My 1978 Johnson 85hp (Model# 85ETLR78C Serial # J8004158) does not want to run properly on cold starts. I need to constantly use the choke to keep the motor running. It starts and revs to about 1500 RPM and then will slowly die.Choking when RPM hits 1000 keeps the engine running and RPM goes back up to about 1500 - 1800. I may need to choke the engine on a hot day 10 -12 times before it will run without stalling. No other problems at all.<br />Carbs repaired with new floats and needles.