F4A won't idle

[wrecker_]

I have a yamaha f4a that has been sat for a while which doesn't idle. The throttle needs to be kept around or above the start position to keep the motor running.

I cleaned out the Carb and removed the jets apart from the smaller one as I didn't have a screw driver small enough. The engine doesn't seem to be running as rough but it still won't idle. Does anyone have any suggestions on what the issue may be?

[99yam40]

I have a yamaha f4a that has been sat for a while which doesn't idle. The throttle needs to be kept around or above the start position to keep the motor running.

I cleaned out the Carb and removed the jets apart from the smaller one as I didn't have a screw driver small enough. The engine doesn't seem to be running as rough but it still won't idle. Does anyone have any suggestions on what the issue may be?

I would think the smaller one would be the idle jet.

but running the whole carb thru a heated sonic cleaner would be my thought.
taken all apart before going in