Have an old 89' bass tracker 1800FS that had a 115-20" shaft on it and replaced it with a 1990 150 black max 25" shaft. The bulb does not stay pressurized upon stopping the boat and starting. Also it is really dog slow on the hole shot. Could this be a fuel pump? Also my ignition control box randomly has a load alarm sound to it. It will come on at weird times and then go off again, sometime i jiggle the key and it goes off. What Pitch prop should I be running on this black max? I took the one off the 115 and put it on, i think its a 19 pitch. The engine doesn't really get past 4500 RPMs.. it sounds good upon start and idle but is really slow on the hole shot and top end. My 115 outperforms it by far. Any thoughts?
