1988 mercruiser 4.3 core plug locations

[english steve]

hi guys,


I've found my doner engine for my bayliner has rotten core plugs was going to change them all as a precaution am i right in saying there is 4 ? or is there more hidden behind covers etc ???

 

[Bt Doctur]

(6) 2 in the back ,2 in the front and I believe 2 in the side of the block.