Kubota DG972 E2, Applications Manual, Page: 34 / 93

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4. HIGH ALTITUDE OPERATION (WG752, WG972)
IMPORTANT
• Altitude compensation kit is applied for EPA and CARB certified engines only.
EPA and CARB emission regulations require the ultimate users of non-road SI engine, as their obligation,
to adjust the emissions by installing the appropriate genuine altitude compensation kit. And the engine
manufacturer must provide such kit when the engine is operated at an altitude that exceeds the standard
level, as guaranteed by the engine manufacturer.
For this purpose, Kubota prepared genuine altitude compensation kit described below.
The ultimate users of SI engines must comply with the regulations through the installation of the
appropriate altitude compensation kit for the altitude range where the engine will be operated.
* Prepare for the users who have lost original carburetor’s jet.
Altitude compensation kit part number: Please contact your local Kubota dealer and specify your engine type and
engine serial No. Please consult your local Kubota dealer for further information on the altitude compensation kit.
CONSULT YOUR LOCAL KUBOTA DEALER FOR FURTHER INFORMATION ON THIS PROCEDURE.
Refer Exchange Manual (EG601-9939 ∆ )
NOTE
• At high altitude the carburetor air-fuel mixture will be too rich, so a high altitude carburetor kit should be
used.
• Please note however that even with the high altitude kit, engine horsepower will be reduced by
approximately 3.5 % for every 300 meter increase in altitude.