1978 1150 no fire when colder than 60 degree

[jeast]

my 1978 mercury 1150 with the thunderbolt ignition,it seems to have no spark when it is colder than 60 degrees outside temerature. anyone heard of something like this or what could cause such an odd problem.

thanks

 

[Faztbullet]

Re: 1978 1150 no fire when colder than 60 degree

I had a customers doing some thing like this, it was a bad coil( dist ignition)
if yours is ADI (2 packs) check/disconnect mercury filled kill switch above packs. If this fixs it ,replace it...do not run with out ..safety issue!!!

 

[jeast]

Re: 1978 1150 no fire when colder than 60 degree

thanks, i have unhooked the ground on the mercury switch, no difference.

earlier today it was around 60 or so and it started on the first crank. 2 hours later when temp dropped nothing.i put all new wires inside except for the stator.
this moter had set a year oe so recently before i bought it. could it just need ran to clean contacts in the switchbox or something?

 

[JB]

Re: 1978 1150 no fire when colder than 60 degree

Many electronic devices develop temperature related failure, bullet. Sounds like you have one of those.

You can confirm the trouble with a hair dryer. If it won't start, then you warm up the ignition system and it starts, guess what?