honda-power-equipment harmony ii hrs216pda Manuel D’Utilisation

Spark Plug Service
Recommended spark plugs: BPR6ES (NGK) or W20EPR-U (DENSO)

For good performance, the spark plug must be properly gapped and 
free of deposits.

1. Disconnect the spark plug cap 

and remove dirt from the area.

2. Remove the spark plug with a 

spark plug wrench.

3. Inspect the plug; replace it if the 

electrodes are worn, or if the 
insulator is cracked or chipped

4. Set the gap to 0.028 ~ 0.031 in 

(0.7 ~ 0.8 mm).

5. Install the spark plug carefully, by 

hand, to avoid cross-threading.

6. After the plug seats, tighten it as 

follows to compress the washer:
Old plug: 1/8 to 1/4 turn
New plug: 1/2 turn

7. Install the spark plug cap on the 

spark plug.