The reigning F1 champions said that "quality issues" would mean the new power unit would now be used at the next race in France.
The decision affects also Williams and Force India as well as the works team. As with Schumacher before him, he looks to have mastered heavy braking and acceleration on the circuit's long straightaways that lead into tight chicanes.
Rival engine manufacturers Honda and Renault are pressing ahead with planned power-unit upgrades this weekend. This was because, new parts were required to fix an engine problem that the Australian suffered in Monaco.
"I've enjoyed some great races in Canada and I won there in 2006, so it's a special place for me".
"There's some tricks to the track, but it's a great track, there's a lot of over taking possibilities, so it is a good show."
Asked about his driving style on Thursday after arriving in Montreal, he said, "I get really exhausted of all the questions". It is yet unclear if Ferrari are also planning an upgrade or if they will wait to introduce it at a later race.
The big loser could well be McLaren who have been the slowest in a straight line throughout this year and are unlikely to make up that deficit in other areas.
The return to Canada will also mark what many hope will be a return to action with the high speed Montreal circuit offering the possibility of more drama and racing than the Monaco Grand Prix procession led from start to finish by Red Bull's Daniel Ricciardo.
In the morning session, Williams driver Sergey Sirotkin spun and hit a wall, but was able to continue.
"It is of course Lance's home race, and also where he scored his first Formula 1 points past year in his rookie season, so it holds good memories".
Mercedes are leading both championships after six races, with Lewis Hamilton 14 points clear of Ferrari's Sebastian Vettel. Don't forget throughout 2018 GiveMeSport has joined up to the new F1 fantasy game with our own public league for you to test your wits against us!
From the midfield, expect Esteban Ocon, Carlos Sainz, and Pierre Gasly to put in a strong performance and complete our quintet.
They said that the engine was not doing more miles than intended.