Instructions for use of 45 H.P. "OTTO" Marine Engine


Before attempting to start engine, see that every-
thing is clean,particularly moving parts,working surfaces,etc.

Try Air valves and Exhaust valves by hand,as to their
moving freely.  For lubricating Air valve stem use Engine oil
sparingly,but never supply any oil to the Exhaust valve &
stem,as it will cause sticking of valve and create trouble.
Coal oil only may be used for the purpose of washing away dirt
or carbon sometimes gathering on stem.

Fill oil vessels on both cylinders.  The appartment which
furnishes lubrication to pistons and cylinders with Mineral
oil of a high fire test;the appartment which furnishes lubri-
cation to the different bearings with engine oil.  All inter-
mediate bearings,as well as gear wheels,levers,cams,rollers,
governor spindle and fork must be oiled.  The movable elec-
trodes for electric firing will need occasional lubrication,
as well as cleaning with coal oil.
Just before starting,your attention is called to the drop val-
ves on Oil vessels.  Once adjusted,they should be locked with
the jam nuts and for starting and stopping lubrication open
or close the inside valves only.

Starting Engine

After the above preparations push down the Exhaust poppets
by pulling out and giving 1/4 turn to the small wedge handles
fastened to Exhaust valve casing. Then turn Fly wheel until
Crankshaft is in a horizontal position and see that all roll-
ers are off cams.

Open spindle valves for starting pump on each cylinder-

head and commence to pump. After 10 or 15 strokes with hand
pump permit exhaust poppets to close by turning Wedge handles
to their normal positions and continue pumping. Fill each
cylinder separately with about 15 or 20 strokes,then close
spindle valves again.

See that there is Gasoline in the gasoline valve casing.
If there is none, pump a few strokes with the gasoline pump,
after you have disconnected same to be used by hand. As soon
as you can notice the liquid through the glass in the gasol-
ine valve casing connect the pump again. Turn on the dial of
gasoline valve in Starting Position.

Be sure to have a good spark,and the engine will
start by lifting and snapping off one of the electric ignitor
blades,according to instructuions below.

We will call the Forward Eng #1, the Aft Eng,#2
There are 4 different positions in which the engine can be

1.Crankshaft I Starboard Side
Crankshaft II Port Side

Igniter I releived
Ignitor II in Contact.

In this case snapp off by Hand Igniter I.

2.Crankshaft I Port Side
  Crankshaft II Starboard Side

Igniter I in Contact
Ignitor II releived.

In this case snapp off by Hand Igniter II.

3.Crankshaft I Starboard Side
  Crankshaft II Port Side

Igniter I releived
Ignitor II releived.

In this case snapp off by Hand first Igniter I
and as soon as engine has turned 1/4 of revolution Ign.II

4.Crankshaft I Port Side
  Crankshaft II Starboard Side

Igniter I releived
Ignitor II releived.

In this case snapp off by Hand first Igniter II and
as soon as engine has turned 1/4 revolution Igniter I.

Your attention is called to the timing device for elec-
tric firing. In starting and for the first few revolutions the

ignition ought to act just after the Crank
shaft has passed the upper centre as shown
in Sketch#1.

This takes place when the lever for
adjusting the time of ignition is in the
Starting position,as shownto sketch #2.

After engine is going at speed this adjusting lever,should be
thrown in upright position,to effect earlier firing as shown
in sketch # 3.
After engine is at speed turn Gasoline valve dial to "Run-
ning position."


The engine can be stopped in two different ways.
1st. Close Gasoline valve,which cuts off the Fuel and Spark
at the same time.
2nd. Open the battery switch and as the engine gradually
slows down,the gasoline valve being open,the engine will con-
tinue to receive explosive mixture in the Cylinders,but can-
not ignite it.
Just before engine stops,pull out carefully one of the ver-
tical governor levers,guiding the blades for operating Ex-
haust valves.  By this means you close all valves and keep
them closed until engine stops,having misture in the cylinders
In this case the engine will always stop in one of the 4 men-
tioned positions,ready to be started as above directed with-
out turning fly wheel,pumping or other manipulation. The en-
gine,stopped in this manner,will retain her charge unimpaired
and ready for starting,from 6 to 12 hours.

Setting up Battery & Wire Connections

         Sketch #4
Showing connection of bat-
tery for double cylinder
    Marine Engine

Connect battery the way it is shown in sketch and
use them as follows       (3)

If switching are in position shown in sketch,then

Battery A is for Igniter I

Battery C is for Igniter II

If the Batteries A and C show weakness,through the two swit-

ches over and connect Battery B and D with stopping engine or
any other delay.

Gasoline Starting Valve,Sketch #5

Take out stop a and fill valve to about 1/2" from top,

close it securely.  To regulate the mixture take out

stop b.  By turning adjusting screw down inside,you throttle

the air and get a richer mixture, by turning screw out you

get more air and less gasoline. The screw on the bottom regulates
the gasoline only; screwing it out it is admitted more, in less
gasoline,which means first richer,later weaker mixture.
Once properly adjusted this valve should need no further at-