PURPOSE: To improve cost performance and assembling performance by integrating a support part for an adjusting screw and a turning prevention part with a crank case of an engine, and thereby reducing the number of part items.
CONSTITUTION: A governor adjusting mechanism 74 is arranged on an upper portion The governor adjusting mechanism 74 adjusts an engine speed to be kept constant by adjusting an initial set load of a tension spring 78. This mechanism 74 is made up of a support part 2d integrated with an upper portion of a crank case 2, an adjusting screw 81 penetrating a through-hole formed on the support part 2d, a thrust plate 82 reciprocably screwed with the adjusting screw 81, a compression spring 83 pressurized between the thrust plate 82 and the support part 2d, and a turning prevention part 2e for the thrust plate 82. The turning prevention part 2e is formed by two walls integrated with the crank case 2 parallelly to each other.
YANO KENJI
UMATSUKA NAOHITO
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