I have a 1994 8HP 2 stroke Yamaha on my boat which is berthed in a marina. I am planning to replace it with a new one due to it is getting a bit tired/old like me and with ongoing cooling issues (blockages-overheating-stoppages,disengagement on gears, etc).
I am asking for some advice please:What would be the best path to take from the following :
1- Replacing it with the same spec brand new Yamaha 8HP 2 stroke?
2- Replacing it with a 8 HP 4 stroke Yamaha ?
3- Replacing it with a 6HP 4 stroke Honda? (I am told Honda does not make 8 HP anymore)

I need extreme reliability because most of the time we will be using the engine more than we used to . (Rather than full blown sailing - why? - simply getting old !)

I would appreciate some advice from people out there who went thru similar search/experience before .
(If there are other options out there please also let me know)
Thanks.