Operator`s manual
DESCRIPTION OF INSTRUMENT PANELS 
Westerbeke offers 
two 
types 
of 
control panels 
as 
optional equipment for the W 35B, the W 38B, and the W 
42B engines,  Read the 
following instructions that apply 
to 
the panel you purchased with your engine. 
Captains 
Panel 
General 
The  manually-operated Captains 
Panel 
is 
equipped with  a Key  Switch,  an 
RPM 
gauge,  a  PREHEAT  and 
START  button, and  an  instrument test button along with a low oil  pressure/high water temperature alarm. 
The 
RPM 
gauge 
is 
illuminated when the key switch 
is 
turned ON and remains illuminated while the engine is 
in operation. The key switch and the three buttons serve the following  functions: 
1. 
Key Switch:  The Key Switch provides power only to the instrument panel cluster.  Refer to the "STOP-
PING PROCEDURE" 
section 
of 
this manual,  page 
41. 
2. 
PREHEAT:  The PREHEAT  button energizes the alternator's regulator,  the engine's glow plugs, and 
bypasses the engine's oil pressure alarm switch. 
In addition, this button energizes the START button. 
3. 
START: 
The START  button, when pressed, energizes the starter's solenoid which cranks the engine. 
This button 
will  not operate electrically unless the PREHEAT button 
is 
pressed and held at the same 
time. 
4. 
Test Button:  The Test Button, located above the Key Switch, tests the alternator, the oil pressure, and 
the water temperature control circuits.  When this button 
is 
pressed, the alternator, the oil pressure, and 
the water temperature indicator lights illuminate in 
addttion 
to 
sounding the alarm. 
35 
Weslerbeke 
Diesel Engines 










