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Thread: Mercury 2.5 EFI 260 oil mixture
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05-08-2022, 12:50 PM #1
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Mercury 2.5 EFI 260 oil mixture
Hello, this season a put 2 Mercury 2.5 EFI 260 in place of twin 2.4 EFI bridgeport. Last year i raced with the 2.4 and make oil mixture at 3% and run at 6900 RPM, with family in daily use 2% and never had problems. With the 2.5 can i make the same oil mixture? I usually run 4/5000 RPM with my family, but full gas in Race mode 😅
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05-09-2022, 06:42 AM #2
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Manual says to mix it 32:1.
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25two.stroke liked this post
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05-14-2022, 05:53 PM #3
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Agree and use good gas. We also used aces for extra insurance, they tend to blow up on us
1986 cougar mtr 21
2003 supra launch ssv
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05-17-2022, 12:31 PM #4
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I thought 260's where 40:1
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05-18-2022, 06:35 AM #5
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280's are 40:1, but the 260's call for 32:1. If you aren't turning it hard might get away with 40:1 but why take a chance? These motors are expensive to repair/rebuild!
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05-29-2022, 07:01 AM #6
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Just run 32/1. There’s no reason not to run the richer oil mix. I don’t understand why people want to skimp on oil
Erik Kiser
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