Briggs & Stratton BIG BLOCK EFI, Repair Manual

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124 Section 5: Removal/Installation
7. Remove four hex screws (5-8) to release
carburetor shield and throttle body adapter
from throttle body.
8. See B of Figure 5-20. Squeeze clip and re-
move EVAP tube (to throttle body adapter)
from top of fuel pump module.
Installation
1. Insert four hex screws (5-8) through carbu-
retor shield and air cleaner backplate.
NOTE: Air cleaner backplate is stamped
“Air Filter Side” to ensure proper instal-
lation. Also, be sure carburetor shield is
oriented so that the threaded stud is at the
bottom.
2. At back of air cleaner backplate, hang gas-
ket on four hex screws.
3. Insert four hex screws (5-8) through throttle
body adapter and start into throttle body.
4. Start lower hex fl ange screws (3-4) to
fasten air cleaner backplate to fuel pump
module bracket.
5. Start upper hex fl ange screws (1-2) to fas-
ten air cleaner backplate to ECM/fuse block
bracket.
6. Alternately tighten four carburetor shield
hex screws (5-8) to 78-96 in-lbs (9-11 Nm)
using a crosswise pattern.
7. Alternately tighten four backplate hex
fl ange screws (1-4) to 174-217 in-lbs (20-
25 Nm) using a crosswise pattern.
8. Place air fi lter element onto air fi lter mount.
9. Fit metal retainer plate evenly and snugly
into air fi lter element.
10. Install thumb nut onto threaded stud and
tighten until snug.
11. Install air fi lter cover.
12. Install plastic knob onto threaded rod to
secure air fi lter cover.
Throttle Body
Removal
1. Remove access cover. See Access Cover/
Blower Housing, Removal, steps 1-3.
2. See Air Cleaner Assembly, Removal.
3. Remove two Phillips screws to release
ECM and ECM ground wire ring terminal
from ECM/fuse block bracket.
4. Remove hex fl ange screw to release ECM/
fuse block bracket from throttle body.
5. Remove two hex fl ange screws to release
throttle body from intake manifold.
6. Disconnect IAC connector.
B
Figure 5-20 Air Cleaner Backplate/Throttle Body Adapter.
1 2
3 4
5 6
8 7
A