Install Muffler And Mounting Bracket; Install Air Guides - Horizontal Crankshaft Models; Install Air Guides And Top Plate - Vertical Crankshaft Models; Assemble Exhaust System - Briggs & Stratton Twin Cylinder L-Head Repair Manual

Install Muffler and Mounting Bracket

1. Assemble muffler to mounting bracket loosely with
four (4) cap screws.
2. Install muffler assembly on engine sliding muffler
pipes onto exhaust nipples or port liners.
3. Install four (4) screws through muffler mounting
bracket into crankcase cover or sump, torquing
screws to 225 in. lbs. (25.0 Nm).
4. Torque muffler screws to 80 in. lbs. (9.0 Nm).
Install Air Guides – Horizontal Crankshaft
Models
For ease of assembly, it is best to start all screws
holding air guides and shields before tightening any
screws. This will permit easy alignment of all screw
holes and parts.
1. Place heat shield (optional) and rear insert on air
guide frame, Fig. 16, and start two (2) screws.
2. Install #1 and #2 cylinder air guides and align holes
to start screws.
3. Tighten all 16 screws.
Install Air Guides and Top Plate – Vertical
Crankshaft Models
For ease of assembly, it is best to start all screws
holding air guides and shields before tightening any
screws. This will permit easy alignment of all screw
holes and parts.
1. Lay top plate on muffler assembly.
2. Install #1 and #2 cylinder air guides and install
twelve screws loosely to permit alignment.
3. Tighten twelve screws securely, Fig. 17.

ASSEMBLE EXHAUST SYSTEM

All Non Ducted Engine Models

Use Valve Lubricant (Part #93963) on all exhaust
system threads to prevent galling of threads and
permit easier disassembly, should it be required.

Install Cylinder Air Guides And Shields

1. Assemble cylinder shield locating tabs in slots of
cylinder air guide, Fig. 18.
2. Install assembly on engine starting all screws
loosely to permit easy alignment of holes.
6
14
REAR
INSERT
AIR
GUIDE
FRAME
Fig. 16 – Install Ducting
AIR
GUIDE
TOP
PLATE
Fig. 17 – Install Top Plate and Cylinder Air Guide
CYLINDER
SHIELD
CYLINDER
AIR GUIDE
Fig. 18 – Assemble Shields and Air Guides
HEAT
SHIELD
AIR
GUIDE
TAB IN
SLOTS