Yamaha EXCITER 270 Owner's Manual page 95

5
T
ROUBLESHOOTING
TROUBLE
Engine runs
irregularly or
stalls
Engine won't run
over 3,500 rpm
Jet Boat speed
too slow or
loses power
** Engine speed will be limited to 3,500 rpm by the overheat warning device.
POSSIBLE CAUSE
Empty
Stale or
• Fuel
contaminated
Oil and gasoline
mixture is too rich
• Choke Knob is left pulled
Water or dust
• Fuel filter
collected
Fouled or defective
• Spark plug
Incorrect heat range
Gap incorrect
Loose
Loose electrical
• Spark plug cap
connections
Cracked, torn or
damaged
Incorrect idle
Adjustment
• Carburetor
Clogged
Jet intake clogged
• Engine
overheat** Cooling system
clogged
• Cavitation Jet intake clogged
Jet intake clogged
• Engine
Cooling system
overheat**
clogged
• Fuel Filter Clogged
Fouled or defective
• Spark plug
Incorrect heat range
Gap incorrect
• Spark plug caps Loose
Stale or
• Fuel
contaminated
& S
PECIAL
• Refill as soon as possible
• Have serviced at
Yamaha dealer
• Have serviced at
Yamaha dealer
• Push it in fully
• Have serviced at
Yamaha dealer
• Replace
• Replace
• Adjust
• Fit properly
• Tighten or connect properly
• Replace
• Adjust
• Have service at
Yamaha dealer
• Clean
• Clean
• Clean
• Clean
• Clean
• Have serviced at
Yamaha dealer
• Replace
• Replace
• Adjust
• Fit properly
• Have serviced at
Yamaha dealer
5-2
P
ROCEDURES
REMEDY Page
3-3
2-8
4-6
4-6
4-6
4-6
4-6
4-12
5-4
4-1
5-4
5-4
4-1
4-6
4-6
4-6
4-6