Do I need to protect my outboards under the warm season?
Sure, warm season with humid, hard on unused equipment.

What about the ratio of mixed gasline?
Most motors will perform with 24:1 Ratio, Now fine on 50:1 after 1965 Year.

My motor runs rough. Should I add an additive to the gas to clean the carburetor? 
Only BRP Evinrude /Johnson Fuel System Cleaner is specifically made to do this safely. There is no other known additive that you can add to the gas mix that will clean an outboard carburetor. Automotive-type panaceas contain strong solvents and cleaners that will damage or destroy the components of the outboard fuel system. BRP Evinrude Johnson also makes a product that will keep a clean system clean - "2+4" fuel conditioner. I am certain there are equivalent products from the other motor manufacturers as well. If you do have a "dirty" carburetor, the only sure cure is to disassemble it and use approved cleaners to de-scrozz it.

How can I make my boat runing fast?
Guys, buy bigger motors, but that opens a can of very large worms. if you want to do pls let me know.

How long time should i relace outboard water pump
The modern outboard's water pump housings are stainless steel, impellers are of compounds that do not rot or deteriorate in salt water. With care will last a long time. There ARE 2 enemies. first - NEVER Start the motor dry - not even for a "couple of seconds". Water lubricates the pump, and a dry impeller is like a locked up set of tires in a panic stop! The pump will self-destruct. Second - abrasion - does the water you boat in have a lot of silt of murk in it? Do you hit a lot of muddy bars and sandy beaches? Ask around to see how frequently this environment in your area eats pumps and act accordingly. You should replace this impeller every 1 year in any case and definitely in an engine that has seen extended storage.