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  1. #1
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    Please confirm this says what I think it says - block engine stamp



    I believe this on a V6 block would indicate a 135 hp - maybe a 2.0 lt??

  2. #2
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    I've never seen "AA", but I don't mess with 135s either. Does it have a serial number?

  3. #3
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    AA usually means 150 2.5 carb non xr6
    '95 STV "The Blue Goose"

    Top Speed 136mph (curtesy of Hurricane Irma 9/10/17)



  4. #4
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    Sn 0g654194 thanks

  5. #5
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    Serial comes as xr-6 MagIII, but parts list show 2.0 pistons. Something don't add up. Does it have a 4 1/4 or 4 3/4 lower unit?

  6. #6
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    "Something don't add up" I intend to buy this PH which is offered as a 2.5lt 150hp, to complete a spare fishing motor - I started poking around on SN # and saw the 2.0 lt piston info also - got seller to send me block stamping letters (photo above) - I do not want a 2.0lt engine nor a 135 hp so trying to confirm what this is.
    Lower diameter - easily swapped so I don't want to depend on that for ID.

  7. #7
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    I think id buy some head gaskets and pull a head to be sure. These Mercs are confusing to say the least
    1988 Hydrostream Valero V, 135 Mariner soon to be XR2
    1985 Beretta ( based off GT150 Glastron ) V4 115 crossflow premix 17p SRX

  8. #8
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    I bought a 150 a few years ago. Thought for sure it was a 2.5. I was wrong, turned out to be a 2.0. LakeFever is right. Only way to be sure is pull head.

  9. #9
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    The 2.0 had 8141 rods in it too

  10. #10
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    My 1995 135 2.0 has the AA stamp on block also...i always thought or was told that it was a 2.5 block with 2.0 sleeves and pistons.
    1989 17'6" Champion Bass Boat
    1995 135 Mercury
    60 mph @ 6100 rpm's

    1995 19'0" Champion bass boat
    1995 200 XRI

  11. #11
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    Maybe its one of those fat blocks?
    1988 Hydrostream Valero V, 135 Mariner soon to be XR2
    1985 Beretta ( based off GT150 Glastron ) V4 115 crossflow premix 17p SRX

  12. #12
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    I've seen the AA stamped as both a 150 2.5 and a 150 2.0 (Fat Block)... pretty much have to yank a head to know for sure...
    Mike Nass
    Haulin Nass RaceBoats (HNR)
    www.haulinnassraceboats.com
    e-mail - MikeNass@shaw.ca
    phone - 604-230-4835

  13. #13
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    pretty sure tha only 2.5 150's were either XR6 or efi till tha 2.0 liter went away...…...

  14. #14
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    From what I thought I saw they made 2.0 lt up thur 2000 ?

  15. #15
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    According to Mercury engine serial number states, 1997 MERCURY 150XL 2.0L Carb Offshore

  16. Thanks CircleHook thanked for this post

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