i spawned the first version of the truck in with the boat and it seems to work for me
https://imgur.com/a/skzqg1A

and sadly I cannot make the boat go faster without complete redesigning it. and now with a full time job I simply just don't have the time. though I appreciate that you like my vehicles!

all you should have to do is 1. flip the over head breaker 2. then put the throttle atleast a little bit up so that its not at 0 3. then turn on the starter for a few seconds and then turn it off after the engines turn.