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Fig. 8

Fig. 7

is in good condition; otherwise use a new gasket. See

Fig. 7, which shows the strainer mounted to the fuel

tank of a power unit. On open engines, the strainer is

mounted to the inlet of the fuel pump.

CARBURETOR ADJUSTMENT

The main metering jet in the carburetor is of the fix-

ed type, that is, it requires no adjustment. The idle

needle should be adjusted for best low speed opera-

tion, while carburetor throttle is closed by hand. For

illustrations and more information, see Carburetor

Manufacturer’s Instruction Bulletin in the back of

this manual.

MAGNETO BREAKER POINT ADJUSTMENT

Magnetos are properly adjusted before leaving fac-

tory. The breeker points on the Fairbanks-Morse mag-

neto and on the Wico magneto should be .0|5" at full

separation. If the spark becomes weak after continued

operation, it may be necessary to readjust these

points. To do this first remove the end cover on the

magneto. The crankshaft should then be rotated with

the starting crank, (this also rotates the magneto),

until the breaker points are wide open. The opening

or gap should then be measured with a feeler gauge

as shown in Fig. 8 and if necessary reset. To readjust

points, first loosen the locking screws on the contact

plate enough so that the plate can be moved. Insert

the end of a small screw driver into the adiusting slot

at the bottom of the contact plate and open or close

the contacts by moving the plate until the proper

opening is obtained. See Fig. 9. After tightening the

locking screws, recheck breaker point gap to make

sure it has not changed. If it is found that the breaker

points have become rough, they should be smoothed

with a breaker point file before the preceding adjust-

ments are made. Replace magneto end cover carefully

MEASURE BREAKER

POINT GAP WHEN~

OPEN. ADJUST TO

.015 INCH

BREAKER ARM-

LOCKING SCREWS

CONTACT PLATE~

ADJUSTING SLOT

OPEN END VIEW OF FAIRBANKS-MORSE MAGNETO

Fig. 9

so that it will seal properly. Do not force cover screws

too tightly otherwise cover may crack. For further in-

formation, see Fairbanks-Morse or Wico Magneto

Maintenance Manual in the back of this manual.

MAGNETO IGNITION SPARK

If difficulty is experienced in starting the engine or

if engine misses firing, the strength of the ignition

spark may be tested by disconnecting the No. 1 igni-

tion cable from the spark plug and holding the ter-

minal about 1/8 inch away from the air shroud or any

other conveniently located metal part of the engine.

If the ignition cables have a molded rubber insulated

spark plug terminal at the end, as illustrated in Fig.

lO, wedge a piece of bare wire up into the terminal

and let one end of the wire extend out. Turn the en-

gine over slowly by the starting crank two complete

revolutions and watch for a strong spark discharge,

which should occur during the cycle at the instant the

impulse coupling on the magneto snaps. Repeat this

check with each of the other ignition cables. If there

is a weak spark, or none at all, check breaker point

opening as mentioned in preceding paragraph under

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