Have the port head leaking water outside near combustion chamber on the third cyl down , Has 1100 hours , 6000 gals of fuel through it just went out of warranty , has new alt , lower unit . compressor . Is power head needed soon or will this thing last another 600 hours , do I need to think power head or new unit soon ?? . It pushes very heavy boat , not a lot of idle time . used devcon to seal head while wating for new head . still can see cross hatches in cyld with boar scope