I had a shop do the impeller change on my 85hp Force last week. $75.00, not bad. I could not wait to get it out & try out the "add-a-tell tail" duel exit I installed. When I got the boat it came with 2 plastic 6 gal. fuel tanks, 1 brand new with gauge & 1 older one. I have used both with no problems. I splashed it around 4:30 Sat. afternoon, I didn't have much time before dinner & only wanted a quick test ride & figured Sunday will be all day ride. I only had fuel in the older tank (only use this one for back up), & didn't have time to get gas & oil for new one. I fired the motor up at the dock, a little harder to start than usual, but no big deal. Idled out of no-wake zone (tell tail looked strong) & opened it up--- Nothing. The motor just bogged down & stopped. It did this every time I started it up & then gave it the gas. It started every time, just would not go. It has run perfect every time I had it out since I got the boat. So, I get back to the dock to have a look (no idea what I'm looking for) & got the call "come home, time to go". Bagged it & thought, I'll figure it out tomorrow. I thought it may be the fuel pick up tube in the older tank so Sunday Morn. I got fresh fuel & oil in the new tank. Went up the lake, splashed it, fired right up, idled out, gave her the gas, Nothing. Same damn thing. It did this several times. I pop'ed the cover off the motor while my son worked the control's & I watched to see if anything looked out of place or not working correctly. Don't know why? I don't know anything about o/b motors. I thought the choke was sticking. Anyway, I kind of worked the throttle at the bottom of the motor by hand a few times to get RPM's up a bit & then I was headed in to bag it again. I gassed it one more time & WAM! there we go. right up to speed & RPM. Ran for the rest of the day no problems. What could it have been? Something in the fuel line from the old tank? I drained the old tank & used a strainer, the inside was just as clean as the new tank. Ever hear of this type of problem? I hope it was a 1 time thing. MAXX