Well, the problem isn't new. Two factors:
1) After handling my coolant problem I can now fly at full power indefinitely (at least until the tank runs dry). At continous full power steep climbs is where the problem has shown up. Also the handful of times when the engine quit on me after reducing power while entering the pattern are now better explained.
2) Replaced the fuel line from pump to carbs enabled me to see the bubbles in the line and know why fuel pressure would drop.

I finally got curious enough to investigate and experiment.

Finn

Russell Duffy wrote:

> Can the explanation be that the sudden change in velocity/pressure
> caused by such a restriction cause the fuel to boil (evaporate)?
>
> Finn

 

Is this fuel flow sensor new?  It sure does seem too small to me, but if you've been using it for years with no problems, then why would it cause a problem now?  

 

Rusty (rain today, fly tomorrow)