Thats right folks i got me a pontoon boat now and the fun begins again.For those who don't know why the title of this thread is what is just check http://forums.iboats.com/showthread.php?t=236670 Any way I need help again only this time with a mercury 90 horsepower 6 cylinder.First problem i have is i can't figure the year out. The number on the serial tag is 0b107946 but i am not sure if it is missing a number on the front due to some wear the sticker.The other problem i am having is well it run fine at the house in a tank other than a random miss.Of course it was onlt ideling at the house.I took it out on the lake for a test run and the miss seam to go away but it would stumble real bad if you tried to full throttle.at 3/4 throttle is was doing ok but after trying the run it out theory of a friend of mine(which means try to clear it out by full throttle it and hope the stumble goes away)well it started missing and won't idle.after changing the plugs it stopped missing when you throttle it out of gear(couldn't check in gear or full throttle due to it was back in the tank at the house)but it still doesn't idle.if you press throttle only and just barley give it throttle it will run smooth.Any ideas on what to try.Thanks