TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Page 1C-13
90-861326--1 MARCH 1999
Poor Fuel Economy
Cause Special Information
Fuel leaks
Operator habits
Prolonged idling; slow acceleration; failure
to cut back on throttle once boat is on
plane; boat overloaded; uneven weight
distribution
Engine laboring
Bent, damaged, or wrong propeller. Water
test boat for proper operating rpm at wide-
open-throttle
Clogged flame arrestor
Engine compartment sealed too tight Not enough air for engine to run properly
Boat bottom Dirty (marine growth), hook, rocker
Improper fuel
Crankcase ventilation system not working
Engine running too cold or too hot
Plugged or restricted exhaust
Engine Low compression
Engine Runs Poorly at Idle
Symptoms Cause
Engine surges
Low top speed or lack of power
Refer to “Fuel Injection Troubleshooting,”
Poor cold engine operation
SECTION 5D
Engine stalls
Hard starting Refer to “Engine Starts Hard”
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