1993 merc xr6 150 stalls

[dave2092]

I will try to make short. Had motor on muffs a few weeks ago ran good. Put on the river fired right ran great. Steering cable snapped. While parts were on order replaced carpet. Tripped kill switch while doing carpet. parts came in dropped off took few days to fix cable. Got boat back cool beans. Went fishing next morning no start cranked for a while nothing. I forgot about kill switch must have flooded pretty bad would not start at all. took home replaced plugs let sit till next day. took back to river fired up after few cranks. boat ran great got on plane about 3/4 throttle nice. all a sudden stalls. total loss of power. turn key silent nothing. few seconds later turn key one click nothing wait few minutes starts up but running really ruff like on 5 cyc. Get back home wtf. check plugs loose wires nothing seems wrong so next day take back to river same exact thing I mean it stalled in exact same spot on river about 1 mile up stream both times. may fuel, elec, overheating. did hear faint hissing from powerhead but went away quickly. any help.also hear are picks of 3 wires just hanging out lookes at wire diagram looks like temp gauge sender ?? shouldthese wires be connected

 

[smash78]

First thing i would be doing is checking compressions