5F-12 - BOS / SAV EMISSIONS 90-823225--1 1096
IMPORTANT: The hose that runs from the T-Fit-
ting to the back side of the carburetor must be
routed beneath the throttle linkage as shown in
the following illustration. Use care to ensure that
the hose does not rub against linkage.
71916
71917
a
b
a-T-Fitting
b - Hose T-Fitting to Back of Carburetor)
Propane Assisted Idle Set Procedure
!
WARNING
Avoid fire or explosion. Observe the following
precautions when performing this procedure.
• Do not operate the engine without the flame
arrestor installed, above the speeds listed in
this procedure.
• Propane is extremely flammable and explo-
sive. Ensure that the following test is per-
formed in a well ventilated area with the en-
gine hatch open.
• Ensure that there is no spark or open flame in
the test area.
• Do not start the flow of propane until the hose
has been placed into the carburetor and the
engine has been started.
• Keep a fire extinguisher available when per-
forming this test.
NOTE: This test must be performed any time the car-
buretor has been disassembled and internal compo-
nents have been disturbed or the idle mixture screws
have been tampered with. The test should also be
performed if other component parts of the emissions
system have been altered, repaired, or replaced.
IMPORTANT: Ensure that the PVS is functioning
properly before performing this procedure.
1. As a starting point, set both idle mixture screws
at 1 turn out from the fully seated position.
2. Start engine and allow it to warm up to normal op-
erating temperature. If engine has been run
above idle speed, allow engine to idle for 3 to 5
minutes to stabilize the engine.
3. Remove flame arrestor.
4. Insert special “Y”-Adapter hoses into carburetor
as shown. Place the hoses behind the choke
plate to help hold them in place.
73731
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