Replace Spark Plug; Cleaning The Exhaust System - Briggs & Stratton 276535 Repair Manual

REPLACE SPARK PLUG

Replace spark plug every year. Replace spark plug if
electrode is burned away or if the porcelain is cracked. A
spark plug that is dirty, pitted, carbon covered or has
worn electrodes may cause hard starting and/or poor
operation. Clean plug with a wire brush. Do not sand
blast. Use
NGK BPMR 4A
gap (Figure 11) at
.028-.032 in. (.71-.81mm)
plug to
150-200 lb-in. (17-23 Nm)
.28-.032 in.
(.71 - .81mm)
Fig. 11

CLEANING THE EXHAUST SYSTEM

1. Remove the muffler (Figure 12) by removing the
bolts shown. Clean as needed.
BST01-82
Fig. 12
Page 4
or equivalent. Set spark plug
. Torque spark
.
2. Inspect exhaust port (Figure 13). If cleaning is
necessary, rotate piston to cover exhaust port,
and scrape carbon from exhaust port area. Use
wood only to clean this area.
BST01-83
Fig. 13
3. Install the muffler and torque the bolts to
.
(9Nm)
2-Cycle Snow Engine
Section 1 - General Information
80 lb-in.