Is 1031 exchange possible with seller financing?

[Ray Hage]

Hi BP family. I put up one of my properties for sale and I received a verbal offer that I liked but the agent is asking if would be willing to accept 20% and interest only financing for 2 years. The buyer would then refinance before the 2 years is up. Frankly, I would be ok with that except for one thing that I am unsure of. Am I able to 1031 exchange any of the money (the 20% down payment?)  into another property to avoid the federal capital gains tax?