Westerbeke W-27 Service Manual

CONTROL PANEL TROUBLESHOOTING
MANUAL STARTER DISCONNECT {TOGGLE SWITCHES}
NOTE: The engine control system is protected by a 20 amp manual reset circuIt breaker
mounted
on a bracket at the lOp rear of the engine near the PREHEAT circuit.
PROBLEM PROBABLE CAUSE
VERIFICAnON/REMEDY
PREHEAT depressed, no panel indications, 1.
Battery switch or power not on.
1. Check switch and/or battery·connections.
fuel solenoid. electric fuel pump and
preheat solenoid not energized. 2. 20 amp circuit breaker tripped.
2.
Reset..breaker. If opens again, check preheat sole-
enoid circuit and "run" circuit for shorts to ground.
START SWITCH DEPRESSED, no starter 1. Connection to solenoid faulty.
1. Check connection.
engagement.
2. Faulty switch.
2.
Check switch with ohmmeter.
3. Faulty solenoid.
3. Check "that 12 volts are present at the solenoid con-
nection.
4.
Loose battery connections. 4.
Check battery connections.
5.
Low battery. 5.
Check battery charge state.
START DEPRESSED, panel indications OK.
1. Poor connections to fuel solenoid. Defective fuel run 1.
Check mechanical positioning of the fuel solenoid
Start solenoid OK. Fuel solenoid not solenoid. (PIN 2304)
for plunger and throttle arm.
functioning.
2.
Manually check movement of the fuel run solenoid
plunger and throttle arm.
NO IGNmON, cranks, does not start. Fuel
1. Faulty fueling system. 1.
Check for fuel to generator system.
solenoid energized.
2. Check for air in the fuel system.
Allow system to self-bleed.
3. Fulliitt pump faulty.
ENGINE STOPS
1. Switch and wiring. 1. Inspect all wiring for loose connections and short
Circuits.
NOT CHARGING BATIERY
1. Alternator drive. 1.
Check the drive belt and its tension. Be sure the
alternator turns freely. Check for loose connections.
Check the output with a voltmeter. Ensure 12V are
present at the regulator terminal.
BATIERY RUNS DOWN
1. Oil pressure switch.
1.
Observe if the gauges and panel lights are activated
when the engine is not running. Test the oil pressure
switch.
2. High resistance leak to ground.
2.
Check the wiring. Insert senSitive (0-.25 amp) meter
in battery lines (Do not start engine). Remove con-
nections and replace after short is located.
3. Low resistance leak to ground.
3.
Check all wires for temperature rise to locate the
fault.
4. Alternator. 4.
Disconnect alternator at output, after a good battery
charging. Jfleakage stops. Remove alternator and
bench test. Repair or replace.
TROUBLESHOOTING WATER TEMPERATURE AND OIL PRESSURE GAUGES
If the gauge reading is other than what is normally indicated
by the gauge when the instrument panel
is energized, the first
step is to check for 12 volts DC between the ignition (B+)
and the Negative (B-) tenninals
of the gauge.
Assuming that there
is 12 volts as required, leave the instru-
ment panel energized and perform the following steps:
1. Disconnect the sender wire at the gauge and see if the
gauge reads zero, which
is the normal reading for this
situation.
2. Connect the sender terminal at the gauge to ground and
see
if the gauge reads full scale, which is the normal
reading for this situation
If both
of the above gauge tests are positive, the gauge is
undoubtedly
OK and the problem lies either with the con-
ductor from
the sender to the gauge or with the sender.
If either
of the above gauge tests are negative, the gauge is
probably defective and should be replaced.
Assuming the gauge is
OK, check the conductor from the
sender to the sender tenninal at the gauge for continuity.
Check that the engine block is connected to the ground.
Some starters have isolated ground terminals and
if the
battery is connected to the starter (both plus and minus
terminals), the ground side wjJl not necessarily be connected
to the block.
Engines & Generators
52

Westerbeke W-27 Specifications

General

Brand	Westerbeke
Model	W-27
Category	Engine
Language	English