Generac Power Systems GP1800

PART 3
ENGINE
TROUBLESHOOTING
GP Series Portable Generators
Page 33
TABLE OF CONTENTS
PART TITLE PAGE#
3.1 389/206/163cc Troubleshooting
Flow Charts
34
3.2 410cc Troubleshooting Flow
Charts
37
3.3 Diagnostic Tests 42
Part 3 – Engine Troubleshooting .......................... 33
Section 3.1 – 389/206/163cc Troubleshooting
Flowcharts ....................................... 34
Section 3.2 – 410cc Troubleshooting Flowcharts .. 37
Section 3.3 – Diagnostic Tests .............................. 42
Test 20 – Check 1.5 Amp Fuse ........................42
Test 21 – Check Battery & Cables ...................42
Test 22 – Check Voltage at
Starter Contactor (SC) ........................42
Test 23 – Check Start-Run-Stop Switch ..........42
Test 24 – Test OFF-ON Switch .........................43
Test 25 – Check Starter Motor .........................43
Test 25 – Check Ignition Spark ........................45
Test 26 – Check Spark Plugs ...........................46
Test 29 – Check Carburetion ...........................46
Test 30 – Choke Test ........................................47
Test 33 – Check Valve Adjustment ...................47
Test 36 – Check Engine / Cylinder Leak Down
Test / Compression Test ......................48
Test 38 – Check Flywheel ................................48
Test 39 – Remove Wire 18 / Shutdown Lead ...49
Test 40 – Check / Adjust Governor
(389cc Engine) ....................................49
Test 41 – Check / Adjust Governor
(410cc Engine) ....................................50
Test 45 – Check Oil Level Switch .....................51
Test 46 – Check Oil Pressure Switch ...............51
Test 49 – Test Recoil Function .........................52
Test 50 – Test Engine Function ........................52