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Care + Maintenance 

1.  Minimum care is required to ensure smooth operation of 

your mower.

2.  To avoid damage to the mower or cutting blades, keep the 

area to be mowed free from debris.

3.  For best results, regularly apply lubricant to the mower’s 

cutting surfaces, cutting reel axle shaft, and wheels.

Sharpening the Cutting Blades

1.  Spread a thin layer of lapping compound on the front edge 

of the reel blades.

2. 

Adjust the cutting bar so that the blade has light but firm 

contact across the full width of the bar. 

m

CAUTION!

 Do not overtighten the adjusting screws, as 

this could damage the cutting bar. Tighten both screws during 

final adjustment.

3.  Turn the reel blades until the front edge of the cutting bar 

blade is polished.

m

WARNING!

 Clean any grinding compound or debris 

from the cutting bar blade, reel blade, pinions, and pawls.
NOTE: Use industrial or valve lapping compound between 100 

and 240 grit.
NOTE: 

Lubricate the axle and pinion with a light film of wheel 

bearing grease.

Cleaning and Storage

1.  Clean the exterior of the machine thoroughly using a soft 

brush and cloth before storing. Do not use water, solvents, 

or polishes.

2.  Turn the mower on its side to clean the blade area.

m

WARNING!

 Do not place your hands inside or near the 

cutting area. If grass cuttings are compacted in the blade area, 

remove them using a wood or plastic cleaning tool appropriate 

for blade cleaning.

3.  Store the mower in a dry place. Do not place other objects 

on top of the mower during storage.

Maintenance Tips

Reel mowers are relatively low maintenance. For consistent 

cutting, follow the below instructions:

•  Always keep the cutting bar properly adjusted. Refer to the 

instruction manual for further directions.

•  Regularly clean and lubricate cutting edges with light 

 

spray oil.

IMPORTANT!

 Reel mowers have difficulty cutting tall weeds, 

such as dandelions, and will often bend, rather than cut, such 

weeds. Cut often to prevent this.

Service and Support

If your Sun Joe

®

 manual reel mower requires service or 

maintenance, please call the Snow Joe

®

 + Sun Joe

®

 customer 

service center at 1-866-SNOWJOE (1-866-766-9563).

Model and Serial Numbers 

When contacting the company or reordering parts, you will 

need to provide the model and serial numbers of your product. 

These are found on the decal affixed to the housing of your 

reel mower. Copy these numbers into the space provided 

below.

Record the following numbers from the housing or handle of your  

new product:

M  J    5   0   3   M   -    R   M

Model #:

Serial #:

Summary of Contents for Sunjoe MJ503M-RM

Page 1: ...ake sure you get the most out of your product be sure to register online at to enjoy full product support PASTE UPC LABEL HERE A Division of Snow Joe LLC OPERATOR S MANUAL Model MJ503M RM Form No SJ MJ503M RM 880E V1 R MANUAL REEL MOWER 14 INCH 9 CUTTING HEIGHTS RAZOREEL ...

Page 2: ...el mower Always keep proper footing and balance when using this reel mower 5 Do not intentionally strike or hit trees fences or other objects Doing so can cause severe injuries or permanently damage the reel mower s mechanisms 6 Make sure that the reel mower is in proper working order prior to use Do not attempt to operate this reel mower if it is damaged Contact your authorized Snow Joe Sun Joe d...

Page 3: ... presence of children Children are often attracted to the mower and the mowing activity Never assume that children will remain where you last saw them Keep children out of the mowing area and under the watchful care of a responsible adult other than the operator Stay alert and stop the reel mower if a child enters the area Never allow children access to the machine Use extra care when approaching ...

Page 4: ...s and children a safe distance away DANGER Sharp blades can sever fingers and toes Keep away from the cutting area Slip on slope hazard Use extra caution when mowing on slopes to prevent slip and fall accidents CAUTION Beware of stones and other foreign objects that could be thrown from the appliance DANGER Cutting dismemberment hazard Keep hands away from the rotating blades Symbols Symbols Descr...

Page 5: ...l for future reference 1 Foam grip 2 Upper handle bar 2 3 Upper handle knob and bolt 4 Lower handle knob and bolt 2 5 Lower handle bar 2 6 Height adjustment lever 7 Rear wheel 2 8 Front wheel 2 9 Steel blades 10 Reel mower body 5 6 8 7 10 9 3 1 2 4 Technical Data Rotor 5 steel blades Cutting Width 14 in 35 6 cm Cutting Heights 1 1 in 2 9 in 27 mm 73 mm Wheel Size Front 10 in 25 cm Rear 6 in 15 cm ...

Page 6: ...r handle bars using the two knobs and bolts provided Tighten the knobs on each side to ensure a secure fit Fig 1 2 Attach the two upper handle bars to each other using one bolt and knob provided Tighten the knob to ensure a secure fit Fig 2 3 After assembling the handle line up the holes at the lower end of each handle arm with the short posts that extend from the side plates of the mower base Fig...

Page 7: ...etween the blade reel and cutting bar then slowly turn the wheel by hand Fig 6 3 All the blades should slice the paper evenly along the entire length of the cutting bar while the reel is turned smoothly 4 If the mower cuts the paper intermittently adjustment should be made to the appropriate side of the blades to achieve optimal cutting performance Adjusting the Mower Blades 1 Each end of the cutt...

Page 8: ...t growth maintain its health and encourage its natural ability to crowd out unwanted weeds Tall Grass Requires Incremental Cutting 1 For extremely tall grass set the cutting height at the mower s maximum setting for the first pass and then reset it to the desired height and mow a second or third time Fig 9 2 Removing too much of the turf s height especially in the heat of summer can cause root sho...

Page 9: ... 2 Turn the mower on its side to clean the blade area mWARNING Do not place your hands inside or near the cutting area If grass cuttings are compacted in the blade area remove them using a wood or plastic cleaning tool appropriate for blade cleaning 3 Store the mower in a dry place Do not place other objects on top of the mower during storage Maintenance Tips Reel mowers are relatively low mainten...

Page 10: ...10 NOTES ...

Page 11: ...hall be construed as obligating Snow Joe Sun Joe to incorporate such design changes into previously manufactured products nor shall such changes be construed as an admission that previous designs were defective This warranty is intended to cover product defects only Snow Joe LLC is not liable for indirect incidental or consequential damages in connection with the use or misuse of the Snow Joe Sun ...

Page 12: ...sunjoe com ...

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