MTD Yard-Man 2800M - User Manual

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Item Part No. Description

1 791-182059 Air Cleaner/Muffler Cover Assembly

(includes 2 & 37)

2 791-180350B Air Cleaner Filter

3 791-180351 Carburetor Mounting Screw Assembly

4 791-180226 Wavey Washer

5 791-182160 Choke Lever Assembly (includes 6)

6 791-182161 Choke Knob and Screw

7 791-182162 Choke Lever and Plate (includes 5)

8 791-182875 Carburetor Assembly (includes 9)

9 791-610675 Carburetor Gasket

10 791-181860 Carb Mount Screw

11 791-683974B Primer and Hose Assembly

12 791-182063 Carb Mount Assembly (includes 10 & 15)

13 791-684451 Reed Assembly

14 791-181866 Power Shaft Assembly

15 791-612115 Crank Case Gasket

16 791-181865 Crank Case Service Assembly

(includes 10, 14 & 24)

17 791-612134 Rear Mounting Pad

18 791-181152 Fuel Tank Assembly (includes 19-21)

19 791-182612 Fuel Cap Assembly

20 791-181168 Fuel Return Line

21 791-683398 Fuel Line Assembly

22 791-145308 Front Mounting Pad

23 791-153520 Shroud Assembly (includes 24)

24 791-181861 Shroud Screw

25 791-182064 Shroud Extension and Stand (includes 37)

26 791-181867 Flywheel Assembly

27 791-610303 Square Nut Drive

28 753-04232 Recoil Pulley Assembly

29 791-613102 Recoil Spring

30 791-611061 Rope Guide

Item Part No. Description

31 791-181889 Pulley Retainer Assembly

32 791-182827 Switch Assembly (includes 39)

33 791-181079 Pull Handle

34 791-613103 Rope

35 791-182828 Starter Housing Assembly (includes 28-34 & 39)

36 791-181862 Housing Screw

37 791-181345 Cover Screw

38 791-153597 Upper Clamp Assembly

39 791-180036 Wire Lead

40 753-04125 Module Assembly

41 791-610311B Spark Plug

42 791-182066 Muffler Assembly (includes 43-45)

43 791-182747 Spark Arrestor

44 791-182065 Exhaust Gasket

45 791-147575 Muffler Mounting Bolt Assembly

46 753-1206 Cylinder Assembly (includes 48 & 49)

47 753-1207 Piston and Rod Assembly

48 791-610674 Cylinder Gasket

49 791-182723 Cylinder Bolt

* 791-182067 Engine Gasket Kit

* 791-180090 O.E.M. Carburetor Repair Kit

* 791-180091 Gasket Diaphragm Repair Kit

* 753-1209 Piston Ring

* 753-04173 Short Block Assembly

(includes 10, 14, 16, 24, 41, 46-49)

* 791-181501 Starter Housing Screw Set

* Not Shown

ENGINE PARTS - MODEL 2800m

2-CYCLE GAS TRIMMER

PPN 41AD280G000

Issued 10/98

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Summary

Engine Parts

Air Cleaner and Carburetor Components

Assembly and components for air intake, fuel, and carburetor.

Fuel Tank and Lines

Components for fuel storage, delivery, and cap.

Recoil Starter and Housing

Parts for the recoil starter mechanism and housing.

Cylinder and Piston Assembly

Core engine components including cylinder, piston, and gasket.

Boom and Trimmer Parts

Throttle Control System

Assembly for throttle housing, trigger, and cable.

D-Handle and Clamp Assembly

Components for the D-handle and lower clamp.

Drive Shaft and Housing

Assembly for the flexible drive shaft and its housing.

Cutting Head Assembly

Components for the trimmer head, including spool and blade.

Summary

Engine Parts

Air Cleaner and Carburetor Components

Assembly and components for air intake, fuel, and carburetor.

Fuel Tank and Lines

Components for fuel storage, delivery, and cap.

Recoil Starter and Housing

Parts for the recoil starter mechanism and housing.

Cylinder and Piston Assembly

Core engine components including cylinder, piston, and gasket.

Boom and Trimmer Parts

Throttle Control System

Assembly for throttle housing, trigger, and cable.

D-Handle and Clamp Assembly

Components for the D-handle and lower clamp.

Drive Shaft and Housing

Assembly for the flexible drive shaft and its housing.

Cutting Head Assembly

Components for the trimmer head, including spool and blade.

This document provides an exploded view and parts list for a Model 2800m 2-Cycle Gas Trimmer, identified by PPN 41AD280G000. The trimmer is designed for cutting grass and weeds, featuring a gas-powered engine and a bump-feed line head.

