Carburetor Adjustments; Transmission - Indmar 5.7L Vortec Operator's Manual

CARBURETOR ADJUSTMENTS

The carburetor on your engine has been carefully adjust-
ed at the factory and has had sealing caps applied to the
idle mixture screws to prevent further adjustment.
Altering the original factory settings will change the emis-
sions characteristics of your engine and may put your
engine "out of compliance" with the emission standards
in California. If you are experiencing drivability problems
that may be related to the operation of your carburetor,
Indmar suggests that you contact your dealer for assis-
tance. Unauthorized removal of the carburetor sealing
caps may void the warranty on your engine if damage
occurs as a result.
If you have a carbureted engine and live and will always
operate your boat in an area with an altitude greater than
2500 feet above sea level, it may be necessary to have
your carburetor re-jetted to operate properly. It may also
be necessary to reduce your propeller size to allow the
engine to operate at the appropriate RPM. Your boat
dealer is best equipped to help you make these adjust-
ments.
6-14

TRANSMISSION

It is important to keep the water level in the
bilge below the output shaft of the transmis-
sion. If the water level in the bilge is too
high, the coupler can splash water inside the
engine compartment and cause corrosion
problems. High water levels can also allow
water intrusion into the transmission causing
severe damage.
Indmar engines are
equipped with one of
four types of marine
transmissions:
• Midships Mount:
ZF Hurth Marine In-
Line
• Stern Mount:
ZF Hurth Marine
V-Drive
• Stern Mount:
Walters V-Drive and
ZF Hurth In-Line
• Stern Mount:
ZF Hurth Ski-Vee
INDM-A030
Figure 6.11 – ZF Hurth
Transmission Dipstick
(2 on Ski-Vee Models)
Indmar Marine Engines