Ty,
I've got a carb problem.Mine is a 750 double pumper with 4 corner idle and it has run flawlessly for over a year.All of the sudden half way through the day it won't idle anymore.It blubbers and dies but if I gas on it it goes like normal.I've already checked the needle and seats and reset the floats.They are normal.I also pulled the idle screws and blew them out with wd-40 under pressure.I only use the front idle circuit because that's what I'm used to.The only thing I haven't checked is the powervalve.Would a blown or bad powervalve cause this?I haven't had any coughs,sputters or backfires recently but with the fuels these days you never know about rubber parts.Please helpppp!!!I have a woman coming out next week and the boat must be up and running.