just wanted to post on my 200 that was overheating at idle ...took it back to the dealer 2nd time today and main mechanic i guess got talking, i went through all that it was doing idle speed and over heat, mentioned the new lower unit last year .. and he remember a similar problum in the past took calling merc that time .. well forwhatever reson theres a scpace between the water pump and the exaust that isnt sealed the fix rvt or whatever its called sealant applied between the 2 then reassemble .why it wasnt caught when the lower unit was put on last year i dont know but needless to say shes running fine now holding 136 - 140 at idle with 5 psi at idle ..just wanted to post the results incase it ever comes up again for anyone else thanks for the help guys