I have a 85hp suzuki out board that is real pickey when it comes to any air in the fuel filter. the guy i bought it from said it wont run with air in it an i have tried every thing to get it out but cant. the boat runs perfect at 23mph, it will run all day at that speed if i put the hammer down it will do about 35gps any where from 1/2 mile to 3 miles then all of a sudden it sounds like it is bogging down and it slows down untill it comes off plane. i know this can be a number of things and yes i just rebuilt the carbs and fuel pump. while chaseing ghosts in the system i was thinking the in line fuel filter could be a little too big and that could be part of the problem. then I started to think why is it necissary to have a in line fuel filter? it's job is to catch any particles to keep it out of the carb, but nothing should get past the 5 micron filter in the fuel water seperator! My system is like most, fuel tank to water seperator to prime bulb to inline fuel filter to fuel pump. if the water seperator can catch and filter out invisable partilces of water it would catch any thing that would be large enough to clog a jet in the carb so why not eliminate the fuel filter all together and have one less thing to replace or that could cause a problem? i didn't even think about it untill now but i did what most of us have been trained to do, the boat came with a fuel filter so we keep it there and never ask why we just spend the money from time to time to replace it and keep doing it that way because that is how it has allways been done. I can see where you would need it if you didn't have the water seperator but this is just double filtration double resistance on sucking the fuel and one more thing to cause problems. what do you guys think?
