General Information
INTRODUCTION
This manual deals with specific mechanical and elec-
trical information needed by engine mechanics for
troubleshooting, servicing, repairing, or overhauling
the engine.
Use the table of contents for a quick reference to the
separate engine system sections.
Use the separate Parts Catalogs available at the
dealer level, for parts identification and for establish-
ing their proper location on assemblies.
The troubleshooting guide is provided as a quick
reference for locating and correcting engine trouble.
The illustrations and procedures presented in each
section apply to the engines listed on the cover. The
flywheel-blower end of the engine is the front end
so
right and left sides are determined by viewing the
engine from the front.
The disassembly section contains major overhaul
procedures for step by step removal, disassembly,
inspection, repair and assembly of the engine
components.
If a major repair or an overhaul is necessary, a compe-
tent mechanic should either do the job or supervise
and check the work of the mechanic assigned to do
the job to ensure that all dimensions, clearances and
torque values are within the specified tolerances.
The wiring diagram on the last page of the manual
shows how the electrical components are inter-
connected.
A parts catalog (availableat the dealer level) contains
detailed exploded views of each assembly and the
individual piece part numbers and their proper names
for ordering replacement parts.
Use only Genuine Onan replacement parts to ensure
quality and the best possible repair and overhaul
results. When ordering parts, always use the com-
plete Model and Spec number as well as the Serial
number shown on the nameplate.
ENGINE MODEL REFERENCE
Identify your model by referring to the MODEL and
SPEC (specification) NO. as shown on the unit
name
plate
Always use this number and the engine
serial number when making reference to your engine.
How to interpret MODEL and SPEC
NO
2 60G G
A
024
1
A
1234567
8 9
1.
Factory code for general identification of basic
2.
Number of cylinders.
3.
Cubic inch displacement.
4.
Engine duty cycle.
5.
Fuel required (G=gasoline).
6.
Cooling system description
(A=air-cooling-pressure).
7.
BHP rating.
8.
Factory code for designated optional equipment,
9.
Specification (spec letter) which advances with
engine series.
if
any.
factory production modifications.
WARNING
I
INCORRECT SERVICE
OR
REPLACEMENT OF PARTS CAN RESULT IN SEVERE
PERSONAL INJURY AND/OR EQUIPMENT DAMAGE. SERVICE PERSONNEL
MUST BE QUALIFIED TO PERFORM ELECTRICAL AND/OR MECHANICAL
SERVICE.
1-1
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