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11

Operating Your Lawn Mower 

Once the engine has started, squeeze the blade 
control handle against the upper handle to run the 
lawn mower. 

Do not operate the mower without the mulching 
cover, the grass catcher bag, or the discharge 
chute properly installed.

Be sure that the lawn is clear of stones, sticks, wire, 
or other objects which could damage lawn mower 
or engine. Such objects could be accidently thrown 
by the mower in any direction and cause serious 
personal injury to the operator and others.

For best resultsdo not cut wet grass because it 
tends to stick to the underside of the mower, 
preventing proper discharge of grass clippings, 
poor mulching conditions, and could cause you to 
slip and fall. New grass, thick grass, or wet grass 
may require a narrower cut.

For a healthy lawn, always cut off one-third or less 
of the total length of the grass. Lawn should be 
trimmed in fall as long as there is growth.

Bagging Grass Clippings

You can use the grass catcher bag to collect clippings 
while you are operating the mower. 

Attach the grass catcher following instructions on 
page 8 of this manual. Grass clippings will 
automatically collect 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 door and pull grass bag up and away 
from the mower to dispose of the grass clippings.

Using the Mulcher

For effective mulching, do not cut wet grass 
because it tends to stick to the underside of the 
deck, preventing proper mulching of grass 
clippings. New or thick grass may require a 
narrower cut. The ground speed should be 
adjusted to the condition of the lawn. If mowing has 
been delayed and the grass has been allowed to 
grow in excess of 4", mulching is not 
recommended. Mow using the grass bag (if so 
equipped) to reduce the grass height to 3-1/4" 
maximum before mulching.

Adjusting Cutting Height

Refer to height adjustments section of this manual on 
page 14 for instruction on how to adjust the cutting 
height and the handle height. 

For best results in mowing, keep the cutting height 
position high until you have determined which 
cutting height is preferred. 

WARNING: 

If you strike a foreign object, 

stop the engine. Remove spark plug wire from 
spark plug, thoroughly inspect the mower for 
any damage. Repair the damage before 
restarting and operating the mower. Extensive 
vibration of the mower during operation is an 
indication of damage. 

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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