Replacing The Spark Plug; G.insl:_Cting The Muffler - Ryobi 700r Operator's Manual

REPLACING THE SPARK PLUG
Use e Champion RDJ7Y spark plug (or equivalent)+
Correct air gap is 0_020 In (0,5 mm), Remove plug
after every 50 hours of operation and check Its
condition.
1+ Stop the engine and allow it to cool+Pull the
wire off of the spark plug.
2. Clean around the spark plug and remove it from
the cylinder heed. Use a 5/8" socket to remove
the plug.
CAUTION: Replace a cracked, fouled
or difty spark plug. Do not send blast,
scrape, or clean electrodes because
the engine could be damaged by grit
entedng the cylinder,
3. Set the air gap at 0+020In (0.5 ram) using a
wire feeler gauge (Fig, 27). Install a correctly
gapped spark plug into the cylinder head.
Torque to 110-120 in,tb (12._.13.5 N,m).
0.6"20 In
(0.5 mm)
Rg. 27
INSPECTING THE MUFFLER
_e mufflershouldbe removedevery 25 horns of
obera_n to Inspectfor excessivecarbon
build-up. Excessivedeposits around the exhaust
port (Fig+ 28)orexhaustholes will cause poor
engineperformance.
Use the foIldwt_gprocedure to remove, inspect,
and reinstallthe muffler.
J_b ARNING: To avoid serious personal
injury,make sure that the muffler is
cool before removing and inspecting,
Removing Muffler
1. Remove the muffler mounting bolts (Fig. 28).
2. Remove the muffler (with heat shield) and
gasket, Discard the old gasket.
Muffler Mounting Bolts
_ Exhaust
Port
Fig. 28
3. Check the inletpert of the muffler and outlet
port of the cylinder for excessive carbon
deposits (Figs. 29 and 30). Clean or replace
the muffler
as requli3_dJ
If the outlet port of
the cylinder is plugged, contact your
authorized service dealer_
4. Inspect the muffler mounting holes for
elongation, Replace the muffler and muffler
bolts if the holes are elongated.
Fig, 29
Outlet Port _ Cylinder
Muffler Gasket
Fig. 30
Reinstalling Muffler
1J Install a new gasket. Make sure the arrow
stamped into the gasket is to your right. Tuck
the tab (with the arrow) between the cylinder
end plastic shroud (Fig. 30).
2. Install the muffler with the muffler mounting
bolts (Fig. 28) and torque the bolts to
80-90 in*lb (9-10.1 N,m).
16