Maruyama MCV51 - Troubleshooting Common Issues; Common Malfunctions and Their Causes

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Trouble shooting
Malfunction System Observation Cause
Chain does not run Chain brake Engine runs Chain brake actuated.
Engine does not start or Ignition system Ignition spark Malfunction in fuel supply system, com-
onlywithdifculty   pressionsystem,mechanicalmalfunction.
No ignition spark Switch on STOP, fault or short-circuit in the
wiring, plug cap or spark plug defective.
 Fuelsupply Fueltankislled CombinationswitchinChokeposition, 
carburetor defective, suction head dirty, fuel
line bent or interrupted.
Compression Inside Cylinder base packing ring defective, radial
system shaft packings defective, cylinder or piston
rings defective
Outside Spark plug does not seal.
Mechanical Starter does not engage Spring in starter broken, broken parts
malfunction inside the engine.
Warmstartdifculties Carburetor Fueltankislled Wrongcarburetoradjustment.  
Ignition spark
Enginestarts,but Fuelsupply Fueltankislled Wrongidlingadjustment,suctionheador 
dies immediately carburetor dirty.
Tank venting defective, fuel line interrupted,
cable defective, Combination switch defective
Insufcientpower Severalsystems Engineisidling Airlterdirty,wrongcarburetoradjustment, 
 maybeinvolved  muferclogged,exhaustchannelincylinder 
simultaneously clogged, spark arrester screen clogged.
No chain lubrication Oil tank/pump No oil on the chain Oil tank empty.
Oil guide groove dirty.
Oil-pump adjusting screw incorrectly adjusted.