Instruction manual

USEFUL INFORMATION

In the following five 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 to :

Throttle opening too large.

Air [evert in open position.

Ignition not set just off fully advanced position. .

Lack of fuel because of insufficient flooding.

Lack of fuel because of pipe, or tap, obstruction.

Excessive flooding of carburetter.

Pilot jet chocked.

Oiled up, or fouled, sparking plug.

Stuck up engine valve.

Weak, or broken, valve spring.

Valve not seating properly.

Contact points dirty.

Incorrect contact point gap.

Water on high-tension pick-up.

Moisture on sparking plug.

Engine misses fire may be due to :

Defective, or oiled, sparking plug.

Incorrect contact point gap.

Contact breaker rocker arm sticking.

Contact breaker points loose.

Rocker adjustment incorrect.

Oil on contact breaker points.

Weak valve springs.

Defective sparking plug wire.

Partially obstructed petrol supply.

Loss of power may be due to :

Faulty sparking plug.

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.