Dinli DL702, Руководство по обслуживанию, Страница: 95 / 99

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APPENDIX
CAUTION
If the spark plug is replaced with a type other than the
standard plug, make certain the replacement plug has the same
thread pitch and reach (length of threaded portion) and the
same insulator type (regular type or projected type) as the
standard plug.
If the plug reach is too short, carbon will build up on the plug
hole threads in the cylinder head, causing overheating and
marking it very difficult to insert the correct spark plug later. If
the reach is too long, carbon will build up on the exposed
spark plug threads causing overheating, pre ignition, and
possibly burning a hole in the piston top. In addition, it may be
impossible to remove the plug without damaging the cylinder
head.
CAUTION
The heat range of the spark plug functions like a thermostat for
the engine. Using the wrong type of spark plug can make the
engine run too hot (resulting in engine damage) or too cold
(with poor performance, misfiring, and stalling).