Johnson J30MLSRC User Manual

Carburetor
The carburetor meters and distributes the fuel to
the engine.
It controls engine speed and power
output by varying the intake charge density.
To
react correctly to a wide range of operating condi-
tions. the carburetor has
multiple fuel mixing cir-
cuits.
Fuel mixture enrichment for cold starting is con-
trolled by either a choke (9.9/15 Models). a man-
ual primer (25 TE and 25/30 R Models). or a fuel
primer solenoid (Remote Electric Models).
IMPORTANT: The 9.9/15 models use a tamper
resistant carburetor. Changing
original factory fuel
mixture calibrations beyond the limits allowed by
the tamper resistant device
is a violation of federal
law. Any carburetor adjustments beyond preset
limits become the responsibilty of the servicing
technician and/or the owner. Refer to
Emissions
Compliance on p. 150.
Intake Manifold
FUEL SYSTEM
COMPONENTS
The intake manifold provides the mounting sur-
faces to adapt the carburetor
to the cylin-
der/crankcase assembly. It contains the leaf
valves
which control the intake charge to each cy l-
inder.
1
TYPICAL
1. Intake manifold
CO A 1524 .
m WARNING m
After servicing the fuel system, check for
leaks. Failure to check for fuel leakage
could allow a leak to go undetected,
resulting in fire or explosion.
141

Johnson J30MLSRC Specifications

General

Brand	Johnson
Model	J30MLSRC
Category	Outboard Motor
Language	English