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SECTION 1:  IMPORTANT SAFE OPERATION PRACTICES

General Operation

1.

Read this operator’s manual carefully in its entirety 
before attempting to assemble this machine. Read, 
understand, and follow all instructions on the 
machine and in the manual(s) before operation. Be 
completely familiar with the controls and the proper 
use of this machine before operating it. Keep this 
manual in a safe place for future and regular 
reference and for ordering replacement parts.

2.

This machine is a precision piece of power 
equipment, not a plaything. Therefore, exercise 
extreme caution at all times. Your unit has been 
designed to perform one job: to mow grass. Do not 
use it for any other purpose.

3.

Never allow children under 14 years old to operate 
this machine. Children 14 years old and over 
should read and understand the operation 
instructions and safety rules in this manual and 
should be trained and supervised by a parent. Only 
responsible individuals who are familiar with these 
safe operation rules should use this machine.

4.

Thoroughly inspect the area where the equipment 
is to be used. Remove all stones, sticks, wire, 
bones, toys and other foreign objects which could 
be tripped over or picked up and thrown by the 
blade. Thrown objects can cause serious personal 
injury. Plan your mowing pattern to avoid discharge 
of material toward roads, sidewalks, bystanders 
and the like. Also, avoid discharging material 
against a wall or obstruction which may cause 
discharged material to ricochet toward operator. 

5.

To help avoid blade contact or a thrown object 
injury, stay in the operator zone behind the handles 
and keep bystanders, helpers, children and pets at 
least 75 feet from the machine while it is in 
operation. Stop machine if anyone enters the area.

6.

Always wear safety glasses or safety goggles 
during operation and while performing an 
adjustment or repair to protect your eyes. Thrown 

objects which ricochet can cause serious injury to 
the eyes.

7.

Wear sturdy, rough-soled work shoes and close-
fitting slacks and shirts. Shirts and pants that cover 
the arms and legs and steel-toed shoes are 
recommended. Never operate this machine in bare 
feet, sandals, slippery or light weight (e.g. canvas) 
shoes.

8.

Do not put hands or feet near rotating parts or 
under the cutting deck. Contact with the blade can 
amputate hands and feet.

9.

A missing or damaged discharge cover can cause 
blade contact or thrown object injuries.

10. Many injuries occur as a result of the mower being 

pulled over the foot during a fall caused by slipping 
or tripping. Do not hold on to the mower if you are 
falling; release the handle immediately. 

11. Never pull the mower back toward you while you 

are walking. If you must back the mower away from 
a wall or obstruction first look down and behind to 
avoid tripping and then follow these steps:

a. Step back from the mower to fully extend 

your arms.

b. Be sure you are well balanced with sure 

footing.

c.

Pull the mower back slowly, no more than 
half way toward you.

d. Repeat these steps as needed.

5.

Do not operate the mower while under the influence 
of alcohol or drugs.

6.

Do not engage the self-propelled mechanism on 
units so equipped while starting engine.

7.

The blade control handle is a safety device. Never 
attempt to bypass its operation. Doing so makes 
the safety device inoperative and may result in 
personal injury through contact with the rotating 
blade. The blade control handle must operate 
easily in both directions and automatically return to 
the disengaged position when released.

WARNING: 

This symbol points out important safety instructions which, if not followed, could endanger 

the personal safety and/or property of yourself and others. Read and follow all instructions in this manual 
before attempting to operate this machine. Failure to comply with these instructions may result in personal 
injury. When you see this symbol—HEED ITS WARNING

WARNING: 

This machine was built to be operated according to the rules for safe operation in this 

manual. As with any type of power equipment, carelessness or error on the part of the operator can result in 
serious injury. This machine is capable of amputating hands and feet and throwing objects. Failure to 
observe the following safety instructions could result in serious injury or death.

