Generac Power Systems GN190H, Руководство по обслуживанию и ремонту

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9
SECTION 1: GENERAL
Purpose and Scope of Manual
This manual contains all information normally required to
service or repair the Models GN-190, GN-191 and GN-220
horizontal shaft engines. Applicable procedures are carefully
explained and illustrated.
For exploded views and listings of engine parts, refer to the
Owner's Manual for the specific device on which the engine
is used.
When ordering parts, always include the model and serial
number of the engine. Be sure to insist on genuine Gen-
erac repair parts.
NOTE: Engine Models GN-190RV, GN-191RV and GN-
220RV (Engine block Part Numbers 86923, 90993 and
90306, respectively) are vertical shaft long blocks. They
are used in Generac's computer controlled, variable
speed RV generator set. Service and repair information
for these vertical shaft long blocks is not included in this
manual. For specific information on these engines, refer
to "SERVICE MANUAL- COMPUTER CONTROLLED VARI-
ABLE SPEED RV GENERATORS," Part No. 94468-A.
Small Frame Engines
Engine Models GN-190, GN-191 and GN-220 are desig-
nated as "small frame" engines. The CHART on Page 3 lists
most engine models that were available at the time this
manual was published. Some of the differences between
specific engine models listed in the CHART are as follows:
1. Differences in the type of crankshaft
a. Some engine models may be equipped with a tapered
crankshaft.
b. Some models may have an unthreaded and keyed 3/4
or 1 inch crankshaft.
c. A 5/8 inch diameter threaded crankshaft is used on
some engines.
2. Some engine models are equipped with automatic idle
control, other models are not.
3. Some models may have an oil filter, others may not be so
equipped.
Long Block
The term "long block" refers to a basic engine which does
not include such items as a blower housing, air cleaner, car-
buretor, etc. Figure 1.1 shows a typical engine long block.
Figure 1.2 shows a typical complete engine.
Engine I.D. Number/Serial Number
The part number and serial number of the engine long block
can be found on a nameplate, located on the engine crankcase
(see Figure 1.3).
Figure 1.1 — Typical Long Block
Figure 1.2 — Typical Complete Engine
Figure 1.3 — Location of Part and Serial Numbers