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2721H Simplicity Lawn Mower - Overview

Diagrams for 2721H

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Filter- A/C Cartridge – Part Number: 491588S
$8.98
In Stock
Filter- A/C Cartridge
★★★★★
★★★★★
(4)
Part #491588S
This is a replacement air filter/AC cartridge for your small engine. The air filter prevents dirt and debris from entering the engine. Over time, the air filter can become clogged or damaged, and this can lead to reduced performance. This air filter is approximately 4 inches wide and approximately 5 inches long. To replace the air filter, locate the air filter cover on the side of the engine, unscrew it, and remove the old filter. Be sure to clear out any dirt, clippings, or other debris that has found its way into the air filter assembly before you insert the new filter. Reattach the air filter cover, and secure it with the screws. This product is sold individually.
Starter Pawl-Ratchet – Part Number: 281505S
$6.40
In Stock
Starter Pawl-Ratchet
Part #281505S
The manufacturer-approved Ratchet Pawl (Starter Pawl) comes in a set of two (2). This part attaches inside the recoil assembly, and is used to engage the flywheel. if broken due to wear/damage it will have a hard time engaging the fly wheel, making the engine harder to start, and should be replaced. Installation is rated as "Easy" by customers, and will require a screwdriver, pliers and nutdriver. Refer to your make, model and diagram to ensure this is the correct part for you.This model is plastic and comes in white.
Engine Oil Seal – Part Number: 795387
$9.69
In Stock
Engine Oil Seal
★★★★★
★★★★★
(2)
Part #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 as Medium. This part provides a seal around the crank shaft and engine block. When installing onto the engine block around the crank shaft, use something that makes contact around the entire seal, like a large socket or pipe, and tap into place evenly, ensuring that the housing is clean and dry. If the part is broken, likely due to fatigue, there will be leaking oil, and this part should be replaced using the model number on the original part to confirm it is the right fit for your model.
Kit-needle/seat – Part Number: 398188
$8.91
In Stock
Kit-needle/seat
★★★★★
★★★★★
(1)
Part #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 and seat work together to make sure that the valve opens and closes properly, so that it does not leak or overflow. If it is broken, you may notice a strong odor of fuel coming from your machine. Your engine may also run poorly or not start at all. A damaged or corroded float valve can cause fuel leaks, which can be dangerous as they are flammable. To remove the float valve, first disconnect the spark plug wire on your machine. You then need to consult your user manual to locate the float bowl of your machine and remove the bolts or screws securing their cover in place. When you lift off the cover, you will find the needle attached to the float. Using a pair of needle-nose pliers, grasp onto the needle and pull it out of the float. Keep in mind when you are purchasing this OEM-manufactured kit that it comes with the needle and seat together, but the float itself is not included.
Pulley/spring Assembly – Part Number: 498144
$25.54
In Stock
Pulley/spring Assembly
★★★★★
★★★★★
(2)
Part #498144
This manufacturer approved recoil starter pulley is designed for lawn and garden equipment engines. The recoil starter engages the drive cup on the flywheel to start the engine when pulled. This assembly includes: Plastic Pulley and a Metal Recoil Spring.
Engine Oil Seal – Part Number: 391086S
$8.09
In Stock
Engine Oil Seal
★★★★★
★★★★★
(1)
Part #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 "Medium" difficulty and requires a screw driver, wrench set and seal puller. A broken seal will cause a leak, and the part must be replaced. Refer to your make, model and diagram to ensure you're choosing the right part. This part comes in black and gray.
Connector-hose – Part Number: 692317
$9.08
In Stock
Connector-hose
★★★★★
★★★★★
(1)
Part #692317
This is a Genuine Manufacturer Sourced replacement part used on a a variety of Engines. This is a Fuel Line Connector connects the fuel line to the carburetor. This part is made out of Plastic and Metal, it is Sold Individually.
Engine Cylinder Head Gasket – Part Number: 693997
$30.09
In Stock
Engine Cylinder Head Gasket
Part #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 the seal allows combustion to occur, making your engine run at peak performance. If the gasket is damaged or coming apart, you may notice a decrease in the power and performance of your engine. When you remove the old gasket, be sure that the surface you are attaching the new one to is completely clean, so the seal will be effective. This part is sold individually and it is a genuine OEM part.
Gasket-float Bowl – Part Number: 693981
$6.40
In Stock
Gasket-float Bowl
Part #693981
This is a Genuine OEM Authorized Gasket used on variety of Lawn and Garden Equipment Engines. This part is made out of Rubber and it is sold individually. If the carburetor is leaking fuel it is recommended to replace the Bowl Gasket. Gaskets and O-rings are a common source of problems. They eventually shrink, causing fuel and air leaks that lead to poor engine performance. When replacing this Gasket you would need a Screwdriver and a set of Wrenches.
Engine Oil Filter – Part Number: 696854
$17.25
In Stock
Engine Oil Filter
Part #696854
This genuine OEM oil filter helps to remove harmful contaminants from engine oil. It is designed for a variety of Engines. It is sold Individually. This part maintains optimum performance of your engine in accordance with applicable EPA emissions regulations. It is recommended to replace an Oil Filter at least once a season.
Filter-a/c Foam – Part Number: 493537S
$8.48
In Stock
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.
Bearing, Ball 11/16x1 – Part Number: 1705897SM
$10.65
In Stock
Bearing, Ball 11/16x1
Part #1705897SM
This ball bearing is sourced from the original equipment manufacturer and can be used in a variety of outdoor equipment. It has an inner diameter of 11/16 inches. The ball bearing provides support for the rotating parts in your equipment and reduces the amount of friction they are subject to during use. If the bearing is not adequately lubricated or has worn down, you may hear grinding or squeaking from your equipment and notice excessive vibration when in use. It is important to address this issue promptly as a faulty ball bearing can potentially damage the parts located near it. To replace the ball bearing, use a pry bar or bearing puller to pry it out of its housing. Clean the housing thoroughly and press your new ball bearing in position. Note that when pressing the ball bearing into place, apply force only to the outer portion of the bearing.

