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TROUBLESHOOTING

26

C A U S E

A C T I O N

Oil in cutting head 

Clean the cutting attachment 

If further assistance is required, contact your authorized service dealer. 

C A U S E

A C T I O N

Cutting head bound with grass

Stop the engine and clean cutting attachment

Cutting head out of line

Refill with new line

Inner reel bound up

Replace the inner reel

Cutting head dirty

Clean inner reel and outer spool

Line welded

Disassemble, remove the welded section 
and rewind the line

Line twisted when refilled

Disassemble and rewind the line

Not enough line is exposed

Push the Bump Knob and pull out line until 
4 inches (102 mm) of line is outside of the 
cutting attachment

C A U S E

A C T I O N

Old Gasoline

Drain fuel tank / Add fresh Gasoline

Improper carburetor adjustment

Take to an authorized service dealer for 
carburetor adjustment

Clogged Spark Arrestor Screen 

Clean or Replace. See Pg. 24 

C A U S E

A C T I O N

Ignition switch is OFF

Turn switch to ON

Empty fuel tank

Fill fuel tank

Primer bulb wasn't pressed enough

Press primer bulb fully and slowly 5-7 times

Engine flooded

Use starting procedure with choke lever in the 
RUN position, Pg. 12

Old Gasoline

Drain fuel tank / Add fresh Gasoline

Fouled spark plug

Replace or clean the spark plug

ENGINE WILL NOT START

ENGINE WILL NOT IDLE

ENGINE WILL NOT ACCELERATE

ENGINE LACKS POWER OR STALLS WHEN CUTTING

C A U S E

A C T I O N

Air Filter is Plugged

Replace or clean the air filter

Old Gasoline

Drain fuel tank / Add fresh Gasoline

Improper carburetor adjustment

Adjust per instruction Pg. 20

C A U S E

A C T I O N

Old Gasoline

Drain gas tank / Add fresh Gasoline

Improper carburetor adjustment

Take to an authorized service dealer for 
carburetor adjustment

Cutting head bound with grass

Stop the engine and clean the cutting attachment

Dirty air filter 

Clean or replace the air filter 

Clogged Spark Arrestor Screen 

Clean or Replace. See Pg. 24 

CUTTING HEAD WILL NOT ADVANCE LINE

CUTTING LINE ADVANCES UNCONTROLLABLY

Summary of Contents for 875r

Page 1: ...875r 4 Cycle Gas Trimmer OPERATOR S MANUAL FOR QUESTIONS CALL 1 800 345 8746 in U S or 1 800 265 6778 in CANADA www ryobi com IMPORTANT MANUAL DO NOT THROW AWAY...

Page 2: ...E UNIT TO THE RETAILER NOTE PROOF OF PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE Make sure this manual is carefully read and understood before starting or operating this equipment THIS PRODUCT IS C...

Page 3: ...estor If it requires replacement ask your LOCAL SERVICE dealer to install the Accessory Part 180890 Spark Arrestor Screen FOR QUESTIONS CALL 1 800 345 8746 IN U S OR 1 800 265 6778 in CANADA Californi...

Page 4: ...Failure to so can result in personal injury to the operator and bystanders as well as damage to the unit Use only 0 080 inch 2 03 mm diameter genuine Ryobi replacement line Never use metal reinforced...

Page 5: ...unit only in a well ventilated area outdoors Wear safety glasses or goggles that are marked as meeting ANSI Z87 1 1989 standards and ear hearing protection when operating this unit Wear a face or dus...

Page 6: ...arnings and safety instructions Failure to do so can result in serious injury to the operator and or bystanders FOR SERVICE INFORMATION CALL USA 1 800 345 8746 CANADA 1 800 265 6778 WEAR EYE AND HEARI...

Page 7: ...get extremely hot from operation When turned off they remain hot for a short time SHARP BLADE WARNING Sharp blade on cutting attachment shield To prevent serious injury do not touch line cutting blad...

Page 8: ...ed with the 875r See list of add ons on page 13 Cutting Attachment Shield Fuel Cap Throttle Control J Handle Cutting Attachment Shaft Grip Primer Bulb Choke Lever Oil Fill Plug Dipstick Air Filter Cov...

