Service manual

TROUBLESHOOTING
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 1C-19
Engine Acceleration Is Poor
Cause Special Information
Also refer to “Poor Boat Performance”
Idle mixture screws
Incorrect ignition timing
Incorrect distributor or amplifier advance
curve
Refer to SECTION 4B
Accelerator pump
Check for stream of raw fuel from
accelerator pump discharge nozzle, when
opening throttle with engine shut off
Cracked or dirty distributor cap or rotor
Vacuum leak Intake manifold or carburetor base
Spark plugs
Fouled, burned; wrong heat range;
cracked porcelain
Float adjustment
Dirty carburetor
Low compression
Engine Runs Poorly At High RPM
Cause Special Information
Also refer to “Poor Boat Performance”
Crankcase overfilled with oil
Check oil level with boat at rest in the
water.
Anti-siphon valve (if equipped) Restricting fuel supply
Plugged fuel tank vent
Fuel supply
Refer to “Carburetor Malfunctions”
(See “Table of Contents”)
Ignition timing
Low grade of fuel or water in the fuel
Spark plugs
Fouled, burned, cracked porcelain,
incorrect heat range
Spark plug wires Poor insulation, broken wires
Distributor cap or rotor Dirty or cracked
IndexIndex