Instruction manual

ManualsBrandsA.J.S. ManualsAutomotive18S

The foregoing instructions do not apply to competition models fitted with Racing

Magnetos Type NR1.

SPECIAL NOTE—Check the contact breaker point gap after the first one hundred miles

and five hundred miles. Owing to the initial settling down, there is a tendency

for the gap to alter in the first few hundred miles of use. This may seriously

affect the ignition setting. Subsequent adjustment will only be required at long

intervals but it is as well to check the gap every two thousand miles. (When

the engine is decarbonised is always an opportune time.)

Complete service (dismantling, cleaning, lubrication of the armature shaft bearings, etc.)

should be entrusted to a Lucas Service Station and should be done about every ten

thousand miles.

SPARKING PLUG

The K.L.G. Type FE80 " Corundite " Plug is fitted to all models.

It has a thread of 14 mm. and the reach is ¾". The point gap is .015". Check the point

gap every time the engine is decarbonised and, if necessary, re-set the points.

See the plug is fitted with its external seating washer.

Coat the thread with " Oil Dag "or Graphite paste. (See page 37.)

Firmly tighten the plug by using the standard box spanner and

tommy bar (Part No. 017252.) All that is required is a GAS-

TIGHT joint. Therefore do not over tighten, which will not

make a gas-tight joint more gas-tight, but can, and possibly will,

distort and damage the body of the plug .

Set the gap to .015 inch. NEVER. TRY TO MOVE THE CENTRAL

ELECTRODE. To widen, or narrow, the gap between the

electrodes, only move the earth (or bent over) electrode,

Check the gap first with a gap gauge.

If it is too wide, tap the earth electrode (the bent-over one) to-

wards the central electrode. Use any handy metal tool to do

this, provided it is light enough in weight to be controllable.

Check the gap between each tap and stop when the gauge is a

nice sliding fit between the two electrodes.

If the gap is too narrow to start with, gently lever the earth

electrode away from the central electrode by using a small

screwdriver, and then tap back to the correct position.

Do not move the electrodes apart by forcing anything between

them.

For maximum efficiency, plugs should be cleaned at every 3,000

miles. To take the plug to pieces for cleaning, unscrew the gland

nut by holding the smaller hexagon on the gland nut upside down

in a vice and then using the box spanner to unscrew the larger

hexagon on the body.

Then lift away the central electrode assembly which should be

washed in petrol or paraffin. Then, using fairly coarse glass

paper, remove the carbon deposit and wash again.

The central firing point should be cleaned with fine emery cloth.

The inside of the body should be scraped clean with a knife and

finally rinsed in petrol.

There is an internal washer, between the insulator and its seat-

ing in the body. On re-assembly lightly smear this with thin oil

and then screw up the gland nut sufficiently tight to give a gas-

tight joint.

Finally adjust the gap to ·015"—·018".

Illustration 32