TOHATSU V20E - Troubleshooting Pump and System Issues; Compression and Suction Problems

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TROUBLESHOOTING
Trouble
Cause
Battery Charging failure Starter motor does not work Engine start failure Engine stumble or stall Rough idling Idling is too high Poor acceleration Engine over-rev. Engine overheat Engine seizing
Action
Compression
Piston, piston ring
or cylinder
excessively worn
● ● ● ● ● Correct or replace.
Carbon
deposition in the
combustion
chamber
● ● ● Clean out.
Suction
Suction height too
high or length too
long
Make it pump
location to nearer
and/or lower
position.
Suction hose end
is not in water
Put the end of
suction hose below
300mm (11.8 in) of
the surface of the
water.
Suction hose
coupling loose or
gasket defective
Clean out a gasket
and tighten securely.
Replace a gasket if
necessary.
Suction hose
strainer clogged
with dead leaf or
waste etc.
Clean out.
Suction hose
cracking or Lining
peeling off
Repair or replace.
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