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7.

Extinguish all cigarettes, cigars, pipes and other 
sources of ignition.

8.

Never fuel machine indoors because flammable 
vapors will accumulate in the area.

9.

Never remove gas cap or add fuel while the engine 
is hot or running. Allow engine to cool at least two 
minutes before refueling.

10. Never over fill fuel tank. Fill tank to no more than ½ 

inch below bottom of filler neck to provide space for 
fuel expansion.

11. Replace gasoline cap and tighten securely.
12. If gasoline is spilled, wipe it off the engine and 

equipment. Move unit to another area. Wait 5 
minutes before starting the engine.

13. Never store the machine or fuel container inside 

where there is an open flame, spark or pilot light as 
on a water heater, space heater, furnace, clothes 
dryer or other gas appliances. 

14. To reduce fire hazard, keep mower free of grass, 

leaves, or other debris build-up. Clean up oil or fuel 
spillage and remove any fuel soaked debris. 

15. Allow a mower to cool at least 5 minutes before 

storing.

General Service

1.

Never run an engine indoors or in a poorly 
ventilated area. Engine exhaust contains carbon 
monoxide, an odorless and deadly gas.

2.

Before cleaning, repairing, or inspecting, make 
certain the blade and all moving parts have 
stopped. Disconnect the spark plug wire and 
ground against the engine to prevent unintended 
starting. 

3.

Check the blade and engine mounting bolts at 
frequent intervals for proper tightness. Also, 
visually inspect blade for damage (e.g., bent, 
cracked, worn) Replace blade with the original 
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 blades are sharp and can cut. Wrap the 
blade or wear gloves, and use extra caution when 
servicing them.

5.

Keep all nuts, bolts, and screws tight to be sure the 
equipment is in safe working condition.

6.

Never tamper with safety devices. Check their 
proper operation regularly.

7.

After striking a foreign object, stop the engine, 
disconnect the spark plug wire and ground against 
the engine. Thoroughly inspect the mower for any 
damage. Repair the damage before starting and 
operating the mower.

8.

Never attempt to make a wheel or cutting height 
adjustment while the engine is running.

9.

Grass catcher components, discharge cover, and 
trail shield are subject to wear and damage which 
could expose moving parts or allow objects to be 
thrown. For safety protection, frequently check 
components and replace immediately with original 
equipment manufacturer’s (O.E.M.) parts only, 
listed in this manual. “Use of parts which do not 
meet the original equipment specifications may 
lead to improper performance and compromise 
safety!”

10. Do not change the engine governor setting or 

overspeed the engine. The governor controls the 
maximum safe operating speed of the engine. 

11. Maintain or replace safety and instruction labels, as 

necessary.

12. Observe proper disposal laws and regulations. 

Improper disposal of fluids and materials can harm 
the environment. 

Your Responsibility

Restrict the use of this power machine to persons 
who read, understand and follow the warnings and 
instructions in this manual and on the machine.

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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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