Mariner Mercury 105/140 JET, Руководство по обслуживанию

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3D-14 - FUEL SYSTEMS 90-824052R3 JUNE 2002
Preliminary Checks
Ignition Spark Check
Purpose: This test determines if the ignition system
is delivering usable spark to the spark plugs.
By performing this test, the probable cause
can be isolated to either the ignition system or
fuel system.
1. Disconnect all spark plug wires from spark plugs.
2. Connect spark gap tester Quicksilver
(91-63998A1) to No. 1 spark plug wire and to
good ground on engine.
3. Connect Remote Starter Switch Quicksilver
(91-52024A1).
a. Connect RED lead from switch to large
positive (+) terminal with RED banded cable
attached [(+) cable from battery].
b. Connect BLACK lead from switch to small
terminal with YELLOW/RED lead attached.
4. Turn ignition key switch to the “ON” position.
OFF
ON
START
5. Turn over engine using remote starter.
6. Look at spark gap tester viewing port for
presence of good quality spark. Complete steps
1 through 6 on each spark plug.
Results: IMPORTANT: The presence of a good
spark will not necessarily indicate condi-
tion of timing. Ignition timing may be off
far enough to prevent the engine from
starting, but still allow a good spark to be
present in the spark gap tester.
A steady, blue spark should be present at each spark
plug wire. If a good spark is present, problem may not
be ignition related. If good spark is not present,
problem may be ignition related. Trouble shoot
ignition system or make sure engine timing is set
correctly. Refer to appropriate ignition section in this
service manual.
Ignition system failure (switch box, stator, trigger,
etc.) can cause fuel delivery problems. Injectors are
triggered in pairs by one, three, five primary circuits
(inner switch box).
No. 1 Primary Triggers No. 3 & 4 Injectors
No. 3 Primary Triggers No. 5 & 6 Injectors
No. 5 Primary Triggers No. 1 & 2 Injectors
Failure in one or more of these primary circuits will
cause no spark and no fuel to respective cylinders
(above). Check spark and spark plugs on all
cylinders before attempting EFI tests.
Electronic Fuel Injection Set Up
IMPORTANT: Follow EFI Timing/Synchronizing/
Adjustment section 2C before attempting tests
on EFI system.
55174
EFI set up procedures must be followed before tests
on system are performed (refer to Section 2C).
Improper set up can result in poor engine
performance (i.e. uncontrollable idle speeds, lean
sneezing, low power during acceleration or engine
will simply not run.) Failure to properly set up the EFI
system can lead to misdirections in solving simple
problems in the EFI system.