899883192 - Valiant

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Section 7 - Troubleshooting Diagnosing EFI Problems Your authorized Mercury MerCruiser dealer has the proper service tools for diagnosing problems on Electronic Fuel Injection (EFI) Systems. The Electronic Control Module (ECM) on these engines has the ability to detect some problems with the system when they occur, and store a Trouble Code in the ECM's memory. This code can then be read later by a service technician using a special diagnostic tool. Diagnosing DTS Problems Your authorized Mercury MerCruiser dealer has the proper service tools for diagnosing problems on Digital Throttle and Shift (DTS) Systems. The Electronic Control Module (ECM)/Propulsion Control Module (PCM) on these engines has the ability to detect some problems with the system when they occur, and store a Trouble Code in the ECM/PCM's memory. This code can then be read later by a service technician using a special diagnostic tool. Engine Guardian System The Engine Guardian System monitors the critical sensors on the engine for any early indications of problems. The system will respond to a problem by emitting a continuous beep and/or reducing engine power in order to provide engine protection. If Guardian System has been activated, reduce throttle speed. The horn will turn off when throttle speed is within the allowable limit. Consult an authorized Mercury MerCruiser dealer for assistance. Troubleshooting Charts Starter Motor Will Not Crank Engine, or Cranks Slowly Battery switch turned off. Possible Cause Remote control not in neutral position. Open circuit breaker or fuse. Loose or dirty electrical connections or damaged wiring. Bad battery or low battery voltage. Lanyard stop switch activated. Turn the switch on. Remedy Position the control lever in neutral. Check and reset the main power circuit breaker or replace the fuse. Check the 5 amp fuse on the power harness connected to the battery, and replace if necessary. Check all electrical connections and wires (especially battery cables). Clean and tighten all faulty connections. Test the battery and charge if necessary; replace if bad. Check the lanyard stop switch. Page 104 90-<strong>899883192</strong> NOVEMBER 2008
Engine Will Not Start or Is Hard to Start Section 7 - Troubleshooting Possible Cause Lanyard stop switch activated. Improper starting procedure. Insufficient fuel supply. Faulty ignition system component. Clogged fuel filter. Stale or contaminated fuel. Fuel line or tank vent line kinked or clogged. Faulty wire connections. EFI system fault. Engine Runs Rough, Misses, or Backfires Poor Performance Clogged fuel filter. Possible Cause Stale or contaminated fuel. Kinked or clogged fuel line or fuel tank vent line. Flame Arrestor dirty. Faulty ignition system component. Idle speed too low. EFI System fault. Check the lanyard stop switch. Read the starting procedure. Fill fuel tank or open valve. Service the ignition system. Replace fuel filter. Remedy Drain fuel tank. Fill with fresh fuel. Replace kinked lines or blow out lines with compressed air to remove obstruction. Check wire connections. Have EFI System checked by an authorized Mercury MerCruiser dealer. Replace filter. Remedy If contaminated, drain tank. Fill with fresh fuel. Replace kinked lines or blow out lines with compressed air to remove obstruction. Clean Flame Arrestor. Service ignition system. Have EFI system checked by an authorized Mercury MerCruiser dealer. Have EFI System checked by an authorized Mercury MerCruiser dealer. Possible Cause Throttle not fully open. Damaged or improper propeller. Excessive bilge water. Boat overloaded or load improperly distributed. Flame arrestor dirty. Boat bottom fouled or damaged. Ignition problem. Engine overheating. EFI System fault Remedy Inspect the throttle cable and linkages for proper operation. Replace the propeller. Drain and check for cause of entry. Reduce load or redistribute load more evenly. Clean the flame arrestor. Clean or repair as necessary. See Engine Runs Rough, Misses or Backfires. See Excessive Engine Temperature. Have EFI System checked by an authorized Mercury MerCruiser dealer. Excessive Engine Temperature Possible Cause Water inlet or seacock closed. Drive belt loose or in poor condition. Open. Replace or adjust belt. Remedy 90-<strong>899883192</strong> NOVEMBER 2008 Page 105
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TABLE OF CONTENTS Section 1 - Warra
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Checking...........................
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Table of Contents Section 1 - Warra
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Transfer of Warranty Section 1 - Wa
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Section 1 - Warranty Conditions Tha
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Global Warranty Charts Section 1 -
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Warranty for Government Application
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Warranty for Government Application
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Commercial Application Warranty Cha
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Section 1 - Warranty Mercury MerCru
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How To Obtain Warranty Coverage Wha
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Section 1 - Warranty Disclaimers An
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Owner Responsibility "STD."—Emiss
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Section 2 - Getting to Know Your Po
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Instrumentation • consuming alcoh
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SYNCHRONIZING DUAL HELMS PRIOR TO S
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Section 3 - On the Water Operation
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Section 3 - On the Water Operation
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1. Refer to Remote Controls section
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Page 89 and 90: Transmission Linkage Section 5 - Ma
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899883192 - Valiant

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