Decoding Horsepower by S/N

[littlehero]

Hi all,
I'm looking to repower my 2000 Chap 240 Signature and am trying to decode the horsepower on the old engine. S/N is 0L689274, any assistance is much appreciated.

 

[matt167]

350 Mag MPI

 

[Fun Times]

Your serial number comes up as MERCRUISER 350 MAG BRAVO MPI Gen+ model number 4442067N1 at looks to be 300HP as mentioned on page 1B-8,

https://www.justanswer.com/uploads/ROCKETBOAT/2008-12-14_034006_24b1r1.pdf