McLaren racing director Eric Boullier has confirmed Honda are looking to provide a customer engine in 2018.
There are strong rumours that Sauber will ditch the old Ferrari engines in favour of a partnership with Honda from next year onwards, and Boullier has said McLaren will help them achieve their goal.
"We will provide support in finding a customer," Boullier told German publication Blick.
"This year, Honda would not have been able. Everybody would have been weakened, but now things are different.
"But we have to make sure it’s not detrimental to our partnership with Honda.
"Whatever happens, we are partners, so at some stage there will be a second team, and I think we will have to support this."
However, Boullier has stressed that both McLaren and Honda's quest of getting to the bottom of their problems remains the number one priority.
"I think we have a more or less clear path where to go," he said. "I think we have something falling into place.
"We need first to have this recovery plan.
"Three years in a row being where we are, it’s not possible now. We have to break through and step up.
"Then we can let’s say focus, or decide on another team supporting us."
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