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12

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

Figure 13

Blade Care

Periodically inspect the blade adapter for cracks, 
especially if you strike a foreign object. Replace 
when necessary.

WARNING: 

When removing the cutting

blade for sharpening or replacement, protect
hands by using heavy gloves or a rag to grasp
the cutting blade. 

WARNING: 

Periodically inspect the blade

adapter for cracks or damage, especially if
you strike a foreign object. Replace
immediately if damaged.

Remove the bolt and blade support or bell washer 
which hold the blade and adapter to the engine 
crankshaft. See Figure 14. Remove the blade and 
adapter from the crankshaft.

When sharpening the blade, follow the original 
angle of grind as a guide. It is extremely important 
that each cutting edge receives an equal amount of 
grinding to prevent an unbalanced blade. 

Figure 14

NOTE: 

An unbalanced blade will cause excessive

vibration when rotating at high speeds and may cause
damage to the mower and/or personal injury.

The blade can be tested by balancing it on a round 
shaft screwdriver. See Figure 15. 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 15

Before reassembling the blade and the blade 
adapter to the unit, lubricate the engine crankshaft 
and the inner surface of the blade adapter with light 
oil (or engine oil). Also lubricate the bolt holes, bolts 
and inner surface of the nuts. 

Install the blade adapter on the crankshaft with the 
“star” away from the engine. Refer to Figure 14. 
Place the blade with the side marked bottom (or 
with part number) facing away from the adapter. 

Align the blade bell support over the blade with the 
tabs in the holes of the blade and insert the hex 
bolt. Tighten the hex bolt to the torque listed in the 
“Blade Mounting Torque” section below.

Blade Mounting Torque

Center Bolt: 450 in. lbs. min., 600 in. lbs. max.

IMPORTANT:

To ensure safe operation, 

all

 nuts and 

bolts must be checked periodically for correct tightness.

Deck Care

NOTE: 

We do not recommend the use of pressure

washers or garden hose to clean your unit.These may
cause damage to electric components, spindles,
pulleys, bearings or the engine. The use of water will
shorten life of the mower and reduce its serviceability. 

The underside of the mower deck should be 
cleaned after each use to prevent a buildup of 
grass clippings, leaves, dirt or other matter. If this 
debris is allowed to accumulate, it will invite rust 
and corrosion, and may cause an uneven 
discharge of grass clippings at the next cutting.

The deck may be cleaned by tilting the mower and 
scraping clean with a suitable tool (make certain the 
spark plug wire is disconnected).

Engine

Refer to the separate engine manual.

Handle
Bracket

Handle
Bracket

Rear Discharge 
Door

Rear 

Wi

re 

Ro

d

Flap

Blade Adapter

Blade

Blade
Bell
Support

Hex Bolt

1. Insert screw driver through hole

2. Blade should be parallel to ground

Screw 

Driver

Ground

Blade

Summary of Contents for PR-521

Page 1: ...covered land unless the engine s exhaust system is equipped with a spark arrester meeting applicable local or state laws if any If a spark arrester is used it should be maintained in effective workin...

Page 2: ...epartment or an authorized dealer You can locate the model number by standing in the operating position and looking down at the rear of the deck A sample model plate is explained below For future refe...

Page 3: ...n bystanders helpers and pets at least 75 feet from the mower while it is in operation Stop machine if anyone enters the area 6 Always wear safety glasses or safety goggles during operation and while...

Page 4: ...r 5 Keep children away from hot or running engines They can suffer burns from a hot muffler 6 Never allow children under 14 years old to operate a power mower Children 14 years old and over should rea...

Page 5: ...nd 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 dama...

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: ...lower handles for shipping purposes Pull up and back on the upper handle to raise the handle into the operating position Make certain the lower handle is seated securely into the handle mounting brack...

Page 8: ...Your lawn mower is equipped with both a mulching baffle and a mulching plug While the mulching baffle is located at the rear of the mower the mulching plug is located on the right side of the cutting...

Page 9: ...g are used only for mulching purposes Instead of collecting the grass clippings in a grass catcher some mower models have the option of recirculating the clippings back to the lawn This is called mulc...

Page 10: ...To Stop Engine and Blade Release the blade control handle to stop the engine and blade WARNING The blade will continue to rotate for three seconds after the blade control lever is released Disconnect...

Page 11: ...the handle in the higher height position To lower the handle height for your convenience proceed as follows Remove the starter rope from the rope guide Remove the upper handle by removing the hand kn...

Page 12: ...he blade adapter with light oil or engine oil Also lubricate the bolt holes bolts and inner surface of the nuts Install the blade adapter on the crankshaft with the star away from the engine Refer to...

Page 13: ...with light oil Engine oil may also be used Engine Follow engine manual for instruction and schedule of lubrication NOTE When tipping the unit empty the fuel tank and keep engine spark plug side up SE...

Page 14: ...tank with clean fresh gasoline 3 Refer to the engine manual packed with your unit Engine overheats 1 Engine oil level low 2 Dirty aircleaner 3 Air flow restricted 4 Carburetor not adjusted 1 Fill cra...

Page 15: ...15 NOTES...

Page 16: ...16 NOTES...

Page 17: ...17 NOTES...

Page 18: ...1 11 9 7 82 16 15 18 3 2 19 4 6 4 31 50 48 47 44 45 64 56 20 55 63 36 34 33 32 40 39 57 59 20 45 44 43 41 42 59 23 66 67 58 30 51 53 62 65 81 49 22 72 21 14 13 12 71 52 54 39 40 29 A A 83 45 46 76 80...

Page 19: ...48 732 0417A Rear Spring Lever 49 14578 Height Adj Assy Comp RH N I 14579 Height Adj Assy Comp LH 50 14765 Pivot Bar R H N I 14766 Pivot Bar L H 51 782 5002 Front Baffle 52 710 0654A Hex L Wash Scr 3...

Page 20: ...det equipment used commercially is warranted for one year only Commercial use is defined as either having hired operators or used for income producing purposes Items not covered The warranty does not...

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