Mercury Classic 50, 45 hp, 87-89 year

carolynandjoe

Recruit
Joined
Jun 23, 2009
Messages
2
serial # 0C145238
I noticed water coming out of COVER ASSEMBLY, Cylinder Block by #1 spark plug. the previous owner had applied silicon where the gasket was leaking.
while removing it i broke a wire coming off some type of sensor located next to plug #1 the cover has an opening made to fit around the sensor and plug #1.
Could some one please tell me what is the name of the sensor and what does it do, i grounded the wire with motor on and it kept on running,, with motor off and ignition key on and i heard something making a very slight noise when i grounded the wire...... also i think the motor is an 89 but would some one know from the serial # what year it is??

thank you
joe
 
Last edited:

corm

Lieutenant Junior Grade
Joined
May 12, 2000
Messages
1,241
Re: Mercury Classic 50, 45 hp, 87-89 year

Hi,
That was your over heat sensor.
 

AMD Rules

Lieutenant Commander
Joined
Sep 23, 2004
Messages
1,707
Re: Mercury Classic 50, 45 hp, 87-89 year

That's a really late 1989 model. Must be one of the last 45hp motors built.

Sensor is your temperature switch. There are two versions, each are about $50 to replace:

96829A 1 260? Tan
16775A 2 300? Tan/Green

When grounded, you should hear an alarm.
 

Attachments

  • temperature_switch.jpg
    temperature_switch.jpg
    25.7 KB · Views: 0

carolynandjoe

Recruit
Joined
Jun 23, 2009
Messages
2
Re: Mercury Classic 50, 45 hp, 87-89 year

I can't thank you guys enough, great info and fast..... You guys are great.

joe and carolyn
 

cat toon

Seaman
Joined
Sep 20, 2010
Messages
61
Re: Mercury Classic 50, 45 hp, 87-89 year

Great Info here thanks for the replies you give the people
 
Top