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Old 19-10-2009, 07:43 PM   #1
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petrol oil mix

Anybody know the petrol oil mix on a 75 hp 1985 merc.
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Old 19-10-2009, 08:07 PM   #2
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merc 75

yes that will be 50/1
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Old 19-10-2009, 08:32 PM   #3
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merc 75

Thanks driver 510
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Old 19-10-2009, 09:12 PM   #4
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what about a merc 2.4 i have been doing it at 100/1
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Old 19-10-2009, 09:23 PM   #5
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merc 2.4

i think 40/1 will be ok. at 100/1 i would think it will blow up soon
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Old 19-10-2009, 11:03 PM   #6
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Quote:
Originally Posted by rob m View Post
what about a merc 2.4 i have been doing it at 100/1
i really hope you are crap at maths
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Old 19-10-2009, 11:56 PM   #7
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Thats interesting, when I spoke to E P Barrus in the summer regarding my 1984 Mariner 150 they told me 100:1 for leisure use and 50:1 for commercial use. 50:1 seemed to smoke a bit and seemed to oil the plugs when manoeuvring under 1500rpm for extended periods. 100:1 sounded very lean mix and a little extra oil can hurt so I settled for a compromise of 75:1, seemed to run fine.
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Old 20-10-2009, 08:20 AM   #8
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oil mix

thats what you would run if you raced it
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