Remove Exhaust Nipples (If Equipped); Remove Port Liners (If Equipped); Inspect Exhaust System; All Models - Briggs & Stratton Twin Cylinder L-Head Repair Manual

Remove Exhaust Nipples (If Equipped)

Remove exhaust nipples by loosening lock nuts first
and then turn out nipples. Penetrating oil may be
required to prevent galling exhaust port threads,
Fig. 12.

Remove Port Liners (If Equipped)

Remove two (2) cap screws, port liners and gasket,
Fig. 13. Penetrating oil may be required to loosen and
prevent galling port liner mounting threads.

INSPECT EXHAUST SYSTEM

All Models

Check muffler mounting bracket and/or muffler adapt-
ers for cracked welds or breakage. Check muffler(s) for
split seams, loose internal parts or cracked welds.
Replace any damaged parts with new Original Equip-
ment Parts.

ASSEMBLE EXHAUST SYSTEM

All 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 Exhaust Nipple

1. Install lock nut on nipple with tangs toward
shoulder, Fig. 14.
2. Thread nipple into exhaust port finger tight.
3. Tighten lock nut securely, not more than two (2)
threads should be showing, Fig. 14.

Install Exhaust Port Liners

1. Install port liner, new gasket and cap screws,
Fig. 15.
2. Torque cap screws to 90 in. lbs. (10.0 Nm).
14
Fig. 12 – Exhaust Nipple
GASKET
Fig. 13 – Removing Port Liners
GASKET
Fig. 14 – Install Port Liners
SHOULDER
TANG
Fig. 15 – Exhaust Nipple Installed
EXHAUST
NIPPLE
LOCKNUT
CAP
SCREWS
PORT
LINER
CAP
SCREWS
PORT
LINER
5