Complaint : Engine Difficult / Does Not Start

Complaint : Engine Difficult / Does Not Start

CHECK	OBSERVATION	CAUSES	REMEDIES
Crank the engine several times. How is the Cranking pressure	Kick starter Pedal moves freely.	1. Clutch Slippage No Clutch Cable Free Play Stuck Clutch Cable Weak Clutch Springs Worn out clutch plates	Adjust clutch Cable Play Clean and Free the Cable Change the Clutch Springs Replace the clutch plates
		2. Compression weak: Loose spark plug Tight Tappet adjustments Blown cylinder head gasket Leaky valves Worn out/scored cylinder worn out piston rings Jammed piston rings Glazed cylinder Leaky decompressor. Loose cylinder head nuts.	Tighten the spark plug Adjust the tappets correctly Change the gasket Lap the valves Re-bore to next oversize Replace piston rings clean and fit Re-bore the cylinder to next o.s Check and change the gaskets Lap the de-compressor valve. Tighten the nuts
		3. Kick starter Pawl Slipping	Change the Pawl / spring
Remove the fuel hose from the carburetor. Turn the fuel tap to ON/Reserve. Does fuel flow to the Carburetor	No, It Does Not	No Fuel in the Tank Blocked fuel tank cap vent Chocked fuel tap	Fill Up the Tank Clear the vent Clean fuel tap
	Yes, It Flows
Check Fuel, How is it ?	It is stale, gives an offensive odor	Vehicle Not used for long periods	Clean Petrol Tank and Carburetor and fill the tank with Fresh petrol.
	It is adultered	Kerosene or Diesel in Petrol	Select a reliable Pump
	Petrol is OK
Switch 'ON' ignition and crank engine. Does the amp meter needle deflect ?	No, it doesn't	Kill switch circuit open. Defective ignition switch Snapped battery connection Snapped LT lead. CB Points not closing. Open Primary circuits. Fully discharged battery.	Check and correct Replace the ignition switch Check and correct Check and correct Adjust the points Check and correct Charge the battery
	Yes, It always remains in discharged position.	Shorted kill switch Shorted ignition switch C.B Points not opening Shorting at CB Points	Replace the kill switch Replace ignition switch Adjust CB Points Check and correct
	It is OK
Remove spark plug. Cover the spark plug hole with thumb. Crank engine several times. How is the petrol smell ?. Is there petrol stain on the thumb ?	No Petrol smell. No fresh petrol stain on the thumb.	Stuck Open slide valve, less petrol flow to the bowl Blocked carburetor fuel inlet Stuck closed float needle. Float height too high. Blocked pilot jet/pilot discharge orifice. Warped inlet flange. Loose inlet fasteners.	Free the slide valves. Clean the passage Clean and free float needle. Adjust float height. Clear the jet/discharge orifice. Face the flange. Tighten fastners.
	Heavy petrol smell. Petrol wets thumb.	Too rich air petrol mixture from carburetor: Dirt on float needle seat Damaged float needle valve Punctured float assembly. Float height adjusted too low. Loose/Worn out Pilot Jet. Blocked Pilot Jet bleed holes. Stuck open choke. Choke on hot engine. Air screw too far in.	Clean the needle seat. Replace the needle valve. Repair / Replace the float. Adjust float to right height. Tighten / Replace Pilot Jet. Clean the jet bleed holes. Check, clean and fit the choke. Pull choke to 'off' position. Adjust the Air Screw.
	Too much oil on the thumb.	For causes and remedies refer to high lub oil consumption section.
	It is normal
Clean spark plug electrode tips. Set gap. Connect it to HT lead. Earth its body. Turn ignition switch 'ON'. Ensure 'Kill' switch is in 'RUN' Position. Crank the engine. How is the spark?	No Spark	Defective spark plug. Defective plug cap. Open primary circuit. Defective H.T Coil	Change the plug. Change the cap. Check and correct. Change the H.T. Coil
	Red/Yellow Spark	Defective H.T. lead Excessive electrode Gap. Loose Connections. Dirty, pitted CB Points. Discharged battery. Defective H.T. coil.	Replace the H.T. lead. Adjust the gap. Tighten all connections. Clean and adjust C.B Points. Re-charge the battery. Charge H.T. coil.
	Side spark or intermittent spark	Cracked spark plus insulator. Loose connections. Fouled spark plug. Cracked H.T. lead	Change the spark plug. Tighten connections. Clean and adjust the gap. Change the HT lead.
	Light blue solid spark
Is the spark plug of right specification?	No	Shorter reach spark plug	Replace with right spark plug
	Yes
Is the ignition timing correct?	No	Too far advanced/retarded ignition timing.	Adjust ignition timing.
	Yes it is correct.
Then Now engine should start easily. :-)

NOTE:	Combustion elements: Fuel, Air and Heat Right compression heats up the air petrol mixture. Light blue spark at the right time ignites it and the engine starts. Right compression pressure for bullet 6.5 kg/cm2 to 8.5 kg/cm2 Check ignition coil as follows : Remove spark plug cap from H.T lead. Turn ignition switch 'ON'. Hold the lead end abouy 8mm away from cylinder head. Crank the engine. Continuous light blue spark jumping from the lead indicates the primary circuit and the HT coil are OK.

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