Рекомендую выточить колечко из алюминия и одеть его на узел крыльчатки. При этом нужно не забыть сделать фаску на внутренней стороне кольца и слегка подточить с обоих сторон штырь, который входит в зацепление с крыльчаткой.
Увидел ответ на свой вопрос в другой ветке.
ИМХО - настроить двигаетль и ломаться перестанет.
Очень похоже на перезалив при старте.
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