NGP S421-C - Troubleshooting, Storage, and Environment; Engine Lacks Power Issues; Servicing and Warranty

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ENGINE LACKS POWER
Possible Cause
Correction
1.Check air cleaner
Air cleaner elements clogged.
Clean or replace air cleaner
elements.
2. Check fuel
Bad fuel; engine stored without
treating or draining petrol, or
refueled with bad petrol.
Drain the fuel tank and
carburetor. Refuel with fresh
petrol.
3.Take engine to an authorized
Repair Agent, or refer to shop
manual.
Fuel filter clogged, carburetor
malfunction, ignition
malfunction, valves stuck, etc.
Replace or repair faulty
components as necessary.
Tune up Specifications
ITEM
SPECIFICATION
MAINTENANCE
Spark plug gap
0.028-0.031 in(0.7-0.8 mm)
Refer to page8.
Valve clearance (cold)
IN:0.06±0.02mm
EX;0.08±0.02mm
See your authorized dealer
STORAGE
The same petrol must not remain in the tank for more than one month.
Thoroughly clean the mower and store it indoors in a dry place.
THE ENVIRONMENT
In order to protect the environment, we recommend that the following points should be given special
consideration:
 Always use pure unleaded petrol.
 Always use a funnel petrol can with a level control to avoid spillage when refilling the fuel tank.
 Do not fill the fuel tank completely.
 Do not overfill with engine oil.
 When changing the oil, ensure that all the used oil is collected. Avoid spillage .Take the used oil to a
recycling unit.
 Do not dispose of used oil filter in a rubbish bin. Take it to a recycling unit.
 Replace the silencer if faulty.
 When carrying out repairs, always use genuine spare parts.
 Always seek professional help when the carburetor requires an adjustment.
 Clean the air filter according to directions.
 When, after many years of service, your machine needs to be replaced or is no longer required, we
recommend that the machine is returned to your distributor for recycling.
SERVICING & WARRANTY
This Product comes with a 1 Year Mechanical Warranty
Genuine spare parts are supplied by service workshops and by many dealers. We recommend that
you take the machine to an authorized Repair Agent for annual servicing, maintenance and
inspection of safety equipment. For service and spare parts, please contact the dealer where the
machine was purchased or call 0800 100 045 or e-mail parts@macvad.com.