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Maintenance Instructions
IMPORTANT TIPS FOR CARE OF THE YANMAR
ENGINE
Fuel System
•
Fuel must be clean--free from water, dirt and or-
ganic material. Fuel contamination will greatly short-
en the life of the fuel injector pump and injectors.
•
Use of (B5) Bio-Diesel fuel is approved when pur-
chased from recognized and authorized diesel fuel
supplier.
•
Engine is equipped with a mechanical fuel pump
and the fuel system will need to be primed in certain
conditions (after running out of fuel or after fuel sys-
tem maintenance). Move priming lever on fuel pump
until the clear cup on the fuel filter/water separator
shows filled with fuel before attempting to crank the
engine.
•
DO NOT crank the engine to prime the fuel system
as this may damage the starter from prolonged
cranking.
•
DO NOT open the air vent valve or loosen fuel
lines on the injector pump to bleed the fuel system.
The fuel filter has an internal air bleed port connected
to the fuel return line to the fuel tank.
Starting/Stopping
•
DO NOT use ether or any starting fluid in the air
intake. This will damage the engine.
•
To aid starting in cold weather (below 40° F (4° C)),
release the hydrostatic transmission drive belt to re-
duce the engine starter cranking load. Reinstall belt
after the engine has been warmed up.
•
Start the engine with the throttle advanced off idle
to a mid-point (1/4 to 1/2) throttle setting. This will aid
starting, especially in cold weather.
•
Keep the battery fully charged.
•
Match crankcase oil viscosity to the ambient tem-
perature, allowing the engine to crank faster and start
easier.
•
For maximum engine life, allow the engine to run
at idle and cool down for one or two minutes before
stopping the engine.
Cooling System
•
Fill the cooling system with a pre-mixed solution of
50/50 antifreeze (ethylene glycol) and distilled water.
IMPORTANT: Solution must be pre-mixed before
putting it in the engine (adding pure antifreeze into the
radiator may cause damage to the engine by causing
overheating).
42
•
Never mix different types/colors of coolants.
•
Maintain proper fluid levels in the radiator and
overflow tank.
Air Cleaner System
•
Use only Enginaire™ air cleaner elements.
Aftermarket elements may not seal in the air cleaner
housing, allowing dirt to enter the engine. Also,
aftermarket filters often skimp on the filtration media
and require more frequent cleaning and replacement
(see following instructions).
•
Use the air filter restriction gauge to indicate the
need to service the air filter.
•
DO NOT overservice or frequently "disturb"
the air filter. A dirty air filter actually cleans better
than a new one. Changing and cleaning the air filter
too often can actually reduce filter efficiency and in-
crease the opportunity for traces of dust to enter the
engine. Wait until the element really needs servicing
as indicated by the air filter restriction gauge.
•
Do frequently check the Turbine Precleaner
(located in the end cap of the air cleaner assembly)
for free movement of the internal fan. Shine light into
end cap to verify movement of fan with engine
running.
•
When the air filter element is removed or replaced,
make sure all dust is cleaned out of the air cleaner
housing and hose. Use a damp cloth and wipe the
interior of the canister and hose clean (a little dirt left
here will be sucked into the engine and reduce en-
gine life). When the filter is reinstalled, make sure the
element is held tight and straight in the canister for
proper seating and sealing.
•
Periodically check the air intake hose for cuts,
nicks, etc., and the hose clamps for tightness.
Oil
•
Use any top quality oil with an API classification of
CD or greater. DO NOT use oil that is rated for gaso-
line engines only (API SE/SF) as this will cause prob-
lems with a diesel engine.
•
Single viscosity or multi-viscosity oils may be used
as specified by the Yanmar Operation Manual, using
the viscosity recommended to match ambient tem-
perature range for the engine operation. This will aid
starting in cold weather and assure proper lubrica-
tion in hot weather.
•
Use only Yanmar oil filters. Aftermarket filters
may not seal properly and/or have the incorrect
pressure relief valve for proper lubrication.
YANMAR TIPS
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