carbs

rasbury

Well, since you are my go to group, I have a carb that sat with ethanol fuel in it for a couple of years...engine will run but not rev. Carb is from around the 91 time period. I pulled the float bowl and the main jet and it seem to have some crud in it which I cleaned out,reassembled - engine fires right up but bogs when you try to accelerate it...anything obvious I can do to clean the cobwebs out? Ran great before I purchased a boat! I'm driving almost a hundred miles a day and my truck gets about 12 mpg and need this other carb to work. I guess just a rebuild kit and start from scratch?

212rowboat

i'd first guess vacuum leak... get a can of starter fluid in the aerosol variety... carefully spray starting around manifold and working out.... brake booster is a common culprit...

other than that.... may want to disconnect fuel line and run a jump to the pump (if electric)... wash the varnished fuel out.  hope the seals are good....  

rasbury

Well , to come clean it's a carb on an old sportster....so pretty simple,like a lawnmower...should have never that fuel sit like that...sigh... It's a 91 carb do figuring out the parts is a challenge!

zaverin1

Rebuilld kit and tune 
end of story 

rasbury

Yep...

212rowboat

Well... turns out I know something about that you may want to know.  

Those fellas have a hard time with a float vent needle valve.  Google it and you'll see the fix.  Bottom line is the atmospheric pressure can't equalize and fuel stops flowing butt cold... just to refill and release the bowls contents as it equizes.  Hence, it'll start.. it'll run... it won't run under load.  

rasbury

Thanks @212rowboat I will check that out and get a kit on the way and see if I can figure it out...