[BarryB]

Hi Steve,

I flush my 2 stroke Yamaha 70 the same way, never a problem. However, my motor only has 60 hours on it so far.

1. Did you run the motor at idle (same amount of time) in the water the same as when you flush the motor?

If not, try that. If you have the same problem, I would check the carbs or fuel pump.

2. Is the motor tilted different when you flush it vs. when your on the water?

If so, possible problem with the float system in the carbs.

3. Have you pulled the spark plugs?

If the plug tip and insulator is black, the motor may be running a bit too rich at idle.