Maintenance
maintenance table
before every new
use
after first 5 hours every 25 hours every 100 hours or
every year
after 200 hours
rubber mounts check replace
screws and nuts check
throttle cable
function
check
ignition kill switch
function
check
fuel system check
air box rubber fitting check replace
drive belt check replace
spark plug cap fitting check
carburetion and
combustion / spark
plug image
check check
spark plug check replace
muffler springs replace
carburetor
membranes and
gaskets
check replace
starter rope / or
complete starter
replace
fuel lines replace
Reed valve replace
exhaust silencer
dampening material
replace
piston and rings replace
crankshaft bearings replace
Combustion and Spark Plug Image
The way the spark plug looks like showing you the quality of combustion. With a correct
combustion the engine is giving best performance and life span of the engine will be
longest. Generally speaking, a to rich setting will never kill the engine but making it
perform improperly, causing a rough run and making the engine shake in low and medium
RPM's. Exhaust will smoke extensively and oil dropping out. In long term spark plug
getting soiled making it fail and accumulation will effect piston and cylinder head.
A to lean setting will result in increased abrasion of piston, rings and cylinder and giving
insufficient lubrication to bearings. Engine temperature increases resulting in a generally to
hot engine run and damages may occur soon. A far to lean running engine will fail quickly
or even instantly (piston head surface getting burned and forming a hole, resulting in
instant loss of compression and engine stops, or piston and rings start to scratch cylinder
surface and seize).
The following pictures will help you to understand the correct combustion by showing the
condition of the spark plug.
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