WARNING: 

Engine exhaust, some of its constituents, and certain vehicle components contain or 

emit chemicals known to State of California to cause cancer and birth defects or other 
reproductive harm.

Summary of Contents for 437

Page 1: ...eting applicable local or state laws if any If a spark arrester is used it should be maintained in effective working order by the operator In the State of California the above is required by law Secti...

Page 2: ...plained below For future reference please copy the model number and the serial number of the equipment in the space below ENGINE INFORMATION The engine manufacturer is responsible for all engine relat...

Page 3: ...ne in bare feet sandals slippery or light weight e g canvas shoes 8 Do not put hands or feet near rotating parts or under the cutting deck Contact with the blade can amputate hands and feet 9 A missin...

Page 4: ...d fall can cause serious personal injury If you feel you are losing your balance release the blade control handle immediately and the blade will stop rotating within 3 seconds Do Not 1 Do not mow near...

Page 5: ...equipment manufacture s O E M blade only listed in this manual Use of parts which do not meet the original equipment specifications may lead to improper performance and compromise safety 4 Mower blade...

Page 6: ...LY Do not mow on inclines with a slope in excess of 15 degrees a rise of approximately 2 1 2 feet every 10 feet A riding mower could overturn and cause serious injury If operating a walk behind mower...

Page 7: ...laced on top of the unit Remove it from the unit and set it out of the way See Figure 2 Figure 2 Raise the lower handle as shown in Figure 2 until it snaps into place Raise the upper handle as shown i...

Page 8: ...before shipping proceed to the next section If it is unassembled follow the steps below Insert frame into grass bag with the black plastic side on the bottom of bag See Figure 7 Figure 7 Slip the side...

Page 9: ...e the illustrations in Figure 11 with your lawn mower to familiarize yourself with the location of various controls and adjustments Figure 11 Blade Control Handle The blade control handle is located o...

Page 10: ...l cap on the end of the spark plug wire is fastened securely over the metal tip on the spark plug Starting Engine Push the primer three times Wait two seconds between each push In temperatures below 5...

Page 11: ...ect in the bag as you run mower Operate mower till the grass bag is full Stop the engine completely by releasing the control handle Make sure that the unit has come to a complete stop Lift discharge d...

Page 12: ...e a season or every 50 hours of operation Inspect muffler periodically and replace if necessary Damaged mufflers or spark arresters can create a fire hazard IMPORTANT Make sure to avoid muffler and su...

Page 13: ...screwdriver See Figure 14 Remove metal from the heavy side until it balances evenly It is recommended that the blade always be removed from the adapter for the best test of balance Figure 14 Before re...

Page 14: ...clips in the inner holes of the weld pins and replace the carriage bolts and wing nuts on the handle brackets Attach the starter rope as instructed in the Assembling Your Lawn Mower section Adjusting...

Page 15: ...e Cause Corrective Action Engine fails to start 1 Blade control handle disengaged 2 Spark plug wire disconnected 3 Fuel tank empty or stale fuel 4 Blocked fuel line 5 Faulty spark plug 6 Engine floode...

Page 16: ...ARTS LIST FOR MODEL 437 1 6 10 3 2 11 4 5 4 19 35 33 32 29 30 51 41 40 46 24 22 21 20 25 42 44 44 12 31 31 30 29 28 26 27 44 44 49 43 18 36 38 45 48 34 14 13 37 39 25 52 47 16 23 7 8 9 12 15 55 54 53...

Page 17: ...ont Spring Lever 29 738 0507B Shld Bolt 5 Dia x 357 30 736 0105 Bell Washer 38 I D x 88 O D 31 738 0102 Front Axle Bolt 32 720 0426 Spring Lever Knob 33 732 0417A Rear Spring Lever 34 14578 Height Adj...

Page 18: ...such as lubricants filters blade sharpening tune ups brake adjustments clutch adjustments deck adjustments and normal deterioration of the exterior finish due to use or exposure d MTD LLC does not ext...

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