5-2
5
T
ROUBLE
R
ECOVERY
TROUBLE
POSSIBLE
CAUSE
REMEDY
PAGE
Engine runs
irregularly or
stalls
• Fuel
Empty
• Refill as soon as possible
3-1
Stale or
contaminated
• Have serviced at
Yamaha dealer
• Fuel filter
Water or dust
collected
• Have serviced at
Yamaha dealer
• Spark plug
Fouled or defective
• Have serviced at
Yamaha dealer
Incorrect heat range
• Have serviced at
Yamaha dealer
Gap incorrect
• Have serviced at
Yamaha dealer
• Spark plug cap
Loose
• Have serviced at
Yamaha dealer
Loose electrical
connections
• Have serviced at
Yamaha dealer
Cracked, torn or
damaged
• Have serviced at
Yamaha dealer
Engine won’t run
over 3,000 rpm
• Engine
overheat**
Jet intake clogged
• Clean
5-5
Cooling system
clogged
• Clean
4-1
Boat speed
too slow or
loses power
• Cavitation
Jet intake clogged
• Clean
5-5
• Engine
overheat**
Jet intake clogged
• Clean
5-5
Cooling system
clogged
• Clean
4-1
• Fuel Filter
Clogged
• Have serviced at
Yamaha dealer
• Spark plug
Fouled or defective
• Have serviced at
Yamaha dealer
Incorrect heat range
• Have serviced at
Yamaha dealer
Gap incorrect
• Have serviced at
Yamaha dealer
• Spark plug caps
Loose
• Have serviced at
Yamaha dealer
• Fuel
Stale or
contaminated
• Have serviced at
Yamaha dealer
** Engine speed will be limited to 3,500 rpm by the overheat warning device.