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post #1 of 3 Old 10-24-2019, 12:23 AM Thread Starter
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425 oil filler cap came off

While running, oil filler cap came off. Has happened twice. Messy oil splash to left side panel. Any thoughts as to why ? Thanks for any help.
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post #2 of 3 Old 10-24-2019, 03:54 AM
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Re: 425 oil filler cap came off

cap not tightened enough
depending on the style of cap, gasket/seal is too worn to prevent cap from rotating
something else wrong with the engine/machine, causing excessive vibration, that results in the cap vibrating off
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post #3 of 3 Old 10-24-2019, 11:33 AM
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Re: 425 oil filler cap came off

The oil cap on the 445 that I bought recently was loose when I bought it and had oil all over the side of the engine. I just tightened it really hard and that ended the problem. It has a detent lock on it that has to be overcome or it won't lock closed.
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