Mercury V-6 series, User Manual

Page: 93 / 127

91
CA474
Emissions
(Europe Only)
CA399
The following information applies only to engines with a special
emissions kit installed. If the kit has been installed, your engine
complies with “Stage 1” Bodensee and Swiss Regulations.
CA398
Sealed Carburetor Mixture Screws
The carburetor on this engine has seals on the carburetor mixture
screws. These seals prevent adjustment of the fuel mixture settings.
CAUTION
Do not remove mixture screw seals and/or attempt to adjust
fuel mixture setting. Tampering with the mixture setting on
this engine could affect the exhaust emissions level, thus
voiding the emissions certification. These seals should only
be removed by an authorized dealer or emissions testing
agency.
CA99
Changing Positive Crankcase
Ventilation Valve (PCV)
This engine is equipped with a positive crankcase ventilation valve
(PCV). This valve should be changed every 100 hours of operation
or at least once a year, whichever occurs first.
1
Remove PCV valve from port valve cover. Disconnect it from the
hose and discard valve. Install new PCV valve in valve cover and
reconnect hose. Ensure valve is tightly seated in valve cover.
Use only MerCruiser replacement parts to ensure compliance with
emission regulations.