Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Spark Plug: Testing and Inspection

Inspect them for electrode wear, carbon deposits and Insulator damage.
If any abnormality is found, adjust air gap, clean with spark plug cleaner or replace them with specified new plug.

Spark plug air gap
"a": 1.0 - 1.1 mm (0.039 - 0.043 in.)

Spark plug type
DENSO: SK16PR11
NGK: *IFR5G11

NOTE: Under -25 °C (-13 °F), the spark plugs with an asterisk (*) are highly recommend for better engine starting performance.