My 1969 (I think) 35 twin merc resently started missing whenever I open up the throttle, ran for a while a low speed finally died and would not start.(first time out this year) Cleaned gas filter but it ran only a short time and would not start again. It was suggested that my priming gas line was shot the rubber was disintergrating and the rubber was clogging the filter plus too much air was getting in. I did notice when squeesing the bulb it never got hard. Is this possible? I know the clamps seem to keep cutting into the rubber and the old gas from last year was almost black for some reason or other.(I did not use last year gas)I am sure a new hose would be in order but my question is would a bad hose cause the lack of fuel to the engine? The boat gets very little use but has always ran great.<br />Any ideas,Richard