France, much changed from the side that beat Argentina in their first match, finally got their third try through centre Gael Fickou 13 minutes from time. Replacements Baptiste Serin and Jefferson Poirot added two more in the last 10 minutes.

The bonus win put France second behind England in Pool C ahead of Les Bleus' third match against Tonga in Kumamoto on Sunday, but Eddie Jones's England side may have few concerns after this French performance.

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Captained by veteran No.8 Louis Picamoles, France started with 12 changes from the side that won a cliffhanger against Argentina in their opener last week, with coach Jacques Brunel opting for experience over youth in key positions.

Yet for much of the match they played like they barely knew each other, with only the pinpoint kicking of Camille Lopez a threat to the Americans' defences.

A deft dink from the wily five-eighth in front of the posts set up winger Huget to run onto the ball and cross for the opening try in the sixth minute.

He later found his other winger Raka sprinting to the right corner with a sumptuous cross-kick for their second try in the 24th minute.

There was little else to buoy frustrated French fans as passes were spilled or flew wide and it was instead the Americans who were driving forward as they capitalised on French indiscipline through the boot of five-eighth MacGinty.

It took replacement halfback Serin to stop the rot and his decision-making proved key.

He hurled the ball wide from a ruck five metres from the line and Fickou celebrated his 50th cap by bursting through two defenders to score in the 67th minute.

Moments later, Serin scampered away from the wearying Eagles to seal the match and cap a brilliant cameo.

Reuters