What Mercury Power Head do I have?

skutsch

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Jan 24, 2015
Messages
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Ok so I picked up a bit of a rare bass boat, and it has a 135 Mercury Black Max on it but when I picked it up the seller said, "I think somebody swapped the powerhead cause its pretty fast" So here are the numbers I got off the motor and I am trying to figure out what I have.

Serial Number on the ID Plate (near the transom mounting brackets): 0A957475
Number on the Frost plug on the port side cylinder bank: 5904475
Number stamped on Starboard Heads: 1026-7261
Front of block below the flywheel: 95785
Port Side behind timing advance arm: 030281 (I assume this is the "born on" date)
Relief Valve Plate: 65663
On the block between power packs and heads: 7914 or 7974

Thanks in advance for any help you might provide!
 

Fun Times

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May 16, 2009
Messages
8,776
Ok, so teach me to fish... what numbers lead you in that direction?
Using the serial number on the frost plug shows it to be a MERCURY - (150 H.P. (1980) Serial No: 05904475 Model No: 1150620 Parts Catalog No: 90-818855
2.0L 150 ELPT
PARTS CATALOGS
  • 818855 - 150 H.P. XR-2 MARATHON MAGNUM (V-6)
Your number on the transom comes up as an MERCURY - (135 H.P. (1986) Serial No: 0A957475 Model No: 1135726 Parts Catalog No: 90-13752
MERCURY 2.0L 135 ELPTO
PARTS CATALOGS
  • 13752 - 135/150 H.P (V-6)
 
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