Troubleshooting - TOHATSU NB-1000 Service Manual

SECTION 4

TROUBLESHOOTING

The troubleshooting chart lists common engine symptoms related
to problems with the powerhead. It also indicates specific
component failures which may be causing the problem so it can be
isolated more effectively.
Checks
Poor crankcase seal
Ignition timing or throttle linkage
out of adjustment, see Section 2
Water entering crankcase
Defective thermostat
Fouled, defective or incorrect
spark plug; wrong gap setting
Worn or defective cylinder, piston,
rings or warped head
Blown cylinder head or engine
base gasket
Worn connecting rod or
crankshaft bearings, internal
wear limits out of specification
Defective ignition components,
see Section 7
Carbon accumulation in
combustion chamber
4-6
Symptom
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1-/ 2-Cylinder