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General Information
Emissions Information
For emissions information, see the OEM engine manual.
Engine Oil Recommendations
Genuine Generac parts are recommended for all
maintenance items.
All Generac oil kits meet minimum American Petroleum
Institute (API) Service Class CJ-4/SM. Select the
appropriate viscosity oil grade according to the expected
operating temperature. Synthetic oil also can be used in
the appropriate weight as standard, once the engine has
been broken in. Once synthetic oil is used, it should be
used for the life of the unit. It is not recommended to go
back to a mineral oil. Do not use special additives.
See
Specifications
for engine oil capacity.
Figure 2-11. MFH900 Engine Oil Viscosity
NOTE: For temperatures below -4 °F (-20 °C), use SAE
5W-30.
For more information, see the engine manual.
Coolant Recommendation
DANGER
Risk of poisoning. Do not use mouth to siphon
coolant. Doing so will result in death or serious
injury.
Where the atmospheric temperature falls below freezing,
the cooling system should be drained after engine
operation. To eliminate the need for repeated draining
and refilling, the use of a 50/50 Ethylene glycol base
antifreeze/water mix is recommended. Never exceed a
14
60/40 antifreeze/water mix.
NOTE: Recommended coolant is ZEREX™ Nitrate Free
Extended Life Antifreeze/Coolant.
Freezing Point °F (°C)
Coolant (% Volume)
Water (% Volume)
See
Specifications
For more information, see the engine manual.
Fuel System
Explosion and Fire. Fuel and vapors are
extremely flammable and explosive. Keep fire
and spark away. Failure to do so will result
in death or serious injury.
Explosion and Fire. Do not overfill fuel tank.
Overfilling may cause fuel to leak and ignite
or explode, resulting in death or serious injury.
The heater is designed to operate with diesel fuel.
See
Specifications
IMPORTANT NOTE: Comply with all laws regulating
the storage and handling of fuels.
Follow these guidelines:
Use only ultra-low-sulfur diesel fuel.
•
000000
When temperatures are at or below freezing, use
•
No. 1D diesel fuel.
When temperatures are above freezing, use No.
•
2D diesel fuel.
In some areas of the country, climatized fuel—a
•
mixture of 1D and 2D, may also be used.
(000149)
3
-13
-31
-58
(-16)
(-25)
(-35)
(-50)
30
40
50
60
70
60
50
40
for coolant capacity.
DANGER
DANGER
for fuel tank capacity.
Owner's Manual for Flameless Air Heater
(000168)
(000204)
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