1929-07-20 — Page 14

THE HONGKONG TELEGRAPH, MOTORING SUPPLEMENT.

TEN YEARS BEHIND.

GAS TAX TOTAL HIGHL

DEATH'S SCYTHE.

Floures compiled by Michigan Motor vehicle registration out-

Gasoline taxos collected in this alde of the United States now is country during 1928 amounted to show that the automobile is one of 7,285,000 units, compared with more than $306,233,000, accord- the ten chief causes of death in 7,585,000 units registered in Aming to the U. S. Bureau of Public every 5-year age group. From the to it is second to erica in 1919, according to the Roads. This tax was realized from ages of 5 National Automobile Chamber of the consumtion of more than 10,- diphitherin; 15 to 19 second. to

tuberculosis, Commerce,

178,314,700 gallons of gasolin".

SATURDAY, JULY 20, 1929.

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NOTHING BETTER THAN

Thirty-seven Silver Anniversary Buicks vialt Yosemite National Park, California, to test the performing qualities of the current models on a 400-mile drive over open highway, moun tain roads and steep grades.

WHEN THE

SPARK FAILS.

Ignition Troubles and Their Causes.

HOW ΤΟ CURE THEM.

ENGINE TROUBLE.

THE HONGKONG AUTOMOBILE

"ASSOCIATION

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Fres Legal Advice. Boliable Drivers Suppiled Free Mechanical Advice

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FOR ALL CLASSES

Spark Plug Operation,|| OF

USEFUL HINTS.

By Israel Klein.]

The high compression and fnat speeding engine in use to-day' has raised. the importance of the spark plug in the proper opera- tion of the motor. Considerably

It can be safely assumed that if Therefore, the two terminals on greater demand is made upon it there is misfiring that current is the coil should be examined to en-and a greater variety of plugs being generated. On the other sure that the primary leads are has been found necessary to fur- Usually these are so nish the best performance under hand, there is the possibility of the connected. ignition cutting-out completely, well secured that it is unlikely a varying conditions.

To operate tha motor cffi- which proves trouble at its source. disconnexion would occur. A lend

the motorist The first detail to suspect is the might conceivably break, in which ciently, therefore, contact breaker-a striking rocker case a new sertion can easily be should become acquainted with which keeps the contact perman- put in. It should be kept in mind proper spark plug operation and: ently open. It is not so frequent that a loose connexion at the coil adjustment. a defect as it used to be owing to might cause misfiring.

Any serious internal fault in A large percentage of engine the improved construction adopted. If, however, it does occur it is a either coil or magneto which may trouble may be traced simple matter to detach the rocker cause cutting-out can only be re-park plugs and eliminated by by releasing the spring holding it; medied by the manufacturers or knowing what to do under the then clean the pivot pin thorough repairera, us it would be a case of circumstances. If the motor is In an hard to start, if it misses at low ty. The hole in the fore insulat- a fault in the windings. ing buah will alad require touching extreme, instance

་

to the

of complete idling speeds,, if it is sluggish, if

up, but not with a round file or breakdown another unit mitat be it loses power on long runs, at drill on any account. Cae a obtained, not a dificult matter, high speed, on hills or on a hard tightly rolled-up piece of the nest thanks to standardization.

Ipull, the spark plugs should be Jexamined. Any of these condi emery paper to twirl inside the

Deteriorated Plug Leads..

tions may be due to dirty plugs. holo to clean it. The cause of a

All that is needed to correct slicking rocker is damp having got Faults in the plug leads, though: into the magneto. If a car is left very infrequent unless the lead such faults is to clean the plugs standing, in a damp garage this have been many years in use, comun, if the car has gono

prise leakage or short-circuiting 10,000 miles with the same spark trouble may becur.

Home

now

In the case of coil ignition this due to deterioration of the insula plugs, to replace them with is not self-generating as is the tion, which may have developed ones. This mileage is about the mugnete, and any cutting-out feracks through which the current limit at which engineers put the would indicate that current was will spark to an adjacent lead in life of spark plugs. After that not passing through the coil. a similar condition. It is always they cannot be expected to

advisable to replace, these leads ate efficiently.

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oper-

To clean spark plugs, 11 the

with new sections rather than to wrap them with insulating tape. This method, however, may be lower part of the plug with neo- adopted for an emergency and bol, metal nollah or equal parts temporary repnir if a lead has of numonia and water, and let short-circuited on to a metal part stand for a few minutes. Rub the carbon from the insulator Jand thereby chafed

with a cloth-covered stiff wire or through.

wooden peg. Then wipe the plug dry. Clean the points with em-

or word

The Sparking Cap. The setting of the gap of the ery cloth and adjust the points.

Adjustment of the apark make-und-break on the contact

gap is important. The breaker of a magneto is a matter plug

This kap for use in average motors of particular Importance. setting is determined by the munu- should be not wider than .026 facturers, who either supply a inch. For high compression mo-

At steel gauge or state in their tors it should be .020 inch. instruction booklet the width of the same time the distributor con. the gap in thousandths of an inch, tact points should be adjusted. be between 016 so that the ordinary standard These should thickness gauges can be used. and .020 Inch in width of gap.. These are sold by all leading

The reason for the shorter gap jaccessory concerns.

In spark plug and distributor in high compression, high speed mo

The Cut-Out.

A magnoto Is usually providedtors is that less time is afforded with a switch on the facia board, the ignition coll to build up the which is connected by a single voltage necessary for the proper

spark. wire to a terminal on the cover of

.

Even when the motor is not of

MOTOR

INSURANCE

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China Underwriters,

Ltd.

HEAD OFFICE Hongkong Bank Building,

4a Des Voeur Road Central. Tel. 0, 1121-22,

CHRYSLER -above

all others.

the make-and-break. If this wire should become loose at the terminal the magneto will not the high compression type, it switch off definitely, but the firing it is operated at high epeds, it re- the quires a different type of spark will continuo jerkily. If switch wire becomes detached the plug from that used for average magneto cannot be switched off driving. And even with the prop Misfiring may be caused if the er spark plug, the distributor switch wire should touch the may cause trouble.

If the gaps between the distrib frame at any point through the insulation being worn or damaged. utor contact points are too wide, trouble may be experienced at high speed, while satisfactory A Cause of Difficult Starting. Condensed moisture on the in-operation may be had at low la too sulators of the plugs will prevent speed. And if the gup (starting-up. This moisture may small, the trouble may be re- form when a car has been stand-versed.

unwarmed Too small a gap in the distrib ing overnight in an garage. The insulators should bejutor may cause almost constant wiped over with a clean absorbent cantuet from one point to anoth- SOLE AGENTS

er, there will not be a clean, sharp rag thoroughly to dry them,

Now that coll ignition is no break as required for proper op- largely used It is important to keep eration, and the coll will not be In mind that the battery is the able to build up a high enough soureo of current. If, by any mis-voltage to deliver to the plugs. chance, the battery should get

The ignition system therefore completely run down, the engine

be checked up every could not be started until an should auxiliary battery was connected 1000 miles, with special view to- A run-down battery will, ward keeping the breaker however, recover sufficient voltage tacts clean, square, and at the to work the coll if it be allowed proper gap, cleaning the spark to rest on open cireult from one plugs and checking up the gaps to two hours,

between the electrodes.

jup.

*

con-

The Republic Motor Co.

of China.

(Buccessors A. LUNG & Co.

Auto Dept.).

30 32, Des Voeux Road.