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14

Replacing Rear Flap 

To remove rear flap, cut off the flat end of the wire 
rod which secures it to the deck. See Figure 15 . 

Attach the new flap and new rod to deck, bending 
the ends of the new rod over to secure to deck.

Figure 15

SECTION 8:  MAKING ADJUSTMENTS

Adjusting Handle Height

Your mower is shipped with the handle in the higher 
height position. To lower height, proceed as follows.

Remove the starter rope from the rope guide.

Remove the upper handle by removing the hand 
knobs and carriage bolts. Lay upper handle out of 
the way, being careful not to bend or kink cables.

Remove the hairpin clips from the weld pins on the 
handle brackets. Refer to Figure 4 . 

Remove the carriage bolts and wing nuts from the 
handle brackets. Press out on the legs of the lower 
handle. Remove lower handle from the mower.

Turn the lower handle 
around so the notch on 
the bottom of the lower 
handle is facing forward 
as shown in the box 
here. Reassemble, 
placing the bottom 
holes in the handle over 
the weld pins in the 
handle mounting 
bracket.

Reassemble the upper 
handle to the lower handle.

Insert hairpin 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 Cutting Height

IMPORTANT: 

 All wheels must be placed in the same 

relative position. For rough or uneven lawns, move the 
height adjustment lever to a higher position. This will 
help stop scalping of the grass.

An adjusting plate and 
thumb lever at each wheel 
position provides cutting 
height adjustment. Each 
adjusting plate has nine 
height positions. Height of 
cut will change when you 
move the thumb lever 
from one position to 
another. 

Simply depress the 
lever towards the 
wheel and move the lever assembly to desired 
position. See the illustration in the box above.

Adjusting Carburetor

NOTE: A dirty air cleaner may cause an engine to run
rough too. Make sure that the air cleaner is clean and
attached to the carburetor before deciding to adjust the
carburetor. 

To adjust carburetor, please follow the engine manual. 

Handle
Bracket

Handle
Bracket

Rear Discharge 
Door

Wi

re 

Ro

d

Rear Flap

Lower
Handle

Notch

WARNING: 

If any adjustments are made to 

the engine (e.g. carburetor) while the engine is 
running, keep clear of all moving parts. Be 
careful of heated surfaces like the muffler.

Adjustment 

Lever

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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