Brown expressed "serious concerns" about Honda's capability in F1, following the news it would not be bringing an update to Canada because it was not yet ready. Maybe they are thinking Honda can make it in the future but we need to convince them by showing them.
"Things need to change quickly and we won't go into 2018 in the same situation we're in now, or we won't go into 2018 with anything other than validated performance gains".
This has prompted fresh speculation that McLaren could move to end its partnership with Honda early and switch to either Mercedes or Renault engines from 2018.
"It is very unfortunate we can't convince them that we can do that", he said.
"I was not surprised", he continued, referring to Brown's comments. "If we say here and said "life's great", everyone would be wondering why I haven't been fired yet".
Formula 1 technical and sporting boss Ross Brawn has offered to aid Honda, who have been described as "lost" by McLaren, and it remains to be seen if the engine providers are willing to work with him. "This is a very hard, a tough situation".
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"But I am confident we are not lost", Honda's Formula One chief Yusuke Hasegawa told motorsport.com at the Canadian Grand Prix.
Sauber team principal Monisha Kaltenborn said in Montreal that she was aware of McLaren's latest remarks, but insisted that they did not cause any undue alarm about its own situation for next year. "But the things we can do is trying our very best for the team and we are still aiming to go the same direction".
Hasegawa said Honda has not been given a deadline by McLaren "at this moment" as to when it needed to prove performance but it plans to introduce an upgrade as soon as it is proven on the dyno.
"We value Honda as part of the sport and if we can do anything to support their efforts to improve for the future we will do that".
When asked about Brawn's comments, Hasegawa said: "I didn't know that, but I'm very happy to have that".
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