Engine and Fuel System

The engine is a 2-cycle gas engine, indicating it requires a fuel-oil mixture for operation. Key components of the engine system include:

Air Cleaner/Muffler Cover Assembly (791-182059): This assembly, which includes the Air Cleaner Filter (791-180350B) and Cover Screw (791-181345), protects the engine from debris and reduces noise. Regular cleaning or replacement of the air filter is crucial for engine performance.
Carburetor Assembly (791-182875): This component mixes air and fuel for combustion. It includes a Carburetor Gasket (791-610675) and is mounted with a Carb Mount Screw (791-181860) and Carb Mount Assembly (791-182063). A Carburetor Repair Kit (791-180090) and Gasket Diaphragm Repair Kit (791-180091) are available for maintenance.
Choke Lever Assembly (791-182160): This assembly, including the Choke Knob and Screw (791-182161) and Choke Lever and Plate (791-182162), is used to enrich the fuel mixture for easier cold starting.
Primer and Hose Assembly (791-683974B): This system primes the carburetor with fuel, aiding in starting the engine.
Fuel Tank Assembly (791-181152): This includes the Fuel Cap Assembly (791-182612), Fuel Return Line (791-181168), and Fuel Line Assembly (791-683398). The fuel tank stores the gas-oil mixture.
Muffler Assembly (791-182066): This component, including the Spark Arrestor (791-182747) and Exhaust Gasket (791-182065), reduces engine noise and directs exhaust gases away from the user. The Spark Arrestor should be regularly inspected and cleaned to prevent carbon buildup, which can restrict exhaust flow and reduce engine power.
Spark Plug (791-610311B): This ignites the fuel-air mixture in the combustion chamber. Regular inspection and replacement are part of routine maintenance.
Cylinder Assembly (753-1206): This includes the Piston and Rod Assembly (753-1207), Cylinder Gasket (791-610674), and Cylinder Bolt (791-182723). The Piston Ring (753-1209) is also a critical component of the cylinder. An Engine Gasket Kit (791-182067) is available for comprehensive engine sealing during repairs.
Short Block Assembly (753-04173): This assembly includes core engine components such as the crankcase, piston, and cylinder, offering a more complete replacement option for major engine issues.

Starting System

The trimmer features a recoil starting system:

Starter Housing Assembly (791-182828): This houses the recoil mechanism and includes the Recoil Pulley Assembly (753-04232), Recoil Spring (791-613102), Rope (791-613103), and Rope Guide (791-611061).
Pull Handle (791-181079): This is the user interface for engaging the recoil starter.
Pulley Retainer Assembly (791-181889): Secures the recoil pulley.
Flywheel Assembly (791-181867): This component provides inertia for smooth engine operation and typically incorporates magnets for the ignition system.

Control and Handling

The trimmer is designed for user comfort and control:

Throttle Housing and Trigger Assembly (791-182093): This assembly, including the Throttle Trigger Spring (791-610314) and Throttle Trigger (791-180975), allows the user to control engine speed.
Throttle Cable Assembly (791-182068): Connects the throttle trigger to the carburetor.
D-Handle Assembly (791-153064): Provides an ergonomic grip for the user, including D-Handle Hardware (791-153317).
Switch Assembly (791-182827): Includes a Wire Lead (791-180036) and is used to turn the engine on and off.
Shroud Assembly (791-153520): This protective cover, including Shroud Screw (791-181861), protects the engine and user from moving parts and debris.
Shroud Extension and Stand (791-182064): Provides additional protection and a stable base when the trimmer is not in use.
Shoulder Strap Assembly (791-682075B): An optional accessory for improved comfort during extended use, distributing the trimmer's weight.

Trimmer Head and Drive System

The cutting mechanism of the trimmer consists of:

Drive Shaft Housing Assembly (791-181893): Encloses the flexible drive shaft.
Flexible Drive Shaft (753-04280): Transmits power from the engine to the trimmer head.
Bushing Housing Assembly with Spool Shaft (791-181784): Supports the spool shaft and allows for smooth rotation.
Shield and Blade Assembly (791-683274): This includes the Blade Assembly (791-180553) and protects the user from flying debris while also featuring a line-cutting blade to maintain optimal line length.
Outer Spool and Eyelet Assembly (791-153619): Holds the trimmer line and allows it to feed out.
Retainer (791-610660), Spring (791-610317B), and Inner Reel (791-610318): Components of the bump feed mechanism.
Bump Head Knob Assembly (791-153066B): The part of the trimmer head that the user taps on the ground to advance the line.
Replacement Line, 0.80 Diameter (791-610375): The cutting filament.
Reel and Line Assembly (791-153577B): A pre-wound spool of trimmer line.
Bump Head Assembly (791-180897B): A complete replacement for the trimmer head.

Maintenance Features

The parts list highlights several components designed for maintenance and repair:

Engine Gasket Kit (791-182067): For sealing engine components during overhaul.
O.E.M. Carburetor Repair Kit (791-180090) and Gasket Diaphragm Repair Kit (791-180091): For servicing the carburetor.
Piston Ring (753-1209): A wear item that may need replacement to maintain engine compression.
Starter Housing Screw Set (791-181501): For reassembling the starter housing.
Anti-Rotation Screw (791-145569): Likely prevents rotation of certain components.

Regular maintenance, including cleaning the air filter, spark arrestor, and replacing the spark plug and trimmer line as needed, will ensure optimal performance and longevity of the Model 2800m 2-Cycle Gas Trimmer.