Westinghouse — Spark Plug Maintenance
Maintenance · Ignition system
From a Westinghouse owner's manual covering: WH3250, WH4500, WH5500, WH6000, WH6500E, WH7000, WH7500E, WHC6000S, WHC6500, WHC7000EGC. Check it applies to your exact model before use.
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Before you start
- Never apply side load when removing the spark plug
Procedure
- Remove spark plug boot without side loading it
- Clean area around the spark plug
- Remove spark plug with 13/16 in. socket wrench
- Cover opening with a clean rag to keep dirt out
- Inspect for cracked/chipped insulator, wear, and gap
- Replace if gap out of 0.024-0.032 in. spec or plug fails inspection
- Hand-thread new/cleaned plug back in until it bottoms out
- Tighten with 13/16 in. socket wrench to fully seat
- Replace spark plug boot, fully engaging the tip
Tools required
- 13/16 in. spark plug socket wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Gap 0.024-0.032 in. (0.60-0.80 mm)
- Champion RN9YC FridayParts $14.21 or equivalent
Source: Westinghouse owner's 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.