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10w30 or 25w40 in 1999 Mercury 25hp bigfoot?
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<blockquote data-quote="TNtroller" data-source="post: 387201" data-attributes="member: 4251"><p>There should be a sticker under the cowling that looks like it has a thermometer on the sticker. This will indicate what weight of oil is acceptable to use in your motor based on the temperature range the OB will be operated in. If no electric start, the 25w40 will make it a bit more difficult to start in cooler/cold temps (harder to pull due to thicker oil).</p></blockquote><p></p>
[QUOTE="TNtroller, post: 387201, member: 4251"] There should be a sticker under the cowling that looks like it has a thermometer on the sticker. This will indicate what weight of oil is acceptable to use in your motor based on the temperature range the OB will be operated in. If no electric start, the 25w40 will make it a bit more difficult to start in cooler/cold temps (harder to pull due to thicker oil). [/QUOTE]
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10w30 or 25w40 in 1999 Mercury 25hp bigfoot?
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