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PRODUCT SPECIFICATIONS
MODEL NUMBER 917.377631
SERIAL NUMBER
DATE OF PURCHASE
HORSEPOWER: 6.75
DISPLACEMENT: 12.56 CU. IN.
GASOLINE CAPACITY/TYPE: 1.25 QUARTS
UNLEADED REGULAR
OIL TYPE (API-SF/SG/SH): SAE 30 (ABOVE 32°F)
SAE 5W-30 (BELOW 32°F)
OIL CAPACITY: 20 OZS.
SPARK PLUG(GAP: °030") CHAMPION RN4C
VALVE CLEARANCE: INTAKE: .004 - .008
EXHAUST: .004 - .008
SOLID STATE IGNITION
AIR GAP: .0125 IN.
BLADE BOLT TORQUE: 35-40 FT. LBS.
• The model and serial numbers will be found on a decal attached to the rear of the
lawn mower housing.Record both serial number and date of purchase in space
provided above.
LAWN MOWER
Alwaysobservesafetyruleswhen performing
anymaintenance.
TIRES
• Keep tiresfreeofgasoline,oil,or insect
controlchemicalswhichcanharmrubber.
• Avoid stumps,stores, deepruts,sharp
objectsand otherhazardsthatmaycause
tiredamage.
BLADE CARE
Forbestresults,mowerblade mustbe kept
sharp. Replacebentor damagedblades.
TO REMOVE BLADE
• Disconnect sparkplugwirefromsparkplug
and placewirewhere itcannotcomein
contactwithsparkplug.
•Tum lawnmoweron itsside. Make sureair
filterand carburetor are up.
• Use a woodblockbetween bladeand
mowerhousingto preventbladefrom
tumingwhen removingbladebolt.
• Protectyourhandswithglovesand/orwrap
bladewithheavycloth.
• Remove blade bolt byturningcounter-
clockwise.
• Removebladeand attachinghardware
(boll lockwasherand hardenedwasher).
NOTE: Removethe blade adapterand check
the key insidehubofblade adapter. The key
mustbe in goodcondifiontoworkproperly.
Replaceadapterifdamaged.
TO REPLACE BLADE
• Posifionthe bladeadapteronthe engine
cranksha_ Besure keyinadapterand
crankshaftkeywayare aligned.
• Pos'Cdonbladeontheblade adapteraligning
the two(2)holesinthebladewiththe raised
lugsonthe adapter.
• Be surethetrailingedge ofblade (opposite
sharpedge)isuptowardthe engine.
• Installthe bladeboltwiththelockwasher
and hardenedwasherintobladeadapter
and crankshaft.
• Use blockof woodbetweenbladeand lawn
mowerhousingandtightenthe bladebolt,
tumingclockwise.
• The recommendedtighteningtorqueis35-
40 It. bs.
IMPORTANT: Bladeboltisgrade8 heat
treated.
11
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