my rinker has twin mercury 5.0 efi with 125 hrs the engines and just had major problem with fuel system getting clogged from paint flaking/peeling off the internal filter box assembly. mercury has so far been reluctant to admit this is a design issue and address the problem. so if you have a no-start condition or engine wont take a load and pump working, filters changed, etc. then you may have this as well. if you change filters and you have black specks/discoloration in the little white filter below the cartridge filter you may have a problem. maybe painting the internal box with a paint that may not stand up to the ethanol added fuel exposure should have been thought thru little more. anyone else have this issue? this is an expensive repair and wonder if the other engine is a ticking time bomb waiting for it to clog up...thanks.