I have a 89 evinrude 70 hp that has been ruuning fine until yesterday now it will start and idle or run for approx. 5-10 minutes before dying out( it will stay running if u pump the bulb when it starts to die). well ive checked fuel, fuel lines, no leaks or obstructions in lines, oh vro is unhooked also , i premix, so i took fuel pump off and took apart , every thing looked good except for an oring that was torn into, it was the one that goes over shaft of piston so i replaced o-ring with one from auto parts store and reassembled every thing and it is still doing the same thing, so i guess my biggest question is can the fuel side be bad even if all components looked okay, talked to local mechanic who said once u take vro pump apart sometimes they do not work right then he told me a story bout not being able to get the reg fuel pump with 3 outlets anymore and that if i used a replacement with out 3/8" lines that it would starve for fuel and that all he could get was a replacement with 5/16 lines, also checked the pulse valve for obstructions and it was clear, does sierra make a replacement non-vro fuel pump with 3/8 lines anymore and does anyone know a part# ,any info on this will be greatly appreciated!
could pulse not be strong enough to operate fuel pump and how could i check that ? i do not have means to purchase a gearcase pressure tester like maxrules suggests so is there anyway to diagnose for sure that it is pump?
