Service Manual

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Muffler
ENGINE TOP END 4-23
Muffler Assembly Remo wal
l Unscrew the exhaust pipe mounting nuts, and remove the spring
washes and engine hook (B) [No. 2 Cylinder(C)]. Use a penetrating
oil if necessary to breaking threads.
ORemove the bolts on the muffler bracket and take off the muffler
assembly.
0 Do not use unnecessary force on the exhaust pipes when removing thle
muffler assembly, or they could become damaged or distored.
Muffler Assembly lnstalhtion Notes
@Clean the exhaust pipe flanges to the exhaust port gasket surfaces and
install a new gaskets each time the muffler installed.
l Apply a non-permanent locking agent to the threads of the exhaust
pipe mounting nuts.,
l To prevent mis-threading, finger tight the bolts (A) and nuts first. Next
tighten the nuts, then the bracket (B) mounting bolts.
@After installation, thoroughly warm up the engine, wait unti the engine
cools down and retighten the bolts and nuts.
Inspection
l inspect the exhaust pipes or muffler for dents, cracks, rust and holes.
*If the exhaust pipes or muffler is damaged, it should be replaced for
best performance and leasit noise.
*Check the muffler for distortion and/or loose internal components.
Loss of power could develop if the muffler loose the intern.al
components restricting the exhaust flow.
*Check for breaks in the seams and check weld at the junction of the
exhaust pipes antl muffler.
l Tap the muffier with a plastic hammer to decarbonize.