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Replacing Spark Plugs
Change spark plugs after every 400 operating hours to
assure proper engine performance and reduce exhaust
emission level.
Correct spark plug to use is a Motorcraft–AGSF22C or
AGRF22 or equivalent.
Recommended air gap is .040” (1.016 mm).
Note: The spark plug usually lasts a long time; however,
the plug should be removed and checked whenever the
engine malfunctions.
1. Clean area around spark plugs so foreign matter
cannot fall into cylinder when spark plug is removed.
2. Pull spark plug wires off spark plugs and remove
plugs from cylinder head.
3. Check condition of side electrode, center electrode,
and center electrode insulator to assure there is no dam-
age.
IMPORTANT: A cracked, fouled, dirty or otherwise
malfunctioning spark plug must be replaced. Do not
sand blast, scrape, or clean electrodes by using a
wire brush because grit may eventually release
from the plug and fall into the cylinder. The result is
usually a damaged engine.
4. Set air gap between center and side of electrodes at
.040” (1.016 mm). Install correctly gapped spark plug
and tighten plug to 11–15 ft–lb. If torque wrench is not
used, tighten plug firmly.
5. Install spark plug wires.
Check Governor Oil Level
The governor is shipped with oil in it, but the level of oil
must be checked after every 250 hours of operation.
1. Position machine on level surface and shut engine
off.
2. Disengage hood latch and open the hood.
3. Clean area around check plug on governor.
4. Remove check plug. Oil level must be up to bottom
of filler hole. If oil level is low, remove oil fill plug and add
same oil that is being used in engine. When oil is at point
of overflowing out of check plug hole, install the check
plug and fill plug.
1
Figure 15
1. Oil check plug
Ford Gasoline
Engine
Groundsmaster 3000
Page 3 – 11
Ford VSG–411 Engine