I purchased my boat a few months ago. It is a older Stratos (1989 I think) and has a Johnson 150 xp. The boat runs really good, once you get it there. When I start the motor, and it takes a while for it to warm up, it goes into reverse smoothly but not true with forward. When I shift into forward there is initially nothing. It I shift back into reverse it seems to help it go into forward but not always. Eventually it will go into forward but sometimes it will then jump out. Once I get it into forward and moving it runs really good. What are the possibilities? Someone told me it could just be an adjustment on linkage. I am about to change the lower unit oil for season. Ideas on what I should look for and thoughts on what the problems might be. Also, thoughts on why the motor is so hard to get warmed up would be nice. If linkage can somone direct me to thoughts on linkage adjustment process.