Royal Enfield CONSTELLATION 1958, Workshop Maintenance Manual

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HOW TO LOCATE AND REMEDY TROUBLE
Condition Possible Causes Method of Detection and Remedy
ENGINE WILL NOT Controls not set correctly for starting. See that the ignition is switched on, petrol turned
START. on and everything is in order for starting.
Contact breaker inoperative. Crank the engine and check that the contact
breaker opens and closes correctly.
Contacts need cleaning and adjusting. Clean and adjust the contact breaker as described
above.
Plugs not sparking. Detach the high tension cables from the plugs.
Hold the cables 1/8” (3.17 mm.) from the engine
and see if a spark jumps the gap when the engine
is cranked.
(i) If a spark is produced, check the plugs by
substitution.
(ii) If no spark is produced, check the cables by
substitution. Clean and check inside of cable
cover.
Defect in cut-out circuit. Disconnect the remote cut-out switch and crank
the engine. If the engine now starts, renew the
connecting cable or switch.
Incorrect timing. Check the magneto-to-engine timing. (See Section C4).
ENGINE MISFIRES. Defective fuel supply. Inspect the carburetter, petrol supply, etc.
Sparking plugs need cleaning and Remove plugs from engine. Clean off soot or
adjusting. carbon and check plug "points" for correct gap
width (.018 in.).
Contacts need cleaning and adjusting. Clean and adjust the contact breaker.
Defective high tension supply. Check high tension cables by substitution.
Clean and check inside of cable cover.
If, after making the above checks, a fault in the magneto is suspected but cannot be located, the nearest Lucas
Service Depot or Agent should be consulted. When communicating with a Service Depot, it is necessary, in
addition to describing the trouble, and the type and year of engine, to state the Model, Type and Service Number
of the magneto.
Section G1d Page 3
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