Instruction manual

Engine overheats may be due to :
Lack of proper lubrication. (Quality or quantity of oil.)
Faulty sparking plug.
Air control to carburetter out of order.
Punctured carburetter float.
Engine carbonised.
Weak valve springs.
Pitted valve seats.
Worn piston rings.
Ignition setting incorrect.
Choked silencer.
Engine stops suddenly may be due to :
No petrol in tank, or choked petrol supply.
High-tension wire detached from sparking plug.
Choked main jet.
Oiled up, or fouled, sparking plug.
Water on high-tension pick-up, or sparking plug.
Water in float chamber.
Vent hole in petrol tank filler cap choked.
Excessive oil consumption may be due to :
(a) Clogged, or partly clogged, oil filter.
(b) Stoppage, or partial stoppage, in the pipe returning oil from the engine to the oil
tank.
(c) Badly worn, or stuck up, piston rings. (Causing high pressure in the crankcase.)
(d) Air leak in dry sump oiling system.
(e) Worn inlet valve stems.
Excessive petrol consumption may be due to :
(a) Leaks in the petrol feed system. (Damaged fibre washers, loose union nuts on
piping, defective float needle action.)
(b) Incorrect ignition setting. (Ignition not advanced sufficiently.)
(c) Defective engine valve action.
(d) Incorrect use of air control lever.
(e) Moving parts of carburetter badly worn. (Only possible after very considerable
mileage.)
(f) Bad air leak at carburetter junction, or inlet manifold joint,
ABNORMAL TYRE WEAR
Abnormal tyre wear may be due to :
(a) Incorrect tyre pressure.
(b) Wheels not in alignment.
(c) Harsh driving methods. (Misuse of acceleration and braking.)
EXCESSIVE PETROL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
86
www.ajs-matchless.info