5-1
TROUBLESHOOTING & SPECIAL PROCEDURES 5
TROUBLESHOOTING
If any trouble happens on your Jet Boat, use this section to check for possible cause. If you can-
not find the cause or if the procedure for replacement or repair is not described in this owner's
manual, ask your Yamaha Jet Boat dealer or qualified mechanic for the proper service.
The Troubleshooting Chart contains
"TROUBLE", "POSSIBLE CAUSE", "REMEDY",
"REFER
PAGE".
Check the possible cause and remedy, and also the referred page for the maintenance steps to
solve the trouble.
TROUBLESHOOTING CHART
TROUBLE POSSIBLE CAUSE REMEDY Page
• Starter motor • Fuse Burned out • Replace the fuse and 4-15
does not turn check wiring
over
• Battery
Run down • Recharge 4-17
Poor terminal
• Tighten as required
4-17
connections
• Jet pump
Not latched • Latch securely
5-5
cleanout hatch
• Starter
Faulty
• Have serviced at
component Yamaha dealer
• Shift lever Not in Neutral • Shift to Neutral 3-15
• Starter motor • Stop switch Lock plate is not • Install lock plate 2-5
turns over/ in place
engine does
• Fuel cock "OFF" position • Turn the fuel cock to "ON" 2-9
not start
• Fuel
Empty • Refill as soon as possible* 3-3
Stale or • Have serviced at
contaminated Yamaha dealer
• Fuel tank
Water or dust • Have service at
collected Yamaha dealer
Built-up pressure
• Open the fuel tank filler
3-14
cap and release pressure
• Spark plug Fouled or defective • Clean or replace 4-7
• Spark plug cap Not fitted or loose • Fit properly 4-7
• Crankcase
Filled with fuel
• Have serviced at
Yamaha Dealer
Filled with water
• Crank engine with
spark plug out until clean
• Fuel filter
Clogged or water • Have serviced at
4-12
collected Yamaha Dealer
• Choke Knob automatically • Tighten the choke cable 4-15
returns tension, adjust nut
* Turn the fuel cock to "RES" (reserve) to return to shore.
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