DeWalt DXGNR7000 - Problem 16 - Engine Starts Hard and Runs Rough; Problem 17

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Diagnostic Repair Manual 21

Section 3 Engine Diagnostic Tests

Introduction

Use the Flow Charts in conjunction with the detailed instructions in Section X.X. Test numbers used in the flow charts

correspond to the numbered tests in Section X.X. The first step in using the flow charts is to identify the correct problem

on the following pages. For best results, perform all tests in the exact sequence shown in the flow charts.

Problem 9 – Recoil Cord Will Not Pull

Problem 10 – Engine Starts Hard and Runs Rough

NOTHING

FOUND

FIX BAD COMPONENT

BAD

VISUALLY INSPECT FOR OBSTRUCTIONS

THAT WOULD CAUSE BINDING OF THE

RECOIL ONCE INSTALLED

AN INTERNAL ENGINE FAILURE HAS OCCURED.

VISUALLY INSPECT EXTERNAL

COMPONENTS FOR A FAILURE

THAT WOULD CAUSE THE

ENGINE TO BE SIEZED

REPLACE

BAD

GOOD GOOD

TEST 33 – TEST

RECOIL

FUNCTION

TEST 34 –

TEST ENGINE

FUNCTION

REPAIR

OR REPLACE

REPAIR

OR REPLACE

BAD

GOOD GOOD

GOOD

TEST 20 –

CHECK

SPARK

CHECK FUEL

SUPPLY

CHECK CHOKE

POSITION AND

OPERATION

TEST 21 –

CHECK

SPARK PLUG

TEST 22 –

CHECK

CARBURETION

TEST 24 –

CHECK VALVE

ADJUSTMENT

CHECK FLYWHEEL KEY

TEST 25 – CHECK

ENGINE / CYLINDER

LEAK DOWN TEST /

COMPRESSION TEST

REPLACE SPARK PLUG

PUSH IN AFTER

STARTING

REPLENISH

FUEL

SUPPLY

REPLACE

IGNITION COIL

REPAIR OR REPLACE AS NECESSARY

REFER TO ENGINE SERVICE MANUAL

GOOD

ENGINE MISS

IS APPARENT

LOW FUEL

BAD

ADJUST VALVES

AND RETEST

BAD

TEST 29 – CHECK

AND ADJUST

GOVERNOR

TEST 26 – CHECK

IGNITION COIL

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DeWalt DXGNR7000 - Problem 16 - Engine Starts Hard and Runs Rough; Problem 17 - Engine Starts Then Shuts Down

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