What do I have?

[FastCat04]

Serial # A913415 is on the motor clamp/external tag. But it apparently powerhead has been swapped out and I need help identifying it please.
I don't see any id info such as 3 1/8" or 3 3/8" tags/castings or id tags on PH. Can you tell what this is (pics below)

[FastCat04]

Few more with stamping #'s

[JOE54]

that is a late 70s early 80s model vertical reed mtr on a later model mid section, could be 200, 175,150, the wh 7 carbs came on 81 mod 175 prob what powerhead it is , 2.0L MTR, becareful no over temp sensor on stb head, I got some goodies for that one

[FastCat04]

Thank you JOE54 !!!! Is there any other way to tell a 2.0 from a 2.4 other than checking cylinder bore?

[FastCat04]

What kinda goodies do you have?

[JOE54]

give me p/n on the heads stamped on / I got a 2.4 liter 200 power head

[FastCat04]

No #'s stamped to either head. I've searched them both over. But there are a few cast in #'s, but I know those usually aren't helpful. See 2 pics below

[JOE54]

those are the numbers I was looking for found 79715 on 150 don't see 79714 still believe its 175, is there no ser plug in top of block

[OnTRAK]

The build date is showing it is a 1981 motor. The WH-7 carbs came on the 175 hp 2.0 liter motors according to the Mercury factory service manual I have. Just as JOE54 says.

[FastCat04]

Thank y'all for the info ! Boat was free...so I can't complain. Sure was hoping it was a 2.4l 200hp as the mid-section indicated. But when I saw the Mariner colored powerhead and orange hi-temp silicone around the adapter plate....I knew it wasn't original. LU has also been changed to what looks like an older version of a Sportmaster. Possibly a CLE ? Wanting to put an impeller in it...so maybe? the impeller is the same as the original '86 mid-section takes... (see pics)