OM843NW2 10/09
4
Introduction
Unit Identifi cation
Servicing of marine engines and generator sets presents
unique problems. In many cases boats cannot be moved
to a repair facility. Marine engines cannot be compared
to the servicing of automobiles, trucks or even farm
equipment. Failures often occur in remote areas far
from competent assistance. Marine engines are taxed
far more severely than auto or truck engines; therefore,
maintenance schedules must be adhered to more
strictly.
Failures can begin with minor problems that are over-
looked and become amplifi ed when not corrected during
routine maintenance.
As operator, it is your obligation to learn about your
equipment and its proper maintenance. This is not a
comprehensive technical service manual. Nor will it
make the reader into an expert mechanic. Its aim is to
aid you in maintaining your unit properly.
W and 2
MODELS INCLUDED
This manual covers the operating instructions for:
M843N
W2
marine generator set.
Fill in the model number of your unit in the blank space provided.
This will give you a reference whenever service or maintenance is required:
W - New winding
2 - Tier 2 Compliant
+
+
Northern Lights marine diesel generator set with
an 843 engine and a PX-312K2 generator end, Tier II
compliant.
M
843
=
M
843NW
2
Model number of engine block
Bore Cylinders
84
mm
3
M -
Northern Lights marine generator set
Model Numbers
Model numbers give the unit's application, block model, aspiration, and RPM:
My Northern Lights generator set MODEL number is:
