I am coming up with a new planet idea inspired by One Piece. I'm imagining a planet with the same mass, volume, and sunshine as Earth. The difference is that it is mainly an ocean planet. There are no large continents. Instead, there are thousands of islands spread across the planet that are roughly the size of Jamaica. The one exception is a huge mountainous continent in the center. Along the entire equator is a huge landmass that stretches 500 km both north and south. This landmass is filled with mountains but it also has many plateaus and a few jungles plus rainforests. This equatorial continent effectively cuts the planet in two; leading to two completely separate oceans. There is almost no land at the poles.
So given these conditions, what is the expected climate of this world? I think there would be conditions similar to the Pacific Ocean in both halves but the climate on each island could vary.