Re: Force 125 maintenance question
Some other items to do in addition to those that JJ suggested: Replace fuel pump diaphram(s), replace LU gear oil, spark plugs, and water pump impeller. Impeller should be changed out every other season or about 50 hours or initially if you don't know the last time it was replaced. If you don't have the maintenance history, I would do all of the above to be safe.
Regarding the fuel/water separating filter, I installed one between the tank and the bulb (mounted it in the bilge) and then an inline filter between the fuel pump and the carbs.