A.J.S. 16 Instruction Book - Useful Information
USEFUL INFORMATION
In the following paragraphs are particulars of failures and troubles that can occur
together with the probable reasons. These troubles are arranged in the order of their
probability.
TRACING TROUBLES
Engine fails to start, or is difficult to start, may be due t o :
Water on high-tension pick-ups, or distributor.
Moisture on sparking plugs.
Oiled up, or fouled, sparking plugs.
Throttle opening too large.
Pilot jet choked.
Air lever in open position or bad air leak at carburetter joints.
Lack of fuel because of insufficient flooding.
Lack of fuel because of pipe, or tap, obstruction.
Excessive flooding of carburetter (with hot engine only).
Stuck up engine valve.
Weak, or broken, valve spring.
Valve not seating properly.
Contact points dirty.
Incorrect contact point gap.
Ignition not switched on.
Discharged battery.
Engine misses fire may be due to :
Defective, or oiled, sparking plugs.
Incorrect contact point gap.
Contact breaker lever sticking.
Contact breaker points loose.
Rocker adjustment incorrect.
Oil on contact breaker points.
Weak valve springs.
Defective sparking plug wire.
Partially obstructed petrol supply.
Ignition switch at EMG.
Loss of power may be due to :
Faulty sparking plugs.
Lack of oil in tank.
No rocker clearance, or too much clearance.
Weak, or broken, valve spring.
Sticky valve stem.
Valve not seating properly.
Brakes adjusted too closely.
Badly fitting, or broken, piston rings.
Punctured carburetter float.
Engine carbonised.
Choked silencer.
Bad air leak between carburetter and head, or manifold.
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