Add Force is jittery for Client but not server

Hello,

In my prototype I’m adding force to a boat pawn to get it to move under control of a character. It works well for the server but not for the client. The client is really jittery.

This is the server

This is the client

I am using timers at the moment when w is pressed it activates the timer and the runs the logic over and over until s is pressed which clears the timer and starts another one to begin the deceleration process. Eventually I want to make it like a throttle but I wanted to get this problem situated first. Any help would be appreciated!