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#1
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how to tell a merc 2.0, 2.4, 2.5 apart visually ...
going to look at another motor on the way home today. how can i tell visually if it is a 2.0 or 2.5 motor?
is there anything i can look for so i am sure what motor it is? thanks 
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#3
07-22-2008, 06:56 PM
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yeah . . . I could write a book here. What years are you talking about? It should be pretty obvious.
Heads, carbs, intake, serial number, decals, block difference 2.0L vs. 2.5L (buldge . . . 92 and later). Search screamandfly.com or get a factory manual. Can't the owner tell you what he's selling???
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#4
07-22-2008, 08:13 PM
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no .. all owner knows is that it is an 89 mariner 150 25"
it seems that most people out there do not know what they are selling. i am finding it very common. i have had people give me the wrong year ... some off by as much as 10 years .. maybe that was on purpose  the only number i can find on the motor is very hard to read .. i think it reads 06139606 these numbers were on a tag that is sort of worn off.
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#5
07-22-2008, 09:10 PM
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serial number is also on a freeze plug on the powerhead . . . also check the date on the starter (keep in mind some starters have been replaced). 92 (serial begins with "0D") was the first year of the 2.5L and 91 was the last of the 2.4L. 1988 and later 2.4L should have 1pc heads. Generally speaking the 150's were 2.0L except xr4, xr6, Mariner Magnum II/ III. 2pc top hat style heads (1983 - 1988) 135/150's will have a stamp 3 1/8 and 2.4L will have 3 3/8.
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#6
07-22-2008, 09:16 PM
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OC would be around 89 or 90.
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#7
07-22-2008, 10:05 PM
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Quote:
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