Yep, floats will highly likely be the culprit. You'll need to get in there with some cotton buds and clean them out thoroughly.
A little Brasso on the tip will help clean the float needle seats up, but don't go mad. Make sure the rubber tip of the needle is in good condition too.
_________________
Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
Check us out on Facebook! Please "like" our page!