I just recently replaced manifolds risers and elbos on my 2001 Searay 280 sundancer with twin 4.3 EFIs with 250 hrs. I bought the boat used a year ago and don't really know how the original owner maintained the engines. The passage ways were very rusted and changed out the parts at the recomendation of my marine mechanic. I run in saltwater and wanted to know if it would be feasable to convert engines to fresh water cooling after this work. Will the engine block have too much rust accumulated to clog the cooling system or am I better off being more diligant in flushing the engines. Thanks for the imput.
