Dec. ii, 1909 ] 
FOREST AND STREAM 
945 
Fig. 6.—One drawing is used here to illustrate two kinds c.f installation. Notice no exhaust expansion chamber 
is shown connected to exhaust header of engine. This arrangement is all right when used with a muffler, as 
indicated in drawing. 
tem, proceed as follows: If you use dry cells 
altogether, it is advisable to have two sets, and 
do not use less than five at a time for a single, 
double or triple motor and not less than six 
for a four-cylinder motor. Make a strong box 
that will nicely take the cells, and then pour 
melted paraffine around them, thus securing 
them. The paraffine should fill the box up to 
and just covering the top of the cells. A good 
place to locate the battery box is in the locker 
near the engine. If there is no locker, the box 
should be provided with a cover and the wires 
led out through the sides. If you use a storage 
battery, be sure that it is charged when placed 
m the boat and keep it so at all times. Do not 
allow it to stand any. length of time discharged, 
for to do so will ruin it. Full instructions as 
to the care of a storage battery usually accom¬ 
pany each purchase, and the writer will not at¬ 
tempt to enter into the discussion here, as the 
subject of storage batteries is one of itself and 
admits. of a very extensive treatise. 
Having placed the batteries in the locker or 
other suitable place, proceed to wire up. The 
accompanying diagrams will illustrate the 
methods of wiring the average motor, and they 
are in a large measure self-explanatory. Care 
should be taken in running the primary wire 
from the batteries to the motor and coil, not to 
bind them down simply with staples, but the 
wires should be run on porcelain cleats, and 
care should be exercised to protect them from 
oil and moisture. The secondary wires that 
carry the high tension current should be kept 
free from anything except the spark plug and 
the coil. This cable should be guarded against 
very carefully from being saturated with oil or 
water as very. disastrous results would be 
caused by the high tension current short circuit¬ 
ing. The coil should be placed near the motor, 
so that all connections should be as short as 
possible. Devise some scheme for protecting 
■exceed 
1.. 
Wiring Diagram with Bat¬ 
teries and Magneto for 
Two Cylinders. 
Wiring Diagram with Batteries 
for Three Cylinders. 
Wiring Diagram with Batteries 
and Magneto for 3 Cylinders 
Showing Boat with Engine Installed. 
get the benefit of the vacuum that occurs when 
the pipe is placed at an angle as shown in the 
figure. It must be borne in mind that the en¬ 
gine is not permanently set up to this point, and 
any connections that will tend to bind it should 
not be made fast to the engine until it is lined 
up and bolted down permanently. This last 
operation will take place after the boat is 
launched. In the meantime, however, we may 
proceed with the other branches and get every¬ 
thing ready for the final “connecting up.” All 
holes that are to be bored below the waterline 
should be done now and connection secured to 
them permanently. Do not wait until the boat 
is in the water and then bore them unless you 
are fond of bathing. 
The ignition system will next command our 
attention. 
In case you are to use the jump spark sys- 
Engine with Reverse Gear attached. 
the coil from oil, dust and moisture, all or any 
of which are detrimental to its successful opera¬ 
tion. Most spark coils are adjusted before 
leaving the factory, but in case you are in doubt 
as to the adjustment of the vibrator, the follow¬ 
ing procedure may be resorted to. 
Procure an ammeter that will read to the 
fraction of an ampere and place it in series with 
the coil and battery, then close the circuit. A 
sharp buzzing sound will be heard (provided the 
wiring is correct), and the amount of current 
the coil is taking will be shown by the needle 
of the instrument. Ordinarily, spark coil should 
not draw on the battery to exceed y 2 ampere. 
In case it does, leave the circuit closed and ad¬ 
just the vibrator until the coil draws the proper 
amount of current, then lock the vibrator screw 
in this position. When the coil is once ad¬ 
justed properly, it will require very little atten¬ 
tion and should not be tampered with unless it 
is absolutely necessary to do so. It sometimes 
happens that the platinum points become 
pitted, in whjch case the vibrator may be easily 
removed and the points brought to a good bear¬ 
ing by means of a sharp file or very line emery 
cloth. 
We will take it for granted that the boat is 
now launched, and all that remains to be done 
is the final lining up to the engine with the 
propeller shaft. Bring the faces of the reverse 
gear and propeller shaft close together and in¬ 
sert four strips of paper between them, at 90 
degree increments. Notice if the tension on 