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Engine Brace – Part Number: 2721H
No Longer Available
Engine Brace
This part number matches the current model number 2721H
Part #2721H

Common Symptoms of the 2721H

How this model fails, and the parts that fix it.

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Engine quit due to valve guide sliding out causing rocker arm to be immovable resulting in bent push rods.
21 of 24 people found this instruction helpful.
  • D from HUNTSVILLE, AL
  • Really Easy
  • 30 - 60 mins
  • Nutdriver, Socket set
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.
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Mistreated Briggs & Stratton 206 CC Engine on MTD Chipper
11 of 15 people found this instruction helpful.
  • Dana from HAMMOND, IN
  • A Bit Difficult
  • 1- 2 hours
  • Nutdriver, Pliers, Screw drivers, Socket set
Removed tank and drained old gas.
Removed and disassembled carb. Needed new gaskets and seals, and had to clean corn syrup glaze (separated ethanol) from bowl and everywhere else with carb cleaner.
Throttle linkage was de-plating/rusty. Steel wool and WD40 got it moving again.
Cleaned spark plug electrode.
Reassemble d, poured Sea Foam in the bottom of the tank and gave it a few pulls.
Let Sea Foam sit for a while, then filled the tank with Premium.
Blew white smoke for a minute then ran like new. Shredded for a while, then changed the oil.
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Lost my main jets while cleaning old gas from carb.
11 of 16 people found this instruction helpful.
  • dan from EASTPORT, ME
  • Really Easy
  • 15 - 30 mins
  • Pliers, Screw drivers, Socket set, Wrench set
I removed the fan shroud, the carb/manifold as an assembly,turned the carb upside down and removed the fuel bowl. I replaced only one jet. Not until this moment did I discover their were two jets in this nikki carb. I now have a second jet ordered and will install it Friday,hopefully. These jets are two different part numbers as one is a left jet and the other is a right one. Be careful when opening the fuel bowl as these jets are held in their bores by small O-rings, and nothing else. The brigg's and Stratton part numbers are 791501 for the left jet and 791502 for the right.
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