899883192 - Valiant
899883192 - Valiant
899883192 - Valiant
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Engine Will Not Start or Is Hard to Start<br />
Section 7 - Troubleshooting<br />
Possible Cause<br />
Lanyard stop switch activated.<br />
Improper starting procedure.<br />
Insufficient fuel supply.<br />
Faulty ignition system component.<br />
Clogged fuel filter.<br />
Stale or contaminated fuel.<br />
Fuel line or tank vent line kinked or clogged.<br />
Faulty wire connections.<br />
EFI system fault.<br />
Engine Runs Rough, Misses, or Backfires<br />
Poor Performance<br />
Clogged fuel filter.<br />
Possible Cause<br />
Stale or contaminated fuel.<br />
Kinked or clogged fuel line or fuel tank vent line.<br />
Flame Arrestor dirty.<br />
Faulty ignition system component.<br />
Idle speed too low.<br />
EFI System fault.<br />
Check the lanyard stop switch.<br />
Read the starting procedure.<br />
Fill fuel tank or open valve.<br />
Service the ignition system.<br />
Replace fuel filter.<br />
Remedy<br />
Drain fuel tank. Fill with fresh fuel.<br />
Replace kinked lines or blow out lines with compressed air to<br />
remove obstruction.<br />
Check wire connections.<br />
Have EFI System checked by an authorized Mercury<br />
MerCruiser dealer.<br />
Replace filter.<br />
Remedy<br />
If contaminated, drain tank. Fill with fresh fuel.<br />
Replace kinked lines or blow out lines with compressed air<br />
to remove obstruction.<br />
Clean Flame Arrestor.<br />
Service ignition system.<br />
Have EFI system checked by an authorized Mercury<br />
MerCruiser dealer.<br />
Have EFI System checked by an authorized Mercury<br />
MerCruiser dealer.<br />
Possible Cause<br />
Throttle not fully open.<br />
Damaged or improper propeller.<br />
Excessive bilge water.<br />
Boat overloaded or load improperly<br />
distributed.<br />
Flame arrestor dirty.<br />
Boat bottom fouled or damaged.<br />
Ignition problem.<br />
Engine overheating.<br />
EFI System fault<br />
Remedy<br />
Inspect the throttle cable and linkages for proper operation.<br />
Replace the propeller.<br />
Drain and check for cause of entry.<br />
Reduce load or redistribute load more evenly.<br />
Clean the flame arrestor.<br />
Clean or repair as necessary.<br />
See Engine Runs Rough, Misses or Backfires.<br />
See Excessive Engine Temperature.<br />
Have EFI System checked by an authorized Mercury MerCruiser<br />
dealer.<br />
Excessive Engine Temperature<br />
Possible Cause<br />
Water inlet or seacock closed.<br />
Drive belt loose or in poor condition.<br />
Open.<br />
Replace or adjust belt.<br />
Remedy<br />
90-<strong>899883192</strong> NOVEMBER 2008 Page 105