Troubleshooting - Rotax 125 MAX Installation Instructions And Operators Manual

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10) Troubleshooting

Trouble
Electric starter does not run
when pressing start button
Starter reduction gear rotates
but doesn't engage
Engine won't start
Engine does not idle properly
and stops running
engine performance drops at
approximately 7000 rpm
(125 MAX ONLY)
Engine shows performance
loss
Effectivity: 125 MAX/Junior MAX/Mini MAX/Micro MAX
Edition 1/Rev. 0
Possible fault
Wrong connected wiring
Wiring harness damaged
Battery not connected
Inadequately charged battery
Starter reduction gear dirty
ON/OFF switch not actuated
Inadequately charged battery
Faulty spark plug
Not enough fuel in fuel tank
No fuel supply to carburetor
Fuel filter clogged
Wiring harness damaged
Lost compression
Bad idling adjustment of carbu-
retor
Bad mixture preparation ad-
justment at idling
Incorrect setting of the exhaust
valve timing
Carbon deposits on the ex-
haust valve
Bad compression
Jetting of the carburetor is too
lean
Insufficient fuel supply to the
carburetor
Fuel filter in carburetor clogged Clean fuel filter, see section
BRP-Powertrain
Remedy
Verify connection, see installa-
tion instructions section
Renew wiring harness
Verify battery connection
Exchange or charge battery,
see section
3.2)
Clean starter reduction gear
Actuate ON/OFF switch, see
section
5.1)
Exchange or charge battery,
see section
3.2)
renew spark plug
Replenish fuel, see section
3.3)
Verify connections on fuel
pump, see installation instruc-
tions chapter
8)
Clean fuel filter, see section
4.1)
(step 8 to 10)
Renew wiring harness
Have a tear-down inspection
conducted by an authorized
distributor
Adjust the idle speed, see sec.
4.1)
Adjust mixture preparation at
idling, see section
4.1)
Adjust the exhaust valve tim-
ing, see chapter
6)
Clean the exhaust valve
Have a tear-down inspection
conducted by an authorized
distributor
Optimize carburetor jetting,
see section
4.1)
Check the fuel supply to the
carburetor
4.1)
(step 8 to 10)
page 2-39
February 01/2014
5.2)

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