Section 05
ENGINE MANAGEMENT (DI)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
05-03-32
SMR2000-051-05-03A.FM
If wiring harness tests good, it could be the
MPEM. Try a new MPEM referring to MPEM re-
placement procedures elsewhere in this section.
Safety Lanyard Switch Verification
If 2 short beeps are not heard when installing the
safety lanyard, refer to DIAGNOSTIC PROCE-
DURES.
The following continuity tests can also be per-
formed using an ohmmeter:
Disconnect switch wires.
Safety Lanyard Removed
Connect test probes to switch BLACK and BLACK/
YELLOW wires. Measure resistance, there should
be NO continuity (open circuit).
Connect one test probe to the WHITE/GRAY wire
and the other test probe to the switch terminal.
Measure resistance, it must be close to 0 ohm.
Connect one test probe to the BLACK wire and the
other test probe to the switch ring. Measure resis-
tance, it must be close to 0 ohm.
Safety Lanyard on Switch
Connect test probes to switch BLACK and BLACK/
YELLOW wires. Measure resistance, it must be
close to 0 ohm.
SPARK PLUGS
Disassembly
First unscrew the spark plug one turn.
Clean the spark plug and cylinder head with pres-
surize air then completely unscrew.
Heat Range
The proper heat range of the spark plugs is deter-
mined by the spark plugs ability to dissipate the
heat generated by combustion.
The longer the heat path between the electrode
tip to the plug shell, the hotter the spark plug op-
erating temperature will be — and conversely, the
shorter the heat path, the colder the operating
temperature will be.
A “cold” type plug has a relatively short insulator
nose and transfers heat very rapidly into the cylin-
der head.
Such a plug is used in heavy duty or continuous
high speed operation to avoid overheating.
The “hot” type plug has a longer insulator nose
and transfers heat more slowly away from its firing
end. It runs hotter and burns off combustion de-
posits which might tend to foul the plug during
prolonged idle or low speed operation.
1. Cold
2. Hot
CAUTION:
Severe engine damage might occur
if a wrong heat range plug is used.
A too “hot” plug will result in overheating and pre-
ignition, etc.
A too “cold” plug will result in fouling or may cre-
ate carbon build up which can heat up red-hot and
cause pre-ignition or detonation.
Fouling
Fouling of the spark plug is indicated by irregular
running of the engine, decreased engine speed
due to misfiring, reduced performance, and in-
creased fuel consumption. This is due to a loss of
compression. Other possible causes are: pro-
longed idling, or running on a too rich mixture or
incorrect fuel. The plug face of a fouled spark plug
has either a dry coating of soot or an oily, glossy
coating given by an excess either of oil or of oil
with soot. Such coatings form a conductive con-
nection between the center electrode and ground.
Spark Plug Installation
Prior to installation make sure that contact surfac-
es of the cylinder head and spark plug are free of
grime.
1. Using a wire feeler gauge, set electrode gap ac-
cording to the following chart.
2. Apply anti-seize lubricant over the spark plug
threads to prevent possible seizure.
A00E09A
1
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Summary of Contents for 2001 RX
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Page 2: ...2000 Shop Manual VOLUME 2 RX RX DI GTX DI www SeaDooManuals net ...
Page 345: ...SMR2000 073_14_00A FM RX MODEL 5513 5514 www SeaDooManuals net ...
Page 346: ...SMR2000 073_14_00A FM F16Z01 www SeaDooManuals net ...
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Page 348: ...SMR2000 073_14_00A FM F12Z02 www SeaDooManuals net ...
Page 349: ...SMR2000 073_14_00A FM GTX DI MODEL 5649 5659 www SeaDooManuals net ...
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