Rev: 2
Date: 11/15/18
13-2
O
VERVIEW
..................................................................................................................... 13-2
Components .............................................................................................................. 13-3
Fuel System Schematic ............................................................................................ 13-4
S
ERVICE
........................................................................................................................ 13-6
Supplies .................................................................................................................... 13-6
Special Tools ....................................................................................................................................................... 13-6
Expendable .......................................................................................................................................................... 13-6
Replaceable ......................................................................................................................................................... 13-6
General ..................................................................................................................... 13-6
Draining the fuel system ...................................................................................................................................... 13-7
Fuel tank removal ................................................................................................................................................ 13-8
Installation ........................................................................................................................................................ 13-8
Fuel system component removal ......................................................................................................................... 13-8
Installation ........................................................................................................................................................ 13-9
Service Schedule Procedures ................................................................................... 13-9
Gascolator cleaning ............................................................................................................................................. 13-9
Installation ...................................................................................................................................................... 13-10
Coarse fuel tank screen removal ....................................................................................................................... 13-10
Installation ...................................................................................................................................................... 13-10
Fuel pressure/return assembly replacement...................................................................................................... 13-10
Installation ...................................................................................................................................................... 13-11
Fuel pressure hose fllush ................................................................................................................................... 13-11
Fuel return hose flow check ............................................................................................................................... 13-12
Fuel drain hose replacement ............................................................................................................................. 13-13
Removal ......................................................................................................................................................... 13-13
Installation ...................................................................................................................................................... 13-13
Fuel prefilter cleaning/inspection ....................................................................................................................... 13-13
Main filter replacement ...................................................................................................................................... 13-14
Long Term Storage ............................................................................................................................................ 13-15
Draining The Carburetor Bowl ........................................................................................................................... 13-15
OVERVIEW
The portion of the fuel system common to both engine models consists of a filler
neck and cap assembly, 20.2 gallon fuel tank, tank fuel level sending unit, mechanical
fuel level gauge, a finger screen fuel strainer at the bottom tank outlet preventing larger
foreign objects from progressing through the fuel system, and a fuel return line.
ULS Engine
The finger screen fuel strainer outlet feeds (in order as listed) a single ES 40135 12V
DC solid-state electric fuel pump located under the mid baggage floor cover. This
serves as an auxiliary fuel pump to the mechanical engine driven pump. The aux. pump
operates full time. The fuel pump outlet feeds (in order as listed) a remote controlled
fuel shut-off valve, gascolator/filter, main fuel line routed fwd. to the firewall, engine
driven fuel pump, and then a fuel distribution manifold feeding both carburetors, the fuel
pressure sensor, and hose that connects to the fuel return line.
iS Engine
The finger screen fuel strainer outlet feeds (in order as listed) a remote controlled fuel
shut-off valve, a fuel system adapter that proves a system sumping low point, pre-filter,
dual pump high pressure fuel pump assembly, manifold block for fuel pump output
Summary of Contents for RV 12iS
Page 1: ...Rev 2 Date 11 15 18 i MAINTENANCE MANUAL Aircraft Serial Number ___________________________...
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