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Hard Starting When Cold...

240Z240Z240Z

By 240Z240Z240Z
in Engine & Drivetrain

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240Z240Z240Z EnthuZiast

240Z240Z240Z

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One thing that will cause a stumble when coming off idle is if you are using ATF or similar thin oil in the carbs . This causes a lean mixture just coming off idle. Switch to 20wt and this will eliminate this . You may have other things going on but this will help a lot. ATF is 5wt too thin. The light oil causes the vacuum piston of the dampener to rise quickly. This is the opposite of what the dampener is designed to do. Gary

Agreed. I only use 20wt.

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