Sometimes the needle gauge on my Yamaha SHO 150 is slow to respond. When I press the trim switch on my hand throttle the needle works fine sometimes, other times it doesn't move right away and then a little while later it responds. If I push the switch on the engine with my finger up and down it seems to respond fine.. Do you think it might be the gauge or the sender or is this late response normal. Thanks. I'm just wondering if any one else has had this problem.