honda-automobiles hrb217tda ユーザーズマニュアル

Incorrect spark plugs can cause engine damage.
For good performance, the spark plug must be properly gapped and 
free of deposits.
1. Disconnect the spark plug cap 

and remove any dirt from 
around the spark plug area.

2. Remove the spark plug with a 

13/16 in (21 mm) spark plug 
wrench. 

3. Inspect the spark plug. Replace 

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

RECOMMENDED SPARK PLUGS

REGULAR

RESISTOR*

NGK

BP6ES

BPR6ES

DENSO

W20EP-U

W20EPR-U

*Resistor spark plugs reduce interference with radio and TV reception.