Spark plug port compression cap

Details Spark plug port compression cap Spark plug port compression cap

1997-11-12

2000-04-18

McCall, Eric S.

Measuring and testing

Test stand

For engine

73 47, 73 497, 73119R, 73120, 33DIG15, G01M 1500

Patent

active

060501359

ABSTRACT:
The disclosed invention is an inexpensive, simple and reusable device to aid in setting the spark plug timing of an internal combustion engine by allowing one person to detect a piston's top dead center. In function, the detector is sealably inserted into a spark plug port and is forcibly expelled by the pressure maximum that occurs at top dead center. The detector's expulsion is accompanied by a "pop" sound similar to when a champagne cork is expelled from its bottle, and which can be remotely perceived by the user.

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