Maruyama MS072H Manual Del Propietario U Operador página 19

7. TROUBLESHOOTING
・ Where marked with ☆, request adjustment or repair at sales outlet or our
sales office.
Pump
Phenomena
Suck no water
Pressure cannot
be increased.(poor (2) Scratch on the inside surface of cylinder (2) Replace with new one.
spraying state)
Engine
Phenomena
Does not start
Insufficient output
Vibration is
getting heavy
Cause
(1) Loose connecting of suction hose
(2) Suction hose clogged with chemicals
(3) Wear to piston packing
(4) Foreign matter in valve portion
(1) Wear to piston packing
(3) Scratch on delivery valve
(4) Wear to pressure control valve seat
(5) Foreign material on each valve
(6) Wear to cam handle
(7) Wear to nozzle hole
(8) Too high a nozzle number used
Cause
・No fuel
・Fuel filter is clogged
・Mis-starting
・Poor ignition plug
・Poor magnet
・Poor carburetor
・Poor adjustment of throttle wire
・Clogging of air cleaner element
・Carbon building up at exhaust port
and muffler
・Loose part
・Loose muffler and muffler cover
- 18 -
Treatment
(1) Tighten sufficiently.
(2) Disassemble and clean
(3) Replace with new parts
(4) Disassemble and clean
(1) Replace with new one.
(3) Replace with new one.
(4) Replace with new one.
(5) Disassemble and clean.
(6) Replace with new one.
(7) Replace with new one.
(8) Decrease number of
nozzles or replace with
smaller diameter nozzle.
Treatment
・Supply fuel.
・Clean
・Refer item
"Starting engine"
・Replace.
・Replace.
・Replace.
・Adjust.
・Clean.
・Clean.
・Tighten
・Tighten
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