58
EXHAUST SYSTEM
An engine’s exhaust system must be able to freely
discharge all high temperature exhaust gas after
combustion to the outside air.
Exhaust resistance must be as low as possible in order
to prevent a decrease in power, however exhaust noise
must be kept at an acceptable level. Careful design is
required to reconcile these two conflicting factors.
Exhaust gas from the exhaust manifold can either be
directly fed into the muffler or routed to a place which
will not interfere with the operator by exhaust pipe.
The most important point in all cases is to reduce back
pressure to a minimum.
Inspect the exhaust system at whole (hoses, clamps,
mixing elbow, manifold, etc.) Check for cracks, leaks and
rust. Tight or change them if necessary.
Check for carbon or soot deposits on exhaust
components as it is a conclusive sign of an exhaust leak.
Should any defect appear on any item of the exhaust
system, replace it as there is a risk of exhaust leakage or
water penetration in the engine.
During any dismantling of the exhaust system, replace
the exhaust seal gasket(s).
S08
MAINTENANCE
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