Geeze, I am stumped. I have several blowers and tried rebuilding 2-3 of them and keep getting issues with a leaky carb.
These are mostly Tecumseh engines in the 3-5 HP range. Here is what I have done.
1. Full cleaning of the carb. Carb cleaner spray with the carb off the blower. Main jet removed, needle valve removed, float bowl cleaning, compressed air in all passages.
2. New float bowl gasket, new needle seat (3 of them now) all with the groove facing DOWN - so grooved side first. I don't have the tool but use a drill bit to gently push the seat down. I place a dab of oil on the seat to ease it into the cavity. I push a little past a point of resistance and then it feels fully seated. I have tried 3 different seats from 3 different sources. None of them are genuine Tecumseh seats but they are all new. On the fourth attempt last night I used a q-tip with carb cleaner to clean the needle cavity - came back clean. I also installed a new needle seat.
3. New main jet gasket, new float bowl gaskets (3 different ones) and I adjusted the float level so the bowl is level with the carb body.
The machine will start first or second pull and will show no signs of leaking for 30-45 mins. I let this one sit overnight and by golly it's leaking again. I can see gas in the choke throat area. My thought is a slow leak and I can't help but think it's the needle or the seat.
I don NOT think it's the float bowl gasket since I can see the gas is very high in the choke throat. To me this indicates the bowl is flooding and gas is leaking.
The worse part is I don't think it was leaking before I attempted to clean the carb so I do suspect it's something I did.
Here is the style of carb I have. https://alexnld.com/wp-content/uploads/2015/05/SKU20116410.jpg
These are mostly Tecumseh engines in the 3-5 HP range. Here is what I have done.
1. Full cleaning of the carb. Carb cleaner spray with the carb off the blower. Main jet removed, needle valve removed, float bowl cleaning, compressed air in all passages.
2. New float bowl gasket, new needle seat (3 of them now) all with the groove facing DOWN - so grooved side first. I don't have the tool but use a drill bit to gently push the seat down. I place a dab of oil on the seat to ease it into the cavity. I push a little past a point of resistance and then it feels fully seated. I have tried 3 different seats from 3 different sources. None of them are genuine Tecumseh seats but they are all new. On the fourth attempt last night I used a q-tip with carb cleaner to clean the needle cavity - came back clean. I also installed a new needle seat.
3. New main jet gasket, new float bowl gaskets (3 different ones) and I adjusted the float level so the bowl is level with the carb body.
The machine will start first or second pull and will show no signs of leaking for 30-45 mins. I let this one sit overnight and by golly it's leaking again. I can see gas in the choke throat area. My thought is a slow leak and I can't help but think it's the needle or the seat.
I don NOT think it's the float bowl gasket since I can see the gas is very high in the choke throat. To me this indicates the bowl is flooding and gas is leaking.
The worse part is I don't think it was leaking before I attempted to clean the carb so I do suspect it's something I did.
Here is the style of carb I have. https://alexnld.com/wp-content/uploads/2015/05/SKU20116410.jpg
