| 摘要 |
PURPOSE:To prevent the readjustment on user side after final optimum adjustment by connecting a very simple adjusting port closure means onto an advancing operation adjusting apparatus on idling. CONSTITUTION:When the establishment of optimum state for ignition time is completed by adjusting an adjusting sleeve 6, a male screw piece 13 is inserted into an opening 103, screwed with the surface of a female screw and a bolt head 132 is turned by a spanner. The male screw piece 13 is screwed into the opening 103 to the stepped part, and a strong turning force is applied onto the bolt head 132, even after the front surface of the male screw piece 13 contacts with the stepped part of the opening 103 and screw-advance is impeded, then the connecting part 131 is twisted off, and the bolt head 132 is separated. Accordingly, from this time, the readjustment due to the loosening of the male screw piece 13 on user side can be prevented. |