Page 9: ...3 position the J handle to the location that provides you the best grip Decal ADJUSTING THE J HANDLE 1 Loosen the four 4 screws holding the J handle in place Fig 1 Do not completely remove the screws...

Page 10: ...tle of SAE 30 SF SG SH oil Fig 4 NOTE Save the bottle to measure the correct amount for future oil changes See Changing the Oil Pg 19 1 Unscrew the top of the bottle of oil and remove the paper seal c...

Page 11: ...he primary reason for the unit not running properly Be sure to use fresh clean unleaded Gasoline NOTE This is a four cycle engine In order to avoid damage to the unit do not mix oil with Gasoline Defi...

Page 12: ...oline has not entered the bulb press three more times or until it does 4 Squeeze the throttle control to the wide open full throttle position 5 With the unit in the starting position Fig 10 pull the s...

Page 13: ...Turn the knob counterclockwise to loosen Fig 11 2 Press and hold the release button Fig 11 3 While firmly holding the upper shaft housing pull the cutting attachment or add on straight out of the Cli...

Page 14: ...ever possible Cutting to the right improves the unit s cutting efficiency Clippings are thrown away from the operator Slowly move the trimmer into and out of the cutting area at the desired height Mov...

Page 15: ...ed service dealer MAINTENANCE SCHEDULE These required maintenance procedures should be performed at the frequency stated in the table They should also be included as part of any seasonal tune up MAINT...

Page 16: ...g line Wind the inner reel with new line Install a prewound inner reel Winding the Inner Reel With New Line NOTE It Is unnecessary to remove the bump knob to install new trimming line 1 Cut two pieces...

Page 17: ...ding slots in the inner reel Fig 22 Releasing the Inner Reel If the SpeedSpool does not release line correctly pull the ends of the line firmly from the spool Fig 22 If this does not release line foll...

Page 18: ...and tighten clockwise 9 Install new line as described in Line Installation for the SpeedSpool Pg 16 5 Clean the shaft and the inner surface of the outer spool To clean the shaft underneath the plunge...

Page 19: ...THE OIL For a new engine change the oil after the first 10 hours of operation Change the oil while the engine is still warm The oil will flow freely and carry away more impurities CAUTION Wear gloves...

Page 20: ...lter in detergent and water Fig 33 Rinse the filter thoroughly and allow it to dry 4 Apply enough clean SAE 30 motor oil to lightly coat the filter Fig 34 Air Filter Choke Lever Air Filter Cover Tab F...

Page 21: ...structions to prevent serious personal injury If after checking the fuel and cleaning the air filter the engine still will not idle adjust the idle speed screw as follows 1 Start the engine and let it...

Page 22: ...This requires disassembly of the engine If you feel unsure or unqualified to perform this take the unit to an authorized service center NOTE Inspect the valve to rocker arm clearance with a feeler gau...

Page 23: ...ver Slip the long tabs on the muffler cover into the engine cover Slide the notches on the side of the muffler cover over the tabs on the engine cover and snap into place Fig 38 14 Check the spark plu...

Page 24: ...UTION Do not sand blast scrape or clean electrodes Grit in the engine could damage the cylinder 4 Install a correctly gaped spark plug in the cylinder head Tighten by turning the 5 8 in socket clockwi...

Page 25: ...d parts and tighten loose screws nuts or bolts The unit is ready for storage TRANSPORTING Allow the engine to cool before transporting Secure the unit while transporting Drain the gas tank before tran...

Page 26: ...Pg 24 C A U S E A C T I O N Ignition switch is OFF Turn switch to ON Empty fuel tank Fill fuel tank Primer bulb wasn t pressed enough Press primer bulb fully and slowly 5 7 times Engine flooded Use s...

Page 27: ...ed Carburetor Diaphragm All Position Starter Auto Rewind Muffler Baffled with Guard Throttle Manual Spring Return Fuel Tank Capacity 20 oz 591 ml Fuel Tank HD Polyethylene ENGINE DRIVE SHAFT CUTTING A...

Page 28: ...NOTES 28...

Page 29: ...he engine or equipment is delivered to the retail purchaser The manufacturer warrants to the initial owner and each subsequent purchaser that the engine is free from defects in material and workmanshi...

Page 30: ...ial or workmanship will be repaired or replaced by an authorized RYOBI service dealer without charge for parts and labor The RYOBI Product including any defective part must be returned to an authorize...

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