Mercury outboard assistance

I’m in the process of restoring a ‘66 Whaler 13’ and bought a '93 Mercury 25 hp motor to put on it. I was told that this motor has a thermostat on it that prevents the water from pumping through until the motor warms up. Does anyone know if this is accurate? Also would like to know of someone who works on Merc’s of this vintage?

Hobie Outback
WS Ride 135
15’ Henry O w/Johnson 50

They do have a thermostat but, water still comes out the pee hole it just doesn’t get hot until after thermostat opens up. Most 80’s and up I know have one.

J Ford

You can’t catch 'um on the couch!

I’ve got an '87 Mercury 45hp Classic 50, and as far as I can tell, it does not have a thermostat. A Merc. mechanic I know tried to find one on his parts schematic at work (with me there next to him)and could not find one. Not even a listing or part number for one.

Bob Van Gundy
Marine Designs,Inc.
Custom Aluminum Fabrication
803-727-4069

Thanks for the replies, helps alot.

Hobie Outback
WS Ride 135
15’ Henry O w/Johnson 50

it does have a tstat
we work on them

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