-Treasure Island-Chapter 22-

Bored and scared of the blood and bodies, Jim decides to leave the compound to look for Gunn's boat, although the knows that it is against the wishes of his comrades. As he sneaks to the anchorage, he sees Long John Silver in a smaller boat beside the larger Hispanolia, speaking to two pirates who are onboard. Suddenly, Silver departs and the two men on board go down to the cabin.

Jim finds the handmade boat under a tent and near a white rock. Interestingly, the boat is small and light, portable, and is a wood framework covered with goatskin - Jim calls the boat a coracle. Deciding that the pirates will soon take the anchor up and wanting to stop them, Jim decides to cut the Hispanolia loose and merely let it land anywhere the wind and current take it, thereby stopping the pirates.

Which character do you think has most influence on Jim in treasure island

Jim headed on his own because he knew that his partners won't allow himself to go and he wanted to go to Ben Gunn's boat that's why he left his partner alone and he also didn't wanted to risk his partner's life, although he knew it was against his wishes. His rationale of escaping was to get to Ben Gunn's boat.