Long story short, trying to help my father in law with an issue he's having with his boat. We suspect he's got a bad computer. We want to try to swap computers to see if that's actually the problem.
He's got a 496Mag (375HP) and I have access to a 496HO (425HP) computer with the same part number (885557) we could swap out. However, I've read that the HO computer programming is different and will not run on the Mag, which makes sense. However, he said he spoke to Mercruiser and they say the computers can be swapped and the programming is the only difference between the two engines, which doesn't make a lot of sense.
I was under the impression the HO has a different cam and a couple of other things. In any case, can we really run the HO computer on the Mag? I'm thinking no, but anybody know for sure?
He's got a 496Mag (375HP) and I have access to a 496HO (425HP) computer with the same part number (885557) we could swap out. However, I've read that the HO computer programming is different and will not run on the Mag, which makes sense. However, he said he spoke to Mercruiser and they say the computers can be swapped and the programming is the only difference between the two engines, which doesn't make a lot of sense.
I was under the impression the HO has a different cam and a couple of other things. In any case, can we really run the HO computer on the Mag? I'm thinking no, but anybody know for sure?