25thmustang
Lieutenant Commander
- Joined
- Mar 20, 2008
- Messages
- 1,849
I assume someone will be able to help, but I am coming up without any 100% confident answer.
I purchased a used 1986 Cruisers Inc 26 Holiday that I am 100% sure had a repower done (from an OMC to a Mercruiser). The engine is closed cooling and on top of the heat exchanger it says 350 MAG. I assumed it was some variation of a 350 (260 hp). It has an Edelbrock intake and carb, which is not a factory set up. On the back of the block it is stamped GM57L, which online some say could mean 5.7, others state it could be a 5.0 or 5.7.
The Mercruiser serial number on the other side of the block near the starter says B964840 (I assume it is 0B964840 without the first 0). I have typed this in to a couple we pages that deal in Mercruiser. Mercruiser Parts says 200hp 5.0L (2bbl), however under that it says 200/5.0L/LX 260/5.7L MAG Alpha... with that said, the serial number range for this engine ends with 0B774444, whereas mine is a higher number.
Another web page gives ranges of engines and mine could fall into a few categories, from
I purchased a used 1986 Cruisers Inc 26 Holiday that I am 100% sure had a repower done (from an OMC to a Mercruiser). The engine is closed cooling and on top of the heat exchanger it says 350 MAG. I assumed it was some variation of a 350 (260 hp). It has an Edelbrock intake and carb, which is not a factory set up. On the back of the block it is stamped GM57L, which online some say could mean 5.7, others state it could be a 5.0 or 5.7.
The Mercruiser serial number on the other side of the block near the starter says B964840 (I assume it is 0B964840 without the first 0). I have typed this in to a couple we pages that deal in Mercruiser. Mercruiser Parts says 200hp 5.0L (2bbl), however under that it says 200/5.0L/LX 260/5.7L MAG Alpha... with that said, the serial number range for this engine ends with 0B774444, whereas mine is a higher number.
Another web page gives ranges of engines and mine could fall into a few categories, from