need help with 1992 115 mercury hard to start and over heating

twopunches

Cadet
Joined
Sep 28, 2009
Messages
13
HI,
i have a 1992 mercury 115 4 cyl 2+2.I'm having a couple of issues i cant figure out .
#1 after running the motor 5-10 minutes high rpm heat sensor alarm comes on.slow down to idle goes off.i have a strong steady pee.Ive changed the impeller.while the alarm is on Ive disconnected the heating sensor the alarm goes off.
#2 the motor sounds different than when it was running with no problems.sounds
almost as if the choke was stuck on.its not.after running the motor and cutting it off i have a hard time starting it up. i have a big puff of white smoke when it does start and another few minutes to run the carbs to where it would run at idle Ive put new plugs, plug wires.Ive checked my floats in the carbs.changed one ,the tab was broke on it.still didn't run right. if i could get some input it would be greatly appreciated
thank you
 
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