Service manual

11-3
Loose spark plug Tighten spark plug
Loose cylinder head nuts Tighten cylinder head nuts
Blown cylinder head gasket Change cylinder head gasket
Auto Decompressor mechanism stuck in Ensure flyweight in exhaust cam
open position gear assembly in free to operate.
Valves Leaking due to poor seating/burnt Check & Correct
valves or seats
Piston Rings Worn out Replace piston rings
Worn out / scored/ glazed cylinder barrel Replace cylinder barrel/piston
Piston rings stuck in piston grooves Clean, check and refit/replace
piston rings
Complaint : Engine starts but switches OFF
General Idling RPM low Adjust the idle air bypass
screw in the throttle body
Fuel is stale due to vehicle being in Clean petrol tank and carburetor
storage for a long period and fill the tank with fresh petrol
Fuel adulterated Refill with good fuel
Fuel level very low in tank Fill up the tank
Vent hole clogged in fuel tank cap Clean vent hole.
Fuel Line Clogged Clean the fuel line.
Fuel hose cracked resulting in fuel leaking Check and replace
out and not getting supplied to injector
Fuel pump pressure insufficient/fuel pump Check fuel pump coupler
not working connection/ Check fuel pump
relay for proper working
Fuel Injector partially blocked Replace fuel injector.
Loose / damaged throttle body to engine Check and correct
hose / air filter to throttle body
Weak Battery Charge / Replace the battery
Electrical connections Loose Check & Correct
Incorrect Electrode gap Adjust the gap
Spark plug electrode dirty / fouled Clean park plug & Reset gap.
Wrong specification spark plug Fit the correct Spark Plug
Loose HT connections/ damaged HT lead Fix connections firmly/
Replace Lead.
Complaint : Idling Erratic / high
Idling RPM High Adjust the idle air bypass screw
in the throttle body
No throttle cable free play Adjust throttle cable free play
Stuck throttle inner cable Clean / Replace cable
Loose / damaged throttle body to engine Tighten / replace the hose
hose / air filter to throttle body
Suction leakage Check and correct
Observation Causes Remedies
Poor Cranking
Fuel Related
Electricals Related
General
Trouble Shooting