TROUBLESHOOTING
SUMMARY OF TROUBLESHOOTING
FOR OVERHEATING
This watercraft controls the engine as follows, in the
event it overheats.
• If the cooling water temperature is above 85°C
(185°F), the engine control module (ECM) will
limit the engine speed to 3,000 rpm to prevent
engine damage. If the engine coolant temperature
(ECT) sensor detects a water temperature
above 95°C (203°F), the engine will shut off (failure
code #47).
• If the manifold surface temperature switch
detects the engine is overheating, the ECM will
shut off the engine (failure code #46).
If there are failure codes in the system, first diagnose
the PGM-FI system (page 8-10).
BEFORE BEGINNING
TROUBLESHOOTING
Ask the user about the following condition:
1. Check whether the intake grate (water intake
area) had been clogged (page 4-15).
(Temporary failure if it had been clogged)
2. Ask which of the following symptoms appeared
when the engine overheated.
– The warning buzzer sounded and the engine
stopped immediately (page 7-5).
– The warning buzzer sounded and the engine
speed did not rise above approx. 3,000 rpm
(page 7-6).
– The warning buzzer sounded and the engine
speed did not rise above approx. 3,000 rpm,
then the engine stopped (page 7-8).
THE WARNING BUZZER SOUNDED AND THE
ENGINE STOPPED IMMEDIATELY (EXHAUST
COOLING SYSTEM)
1. Cooling water filter
Remove the jet nozzle (page 14-8) and check the
water filter.
Is the water filter clogged?
YES – Clean the water filter.
NO – GO TO STEP 2.
2. Cooling water hose damage check
Remove the side panels (page 3-5).
Flush the system (page 5-2).
Is there any damage in the water hoses or is the
water hose disconnected?
YES – Repair the damage.
NO – GO TO STEP 3.
WATER FILTER
COOLING SYSTEM
7-6
3. Pilot water nozzle (flushing check)
Flush the system and check the pilot water hole
(page 4-15).
Is the water running from the water nozzle?
NO – The system is clogged between the oneway
valve and exhaust manifold.
YES – GO TO STEP 4.
4. Pilot water nozzle (check with the watercraft in
the water)
Start the engine on the water.
Is the water running from the water nozzle?
NO – The system is clogged or the water hose
is disconnected between the jet pump
and one-way valve.
YES – GO TO STEP 5.
5. Test-run
Test run the watercraft in the water.
Does the engine stop as soon as the warning
buzzer sounds?
YES – GO TO STEP 6.
NO – GO TO STEP 7.
6. One-way valve
Check the one-way valve (page 7-9).
Is the one-way valve normal?
NO – Replace the one-way valve.
YES – GO TO STEP 7.
7. Cooling water passage (inlet section)
Check for clogs between the jet pump and oneway
valve.
Is the system clogged between the jet pump
and one-way valve?
NO – Clean or replace the faulty part.
YES – Check the engine cooling system (page
7-6).
THE WARNING BUZZER SOUNDED AND THE
ENGINE SPEED DID NOT RISE ABOVE APPROX.
3,000 rpm (ENGINE COOLING SYSTEM)
1. Cooling water filter
Remove the jet nozzle (page 14-8) and check the
water filter.
Is the water filter clogged?
YES – Clean the water filter.
NO – GO TO STEP 2.
WATER FILTER
COOLING SYSTEM
7-7
2. Cooling water hose damage check
Remove the side panels (page 3-5).
Flush the system (page 5-2).
Is there any damage in the water hoses or is the
water hose disconnected?
YES – Repair the damage.
NO – GO TO STEP 3.
3. Pilot water nozzle (flushing check)
Flush the system and check the pilot water hole
(page 4-15).
Is water running from the water nozzle?
NO – • ARX1200T3/T3D: GO TO STEP 4.
• ARX1200N3: GO TO STEP 5.
YES – GO TO STEP 6.
4. Check for clogs in the engine cooling system
(ARX1200T3/T3D)
Disconnect the water hose of the inlet side of the
intercooler.
Connect a garden hose to the water outlet joint
and turn on the water.
Is the water spraying forcibly out from the
water hose?
YES – The water passage in the engine is
clogged.
NO – GO TO STEP 6.
5. Check for clogs in the engine cooling system
(ARX1200N3)
Disconnect the water hose of the inlet side of the
exhaust manifold.
Connect a garden hose to the water outlet joint
and turn on the water.
Is the water spraying forcibly out from the
water hose?
YES – The water passage in the engine is
clogged.
NO – GO TO STEP 6.
6. One-way valve
Check the one-way valve (page 7-9).
Is the one-way valve normal?
NO – Replace the one-way valve.
YES – GO TO STEP 7.
7. Cooling water passage (inlet section)
Check for clogs between the jet pump and oneway
valve.
Is the system clogged between the jet pump
and one-way valve?
NO – Clean or replace the faulty part.
YES – Check the exhaust cooling system (page
7-5).
THE WARNING BUZZER SOUNDED AND THE
ENGINE SPEED DID NOT RISE ABOVE APPROX.
3,000 rpm, THEN THE ENGINE STOPPED
1. Cooling water filter
Remove the jet nozzle (page 14-8) and check the
water filter.
Is the water filter clogged?
YES – Clean the water filter.
NO – GO TO STEP 2.
2. Engine cooling system check
Perform the engine cooling system check (page
7-6).
Is the system normal?
YES – Correct the faulty part.
NO – GO TO STEP 3.
3. Exhaust cooling system check
Perform the exhaust cooling system check (page
7-5).
Is the system normal?
NO – Correct the faulty part
WATER FILTER
COOLING SYSTEM
7-9
ONE-WAY VALVE CHECK
Remove the left side panel (page 3-5).
Remove the band and disconnect the water hoses
from the one-way valve to remove it.
Shake the one-way valve. It should make a clicking
or rattling sound.
Apply pressurized water to the inlet port of the oneway
valve. Water should flow through the one-way
valve and out the outlet ports that goes to the
engine and exhaust system.
Apply pressurized water to the outlet ports. Water
should not flow from the inlet port.