WITTE ENGINE FITTING

Instructions for Installing Either Type BAO or 1922 Bosch
Magneto on Witte, Type ‘W’ Meco and Other Stationary
Engines Made by the Witte Engine Co., of Kansas City, Mo.

The sketch shows you the location of all parts of the fitting
and the table gives you the exact location of the two holes for
carrying the magneto bracket fastening screws. These holes should
be drilled and tapped for ³/₈‘-16 U. S.
Standard thread.

Engines of the types mentioned, having a serial number under
20,000, must have the holes for the magneto bracket fastening
screws drilled and tapped, and require a new cam gear in addition
to the magneto fittings. Be sure to order this gear when you equip
one of the engines, stating the horse-power and number of the
engine.

Engines having serial number from 20,001 to 46,000 require no
changes or mechanical work, other than the drilling and tapping of
the two holes for the magneto bracket fastening screws.

Engines whose serial number is 46,000 and up all have their
engine beds drilled and tapped for the Bosch magneto fittings.

Dimension Schedule

Installation: After mounting the bracket,
remove the governor flywheel and turn engine over until the gears
are meshing with the marked teeth in position as shown in cut so
that you will be absolutely sure of correct mesh and timing when
large gear is replaced. Loosen the nut on the inner end of the gear
shaft and slip the large gear and shaft assembly off. Then remove
the entire battery ignition system, taking off the two pins which
you will find directly to the rear of the shaft of the large
gear.

Put trip rod spring No. 126 in position on the trip rod and
place the end of the trip rod in the guide of the bracket with the
trip yoke No. 121 in position over the boss on the engine bed, thru
which the large gear shaft passes. Adjust the magneto bracket and
trip rod so that the rod works easily back and forth and does not
bind.

Next, replace the large gear making sure that the teeth are
meshed in the proper position with the markings before mentioned.
Put nut on the gear shaft and tighten it. Then mount the magneto on
its bracket. The magneto, bracket and trip rod must be so lined up
that the trip rod does not bind in its guide and the trip finger
hits the trip lever squarely. Roll fly wheel forward until the
large gear is in the position shown in the illustration. The
adjusting nuts on the trip rod should be set so that when the gear
comes to this position, the magneto trips according to the
horse-power size. Put the governor fly-wheel back in place with the
hub against the crank gear and drive the fly-wheel key in
securely.

Set the crank in the position shown for the size engine being
timed, being careful to have it on the compression or firing
stroke. Next, be sure that the trip finger No. 123 is behind the
magneto trip lever, pushing it partly over toward the tripping
point.

Now adjust the entire trip rod with the trip finger and its
carrier toward the magneto trip by unscrewing the nut toward the
cam on the trip rod and screwing on the nut next to the magneto
side of the trip yoke, which operation will move the whole rod and
trip finger toward the magneto. Be careful to see that the trip
finger and its carrier are kept in a vertical position during this
adjustment, so that the tripping edges of the magneto trip lever
and the trip finger are parallel to maintain even wear on both
fingers. Magneto should trip when punch mark on fly-wheel,
‘Igniter Fires,’ is level with top of hopper.

Checking Time of Spark: To check time of spark
and operation of spark plug, unscrew the plug and lay it on the
mixer top, turn the engine over slowly to the tripping point and
observe the spark across the points of the plug. Be sure the spark
points of the plug are the proper distance apart. Correct width of
spark plug gap is from 1/50 to 1/32 of an inch.

Starting Bosch Magneto-Equipped Engines:
Engines fitted with magneto should be started by the back-kick
method only. No starter crank should be used on any size fitted
with oscillating magneto, as these have a fixed spark and no late
spark adjusting lever. The back-kick method is much easier and no
danger is encountered from the back-kick as it would be in using a
starter crank. Proceed as follows: 1st, raise lubricator trip to
feed oil to cylinder; 2nd, hold down on air valve, and turn
flywheel over by hand in direction engine runs until magneto snaps,
then stop. Piston will then be at its inmost position; 3rd, open
fuel throttle, from one to two turns according to size of engine,
and close starting damper about three-fourths. This damper is
located in air heater elbow on kerosene engines, and on outer
flange of mixer on gasoline engines. Prime engine with gasoline
from squirt can thru spring priming valve, inserting end of can
spout in valve and pushing it down as far as it will go. Cold
weather requires more priming than warm weather and a warm engine
less than a cold one; 4th, roll fly-wheel forward quickly until
piston is farthest out with crank below outer center; 5th, now
grasp opposite spokes or rim of fly-wheel. Turn wheel backward
quickly, forcing piston back into cylinder until magneto snaps. The
compressed charge of gas will then be fired by the magneto and
engine driven forward in its regular operation; 6th, open starting
damper and adjust fuel throttle to its proper position, where
engine gives most power on fewest explosions and shows no black
smoke from exhaust.

If Engine Does Not Start First Time, throw it
back against compression once or twice until the magneto trip
snaps, and if it does not start then, shut off the fuel and blow
out old charge by rolling piston back against compression, at the
same time holding inlet valve open with the left hand. Then reprime
and go thru the starting operation again, taking care not to flood
the engine this time.

Magneto Oiling: While running, a light oil
should be used on the yoke roller operated by the cam on the
engine, also on the yoke. Oil the push finger pin, the push rod
guide on the bracket, and the spring ends of the magneto. Oil only
the above points on the magneto operating mechanism. The type BAO
Bosch magneto requires no oil for its bearings. The type 1922 Bosch
magneto requires a couple of drops each time the engine is run.
Do not over oil the 1922 Magneto.

INSTRUCTIONS FOR ORDERING

All fittings and fitting parts must be ordered from the Witte
Engine Works, Kansas City, Mo. The price of the fitting complete is
$7.00 list, and list prices of parts are shown above. These prices
are all F.O.B. Kansas City and subject to 25% discount. Always
state H. P., type and number of engine when ordering parts or
complete fittings.