Installation; Pulse Fuel Pump; Carburetor; Troubleshooting–Fuel System - Kohler Courage SV470 Service Manual

Installation

1. Install the new fuel pump, and secure with the
hex flange screws. Torque the hex flange screws
to 5.9 N·m (52 in. lb.). Do not over tighten.
2. Connect the inlet, outlet, and pulse lines to their
respective fittings on pump. Secure with the
clamps. See Figure 5-1.
Figure 5-1. Pulse Fuel Pump.

Carburetor

These engines are equipped with a Walbro fixed main
jet carburetor. See Figure 5-2. The carburetors will
have a low idle speed adjustment screw, and either
fixed idle, or a limiter cap on the idle fuel adjustment
needle.
Figure 5-2. Carburetor.
Fuel System and Governor
WARNING: Explosive Fuel
Gasoline is extremely flammable and its vapors can explode
if ignited. Store gasoline only in approved containers, in
well ventilated, unoccupied buildings, away from sparks or
flames. Do not fill the fuel tank while the engine is hot or
running, since spilled fuel could ignite if it comes in contact
with hot parts or sparks from ignition. Do not start the
engine near spilled fuel. Never use gasoline as a cleaning
agent.
Troubleshooting – Fuel System
If engine troubles are experienced that appear to be
fuel system related, check the following areas before
adjusting or disassembling the carburetor.
• Make sure the fuel tank is filled with clean, fresh
gasoline.
• Make sure the fuel cap vent is not blocked and
that it is operating properly.
• Make sure fuel is reaching the carburetor. This
includes checking the fuel shut-off valve, fuel
tank filter screen, in-line fuel filter, fuel lines, and
fuel pump (as equipped), for restrictions or faulty
components.
• Make sure the air cleaner base and carburetor are
securely fastened to the engine using gaskets in
good condition.
• Make sure the air cleaner element is clean, and all
air cleaner components are fastened securely.
• Make sure the ignition system, governor system,
exhaust system, and throttle and choke controls
are operating properly.
If, after checking the items listed above, starting
problems or conditions similar to those listed in the
following table exist, it may be necessary to adjust or
service the carburetor.
Section 5
5
5.3