch-interlock
Part #499421
It is a genuine manufacturer-approved part which is specially designed for use with Briggs and Stratton engines commonly installed on lawn and garden equipment. The purpose of the switch-interlock is to act as a safety feature which will shut the engine off. Unfortunately, over time parts will wear out and it may begin to fail eventually ...Read morerequiring a replacement. Refer to the owners manual and the appropriate diagrams of your model for the correct location and installation of this component. Note, this high-quality plastic body switch-interlock is sold individually.
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$5.95
Special Order
Engine Spark Plug Terminal
Part #493880S
This spark plug terminal is supplied directly from the original equipment manufacturer. The metal terminal is designed to fasten the spark plug to the engine lead wire. This component is sold individually, and needle nose pliers are helpful with the repair. Please refer to the appropriate diagrams of your engine model for the proper application of this hardware.
Exact Part matches for your search term
No Longer Available
SVC-GC SEC CKTP HOLD DOWNBRK;27251,E46GC
This part number matches the current model number 12178
Part #DE81-03488A
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Common Symptoms of models starting with 12178
How this model fails, and the parts that fix it.
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replaced gasket that go's between the air cleaner housing and carb. cleaned housing and reinstalled with new air filter
12 of 14 people
found this instruction helpful.
Also replaced fuel tank , the built in fuel shut off started leaking , had to replace the tank. Ordered a new one Briggs & Stratton original equipment fit perfect . This is a 25 year old Briggs & Stratton lawn mower 3.5 HP, Runs perfect, starts by the 2nd crank every time. First time I ever had to spend money on it since I bought it new i
... Read more
n 1991
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Smelled Gas Leaks
8 of 11 people
found this instruction helpful.
Inspected/removed fuel lines and found signs of leak. Removed and inspected carburetor and found that seals and gaskets were toast. Replaced said seals with ones from the kit that fit and replaced fuel lines.
Would be nice to have a fuel line kit with the big fuel line (tank to carb) and the little one (carb to engine) together ... Read more with all the necessary clamps.
Would be nice to have a fuel line kit with the big fuel line (tank to carb) and the little one (carb to engine) together ... Read more with all the necessary clamps.
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