Briggs & Stratton — Spark Plugs (Removal/Installation)
Maintenance · Ignition
From a Briggs & Stratton service manual — check it applies to your exact model before use.
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Procedure
- Remove spark plug cables from spark plug terminals; always pull on the boot at terminal end.
- Thoroughly clean area around spark plugs.
- Remove spark plugs from cylinder heads using a 5/8 inch spark plug socket.
- Clean spark plugs using a wire brush and commercial solvent; do not blast.
- Obtain new spark plugs if electrodes are pitted, burned, or porcelain is cracked.
- Check spark plug gap with a wire feeler gauge; adjust to 0.020 inch (0.508 mm).
- Finger tighten spark plugs into cylinder heads, then tighten to 180 in-lbs (20 Nm).
- Install spark plug cables onto spark plug terminals.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug type RC12YC Amazon eBay $12.90 NAPA $11.52 FridayParts $19.99
- Spark plug gap 0.020 inch (0.508 mm)
- Spark plug torque 180 in-lbs (20 Nm)
Source: Briggs & Stratton service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.