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    2.5 & 3.0 id confusion

    My bad! The RA code was used up to 89 for 3.0s. Looks like maybe a variation in 87! Thanks for the input. Apparently the serial tag is in conflict with the code letters stamped on it.
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    2.5 & 3.0 id confusion

    So according to the RAstamped at the end of the number by the distributor, this is a 140hp 3.0. RA code was used from 74 thru 87.
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    2.5 & 3.0 id confusion

    I'll go check that out. I hadn't noticed them.
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    2.5 & 3.0 id confusion

    That's why I'm confused. 1 motor is tagged as 74 thru 77 2.5. But it has a balancer. Thev85 motor has the head off .so there's no doubt about that one. Are the cid # in the casting?
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    2.5 & 3.0 id confusion

    The appear to be factory tags/rivets
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    2.5 & 3.0 id confusion

    I have read a couple of discussions on here about how to I'd which motor is which. One says 3.0 has harmonic balancer 2.5 does not. Have an 85 sea ray 2.5 according to the bore size. No balancer. Picked up another replacement engine that appears to have been rebuilt at some point. The tag on the...
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