12L Briggs and Stratton Engine - Overview

Models starting with 12L

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Puller-flywheel – Part Number: 19203
$33.95
Special Order
Puller-flywheel
Part #19203
This flywheel puller is designed for servicing larger small engines by safely removing tightly seated flywheels without stressing the crankshaft or damaging ignition components. Constructed from heavy-duty steel and engineered to apply even pulling force, it makes accessing the magneto, crankshaft key, or ignition system straightforward during repairs or overhauls. Built to OEM specifications for durability and precise fit, it’s a reliable tool for maintaining lawn mowers, generators, and pressure washers with compatible engines.
18oz 30w 4 Cycle Oil – Part Number: 100005
$8.95
In Stock
18oz 30w 4 Cycle Oil
Part #100005
This bottle of oil can be used in over 150 different types of machinery. It is most commonly used for pressure washers and generators from manufacturers such as Briggs and Stratton and Troy-Bilt. This detergent oil is warranty approved and specially compounded for warm weather use. Please note: it is important to avoid over filling your engine with oil.
Kit-needle/seat – Part Number: 398188
$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.
Rope-starter – Part Number: 280399S
$10.95
Special Order
Rope-starter
Part #280399S
This durable nylon starter rope is an authentic OEM supplied replacement part that is specially produced for use with Briggs and Stratton engines that are commonly installed on Toro lawn and garden equipment. When the rope is pulled to start the engine, it is returned back into the starter pulley by means of the starter spring. One starter rope is included per order, please note the handle grip and other parts are all sold separately.
Screw – Part Number: 691664
$7.95
Special Order
Screw
Part #691664
Filter-A/C Foam – Part Number: 696263
$22.95
Special Order
Filter-A/C Foam
Part #696263
Jet-Main – Part Number: 498976
$34.95
Special Order
Jet-Main
Part #498976
Engine Recoil Starter Assembly – Part Number: 497680
$88.95
Special Order
Engine Recoil Starter Assembly
Part #497680
This authentic OEM starter assembly is designed for use with lawn and garden engines and is sourced directly from the original manufacturer to ensure quality and compatibility. The assembly includes a durable plastic shroud/housing, starter pulley, recoil spring, pull rope with grip, and the necessary hardware for installation. It functions as the primary mechanism for manually cranking and starting the engine. To complete the replacement, you’ll need a wrench. Simply remove the four screws and nuts securing the old starter assembly, then install the new one using the included hardware. This item is sold as a complete individual assembly.
Cable-Starter – Part Number: 690795
$33.95
Special Order
Cable-Starter
Part #690795
Head-cylinder – Part Number: 590411
$82.95
Special Order
Head-cylinder
Part #590411
Filter-a/c Foam – Part Number: 493537S
$11.95
Special Order
Filter-a/c Foam
Part #493537S
Genuine Manufacturer Sourced replacement part used on a variety of Briggs and Stratton Engines. This filter adds a second layer of protection against airborne-dirt particle ingestion. This is a Foam Pre-Cleaner which is Sold Individually. Please note a Paper Filter and a Cover are both Sold Separately.
Shaft-Throttle – Part Number: 493267
$30.95
Special Order
Shaft-Throttle
Part #493267

Common Symptoms of models starting with 12L

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Mower was submerged in Hurricane Matthew
25 of 51 people found this instruction helpful.
  • Morris from HOPE MILLS, NC
  • A Bit Difficult
  • More than 2 hours
  • Wrench set
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.
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starter rewind cord broke
15 of 22 people found this instruction helpful.
  • Seikai from MARICOPA, CA
  • A Bit Difficult
  • 1- 2 hours
  • Nutdriver, Pliers, Screw drivers, Socket set, Wrench (Adjustable), Wrench set
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.
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Smelled Gas Leaks
8 of 11 people found this instruction helpful.
  • Jonathan from LIBERTY TWP, OH
  • Easy
  • 30 - 60 mins
  • Pliers, Screw drivers, Socket set
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 with all the necessary clamps.
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