Service Manual
1-10
Table of Contents
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
GENERAL SERVICE INFORMATION
Troubleshooting (Cont.)
Problem Possible Causes Next Step...
Engine Hard Starting/Poor
Running (Cont.)
Sufcient Compression Check: leak down test, compression test,
valve(s) not seating, head gasket leaking or
worn cylinder
Engine Overheats Cooling Screen and Fan Check: damage or debris build-up
Engine Gaskets Leaking Check: valve cover or head gasket leaking
Oil Check: proper oil viscosity for temperature,
proper level, condition
Excessive Engine Load Check: not operating unit at full throttle under
load
Cylinder Cooling Fins Check: blocked or broken
Engine doesn’t Crank Electrical issues Check: battery voltage to electric starter motor
or engine grounds, safety interlock system
Electric starter
Check: bench test electric start; see “Bench
Test,” chapter 5, page 5-15