Westerbeke 12C- TWO Operator's Manual page 42

ENGINE TROUBLESHOOTING
The following troubleshooting table describes certain problems
relating to engine service, the probable causes of these prob-
lems, and the recommendations
to
overcome these problems,
NOTE: Fuel run/shut off solenoid (Optional).
Problem
Probable Cause
No pan,1 indications; fu,lsol,nold
1. Battel)l switch not on.
or fuel pump Is not working (key switch
is on and PREHEAT button Is depressed).
2. 20-amp ch'cult breaker tripped.
3. 1 O-amp breaker tripped on
preheat solenoid
4. loose batlel)l connections.
5. Preheat solenoid not operating.
START button is depressed, no starter
1. Connection to solenoid faulty.
engagement. .
2. Gear shift not in neutrel.
3. Faulty switch.
4. Faulty solen'oid.
5. loose battel)l connecllons.
6. low battel)l.
NOTE: The engine's electrical system is protected
by
a 20
ampere manual reset circuit breaker located all a bracket at
the back of the engille. The preheat solelloid is niounted on.
the same bracket.
Verilicallon/Remedy
1. Check switch andlor battel)l connections.
2. Reset breaker;
n
breaker Irlps again, check preheat solenoid
circuit and check circuit for shorts to· ground.
3. Check the ~ollage both al and after the breaker on Ihe
preheat solenoid.
4. Check (+) connection to starter solenoid and (-) connection to
engine ground stUd. Check battel)l cable connections.
5. Check solenoid "s" terminal for voltage.
1. Check connection.
2. Gear shift must be In neulrel (see NEUTRAL SWITCH under
HURTH HSW TRANSMISSIONS).
3. Check switch wilh ohmmeter.
4.
Check that 12 volts are present at the solenoid connection.
5. Check battel)l connections.
6. Check battel)l charge state.
START button 15 depressed; panel 1. Poor connections to fuel solenoid. 1. Check connections.
indications OK; starter solenoid OK;
Check that 12 volts are present althe (+) connection on the fuel solenoid n~t functioning. 2. Defective fuel solenoid.
2.
fuel run solenoid.
Engine cranks, but does not
1. Faulty fueling system. 1. Check that fuel valves are open.
start. fuel solenoid energized.
1a. Check for air In fuel system. Bleed air from fuel system.
1b. Fuel filters clogged. Replace filters and bleed air from
fuel system.
2. Preheat solenoid faulty. 2. Check solenoid.
3. Low battery power. 3. Swllch to combine house and start batteries.
3a. Replace batteries.
Engine can't be stopped. 1. Faulty DC allernator. 1. Remove Exc. connection at alternator: repair alternator.
2. Dlsconn.ct fuel shut-off cable. 2. Check connection at shut-off lever. Pul11ever back to close
offlhe lu.1
3.
Fuel run solenoid will not
de-en~rgize.
3. Manually shut the engine down using the shut off lever
adjacent to the throttle lever on the engine.
Battery runs down.
1. Oil pressure switch. 1. Observe if gauges and panel lights are aclivaled when .nglne
. Is not running, Test the oil pressure switch:
2. High resistance leak to ground. 2. Check wirlng.lnsert.sensitiv, (0 - .25 amp) meter In battel)l
lines. (Do not start engine.) Remove connections and replace
after short is located.
3. Low resistance leak.
3. Check all wires for temperature rise to locate the fault.
4.
Poor battety connectIons.
4.
Check cable connections at battery for loose connect10~S,
corrosion
5. DC alternator not charging 5. Check connections, check belt tens10n, test alternator. See
-
(tachometer notop,retlngl.
OC ELECTRICAL SYSTEM/ALTERNATOR.
Battel)l not charging 1. DC charge circuit faulty.
1. Pertorrn DC voltag. check of g.n.retor charging circuit. See
7iJsting the B,Uety Charging Circuit
2.
2. Check drive belt tension; alternator should turn freely. Check
.
Alternator IIrlve.
for loose connections. Check output with Voltmeter. Ensure 12
volts are present at the Exc. terminal.
(continued)
EI1g1nes
&
Generators
35