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Old 07-11-2011, 12:56 PM   #1
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correct oil mix

Hi, i have a mariner 200 2.5v6 year 2000 carbed model, just wondering what the correct oil/fuel ratio i should be running it on should be?

Oli.
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Old 07-11-2011, 02:23 PM   #2
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I ran 40:1 Merc Premium Plus in mine. Some people use 33:1 but unless you're revving the hell out it there's no benefit, just more expense!
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Old 07-11-2011, 02:29 PM   #3
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Standard 200 should only be 50:1 on a good TCW3 oil !!
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Old 07-11-2011, 03:52 PM   #4
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32:1 On xr2 I'd run no less than 40:1
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Old 07-11-2011, 03:54 PM   #5
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Who mentioned XR2 ?
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Old 07-11-2011, 04:02 PM   #6
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thought it might be simular as there both 200hp, steel lined & carbed
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Old 07-11-2011, 04:59 PM   #7
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Different RPM's, CC's and probably a load of other stuff as well!
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Old 07-11-2011, 05:02 PM   #8
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Quote:
Originally Posted by Cookee View Post
Different RPM's, CC's and probably a load of other stuff as well!
Well I guess my post was about as useful as yours then lol
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Old 07-11-2011, 05:21 PM   #9
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i run 32.1 on quicksilver premium plus for piece of mind, revving around 6800 rmp, no smoke, screams like a banshee! its up to you what you feel comfortable with.
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Old 08-11-2011, 12:11 AM   #10
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Quote:
Originally Posted by Paul E View Post
I ran 40:1 Merc Premium Plus in mine. Some people use 33:1 but unless you're revving the hell out it there's no benefit, just more expense!
plus you are actually running lean if you over oil!!! 40:1 unless consistently above 7k
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Old 08-11-2011, 01:01 AM   #11
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Boat make: Ring 20, 17ft Plancraft Sabre
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i expected about 40:1, many thanks for your advice guys.

oli.
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Old 08-11-2011, 11:00 PM   #12
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I never run a large bored outboard ( 3.500" bore ) motor less than 40:1 . Never seen a situation where you make power or add longevity by short cutting a motor of oil...50:1 is great on the smaller bore sized Mercs
( 2.4/2.0 liter ) but not the 2.5.....

My rule of thumb on my 2.5's is :

8000 rpm or less mix at 40:1
8000 rpm or more mix at 32:1

I also NEVER run a fully syn oil in any steel sleeved motor only a BLEND and then after its completely broke in..

Jay @ JSRE
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