How Floaty should Carb Floats be?
Posted: Fri Nov 01, 2019 5:44 pm
How high should properly working floats float in a container of gasoline? I'm not talking about the wet float level in the float bowls, but the floats themselves, separate from the carbs, floating in gasoline...
See, I'm chasing down a fuel delivery problem on my newly rebuilt 1992 Seca II. Carb internals are new, except the floats themselves. New float valves and corresponding seats.
I am getting an intermittent fuel overflow condition on carbs/cylinders #1 & #2. I learned this after setting up an auxilliary fuel bag prior to syncing the carbs. It seems one minute I can confirm the wet float height just fine, and the next both #1 & #2 carbs show a wet level way way way above the carb bank itself.
It's at this point I remove the spark plugs and find abundant gasoline in #1 and/or #2 cylinder.
I'm beginning to think that there is perhaps a very small leak in the floats themselves, or at least one of them. After I take the carbs apart and inspect for anything crusty in the float valve/seat, it means they have been apart and dry for a couple hours on the workbench. When I put them back together, I check the wet float height and confirm it is fine. After it sits reassembled on the bike for a few hours with gas in the float bowls, perhaps at least one float becomes "water logged" with gas, preventing it from floating, thus preventing the float valve from closing.
Thoughts?
Anyone have pics of their properly working float floating in a container of gasoline?
See, I'm chasing down a fuel delivery problem on my newly rebuilt 1992 Seca II. Carb internals are new, except the floats themselves. New float valves and corresponding seats.
I am getting an intermittent fuel overflow condition on carbs/cylinders #1 & #2. I learned this after setting up an auxilliary fuel bag prior to syncing the carbs. It seems one minute I can confirm the wet float height just fine, and the next both #1 & #2 carbs show a wet level way way way above the carb bank itself.
It's at this point I remove the spark plugs and find abundant gasoline in #1 and/or #2 cylinder.
I'm beginning to think that there is perhaps a very small leak in the floats themselves, or at least one of them. After I take the carbs apart and inspect for anything crusty in the float valve/seat, it means they have been apart and dry for a couple hours on the workbench. When I put them back together, I check the wet float height and confirm it is fine. After it sits reassembled on the bike for a few hours with gas in the float bowls, perhaps at least one float becomes "water logged" with gas, preventing it from floating, thus preventing the float valve from closing.
Thoughts?
Anyone have pics of their properly working float floating in a container of gasoline?