Use and Care Guide
Blade Maintenance
IMPORTANT: The mower blade is sharp and can cause severe 
personal injury if handled incorrectly. Wrap the blade or wear 
protective gloves, and use extra caution when handling.
The steel blade is designed to provide a ne cut in long or 
tough grass. Deterioration in the quality of cut indicates blade 
wear or damage. 
mWARNING! An excessively vibrating lawn mower 
indicates that the blade is not properly balanced or has 
become deformed from striking an object. In this case, the 
blade must be repaired or replaced. Please follow the proper 
maintenance procedures for blade care or call the 
Snow Joe
®
 + Sun Joe
®
 customer service center for assistance 
at 1-866-SNOWJOE (1-866-766-9563).
Blade Replacement
mWARNING! Wear heavy duty gloves when handling the 
blade. 
IMPORTANT: Only use original replacement parts specied for 
this lawn mower.
You can purchase a replacement blade (Model MJ408E-74) 
and other genuine replacement parts by ordering online at 
snowjoe.com or, to order by phone, contact Snow Joe
®
 + 
Sun Joe
®
 customer service at 1-866-SNOWJOE 
(1-866-766-9563). The use of parts that do not meet the 
original equipment specications may lead to improper 
performance of the lawn mower, may compromise operator 
safety, and will void the manufacturer's warranty.
1.  Disconnect the electrical supply to the lawn mower and 
wait until the blade comes to a complete stop.
2.  Turn the lawn mower on its side, put a block of wood 
between the blade and the mower deck to prevent the 
blade from turning. Loosen the blade nut by a 15 mm 
wrench or socket (Fig. 16). 
3.  Remove the blade nut, washer, blade insulator, and the 
blade (Fig. 17).
4.  Make sure the rotor assembly is pushed completely 
against the motor shaft. Place the new blade against the 
rotor assembly. Make sure the new blade is installed with 
the curved ends pointing up towards the mower deck, and 
replace the blade insulation, the blade washer, and the 
blade nut (Fig. 18). 
NOTE: Make sure all parts are placed in the exact order same 
with when they removed. 
Fig. 16
Wood block
Wrench
Blade nut
Blade
Fig. 17
Blade 
insulation
Blade 
washer
Blade nut
Fig. 18
Rotor assembly
Motor shaft
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