Fernando Alonso wants McLaren to move quickly on the Honda problem
McLaren spent nearly two decades running a Mercedes engine before switching back to Honda for the 2015 season.
But they have not finished better than fifth since doing so and their pre-season testing was dogged by reliability and power problems attributed to the Japanese engine.
Two-time world champion Alonso failed to hide his displeasure in Barcelona at being as much as 20mph slower than rivals on the straights but this week refused to be drawn on whether Honda would see their contract with the team torn up.
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“This question is better addressed to the leadership of the team," said Alonso, as he prepares for the season-opening Australian Grand Prix.
“Of course I am aware of the rumours, but I try not to pay attention to them.
“It’s frustrating that after two years, everyone is moving forward and Honda is where they were two years ago.
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McLaren's new-look orange car has not delivered the pace promised by Honda
Fernando Alonso's current deal at McLaren expires at the end of the season
"Let’s hope we can fix the situation — I asked the team to react strongly and very soon."
McLaren are under contract with Honda until 2024 but the deal is understand to include a number of break clauses, one of which could see the partnership ended before the 2018 season.
According to the BBC, the Woking team have held informal talks with Mercedes about a deal to supply engines such as those they have with Williams and Force India.
And while Alonso is in the dark over any new engine deals, he knows McLaren cannot afford to waste time dithering.
“I don’t write anything off,” Alonso added.
“We are not here to wait four, six or eight races to improve the situation.
"That’s how Formula One works – it’s not a charity.”