Service manual

TROUBLESHOOTING SERVICE MANUAL NUMBER 26
Page 1C-30 90-861329--1 MARCH 1999
Water On Top Of Pistons
Cause Special Information
Operator shut engine off at high rpm
Engine “diesels” or tries to run backwards
Engine out of tune, poor fuel, high idle
rpm, timing set too high
Rain water running into flame arrestor Hatch cover
Spark plug misfiring
Improper combustion causes moisture in
the air to accumulate in the cylinder
Backwash through the exhaust system
Improper engine or exhaust hose
installation
Cracked exhaust manifold
Improper manifold to elbow gasket
installation
Loose cylinder head bolts
Blown cylinder head gasket
Check for warped cylinder head or
cylinder block
Cracked valve seat
Porous or cracked casting
Check cylinder heads, cylinder block, and
intake manifold
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