W2-880 Tjd, Thd, Th - Repair - Wisconsin Motors

RECOMMENDED LUBRICATING OILS
Season or Temperature Grade of Oil
Spring, Summer or Autumn
+120°F to 40°F SAE 30
Winter
+40°F to 15°F SAE 20
Below +15°F SAE 10W-30
Use oils classified as Service SE or SF.
Lubricating Oils" chart. The capacity is 3 1/2 quarts, indicated
by a FULL mark on dip stick, see Fig. 4. The combination
oil dip sdck and filler is mounted on the carburetor side of
the engine, but can be located on the starting motor side upon
request.
For run-in of new engines, use same oil as recommended in
"Recommended Lubricating Oils" Chart.
Use only high-grade highly refined oils, corresponding in
body to the S.A.E. (Society of Automotive Engineers) Viscosity
numbers listed in "RecommendedLubricating Oils" Chart.
These will prove economical and assure long engine life.
SERVICE CLASSIFICATION OF OIL
In addition to the S.A.E. Viscosity grades, oils are
also classified according to severity of engine service.
Use oils classified by the American Petroleum
Institute as Service SE, SF or SG. This type of oil is
for engines performing under unfavorable or severe
operating ,conditions such as: high speeds, constant
starting and stopping, operating in extreme high or
low temperatures and excessive idling.
Follow summer recommendations in winter if engine
is housed in warm building.
Check oil level
every 8 hours of operation,
The old oil should be drained and hesh oil
added after every 50 hours of operation.
To drain oil; remove drain plug at either side of crankcase
base. Oil should be drained while engine is hot,
as it will then flow more freely.
FUEL
These engines can be furnished with either a gravity
feed tank mounted above the carburetor fuel level, a
side mount tank, or tank mounted below the engine.
In the latter two cases, a fuel pump is furnished.
The fuel tank should be filled with a good quality
gasoline free from dirt and water. Some of the poorer
grades of gasoline contain gum which will deposit on
valve stems, piston rings, and in the various small
passages in the carburetor, causing trouble in operating,
and in fact might prevent the engine from operating
at all.
Use only reputable, well known brands of gasoline
of the REGULAR GRADE.
The gasoline should have an octane rating of at least
90. Fuel with a low octane rating will cause detonatic.n,
and if operation is continued under this condition,
severe damage will result to the engine. The
cylinders and pistons will score, head gasket blow
out, bearings will be damaged, etc.
Be sure that air vent in fuel tank cap is not plugged
with dirt, as this would impede the flow of gasoline.
FUEL PUMP and PRIMING (Fig. 5)
The diaphragm type fuel pump, furnished on engines
with side mount or underslung fuel tanks, is actuated
by an eccentric on the camshaft, as illustrated in
cross section of engine, Fig. 3. For maintenance and
repair, refer to fuel pump instructions in rear section
of manual.
Hand Primer for hand crank engine is an accessory
furnished only upon request, and is a necessary function
when starting a new engine for the first time, or
when engine has been out of operation for a period of
time. Gravity feed and electric start engines do not
require hand priming.
When priming, a distinct resistance of the fuel pump
diaphragm should be felt when moving the hand lever
up and down. If this does not occur, the engine should
be turned over one revolution so that the fuel pump
drive cam will be rotated from its upper position which
prevents movement of the pump rocker arm.
Fig. 5
Assuming the gasoline strainer is empty, approximately
25 strokes of the primer lever are required to fill
the bowl. See Fig. 5. After strainer bowl is full, an
additional 5 to 10 strokes are required to fill the
carburetor bowl. When carburetor is full the hand
primer lever will move more easily.
IGNITION SWITCH
Magneto ignition is standard on these engines. A lever type
switch, on the side of the magneto, is always in the on or
running position, except when depressed for stopping the
engine. See Fig. 1 and Fig. 2A.
On engines with a house, the ignition switch is on the outside
of the house at the flywheel end. See Fig. 2. When starting or
stopping engine, follow insta’uctions on switch tag. This will
apply to both magneto and battery ignition.