912ULS vapor return line check valve

[Dave S]

Jim & all,

I stand corrected, I should not have included the term "vapor" in the original post. ( Also sorry for the misspelling of "return" on the original subject line.)

Rotax simply calls it a return line; and, yes, it also solves the old problem of the original non bleed installations where the captive pressure between the fuel pump and carbs could rise drastically with a hot shutdown in the summer resulting in flooding of the carbs in a hot soak situation. Previously I solved this by opening the oil inspection door on the top of the cowl and letting the thing sit for 10 to 15 minutes before trying to start it again when it was really hot in the summer time. That problem used to be compounded if a person had "winter" formulated auto gas in the tanks on a really hot spring day (no need to ask how I am aware of that).

Overall a good improvement for the engine with the orifice and return line. No more hot start embarrassment.