I have a Zama diaphragm carb from a Troy bilt trimmer. Factory guy said repair seat or get a new carb. Some one knows how to do that task and I sure would appreciate the knowledge! Thanks nmiller1
Garden - Mtd - 25B-520D200 CA Gas Lawn Edger
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Answers & Comments
Either 2 or 4 screws on the bottom of carb, remove them and the cover and you will see needle and seat. Remove one screw and needle will come out, There is a small spring under needle idler arm, do not lose it...
Be sure to mark which fuel lines go where before removing carb.
I've never heard of reworking a needle seat. It would be a lot less agravation to just buy a new carberator, unless you just enjoy fooling around with this stuff. Errrrr, those carbs cost about 35 bucks.
I had the very same problem. Here's what i did. I used a samll drill and by hand, turned it on the bottom of the seat untill i could see a shiney mark all the way around the seat. Kinda like polishing a valve in. This worked great for me, but i did have a larger carberator to work with. Go slow and only take enough out to see a shiney spot all the way around.
I have no leaks, and saved 175 bucks for not having to buy a new carb.
good luck