Outboard vapour lock

[Mad_On_Fishing]

So I bought this boat last week and unfortunately it's impossible to troll with the 100hp so i usually just go out to my spot shut it off and jig. Cold starts aren't bad and it idles very well however if i turn it off once its warm and dont start it for 5+ minutes it takes a lot to start. I try pressurizing the line and it still takes well over 4 minutes to get started and even then it does not want to idle. In fact yesterday I was out past the provincial park and nearly got stuck in a thunder storm.

I'm thinking this may be due to vapour lock. It's a 1989 johnson gt100.

Has anyone else had a similar issue? And has anyone found a way to solve this? Am I missing something?