How To Test T-Stat?

[pscrabber59]

I have a 2005 Yamaha 25hp four-stroke. When last run 2 wks. ago while flushing motor water was luke-warm to warm with a sometimes spuddering pee-stream, not the steady stream I'm used too with this motor.

So I took the T-Stat out and I really don't know how to ck & see if the T-stat is working or not. Do I need any special tools? I'v read where your suppose to drop the t-stat in some hot water and see if it moves or opens up. Is this the usual way to ck?? I will also change out the impeller after the t-stat fix.

Any advice is always appreciated

 

[rowlex]

Re: How To Test T-Stat?

drop in hot water

 

[arks]

Re: How To Test T-Stat?

No special tools.
I take a small pot, fill it with water, suspend the stat in the water with a short wire.
Heat it up and measure the water temp with a thermometer, It should open within 10% of the value stamped on the case.
Piece of cake!

 

[pscrabber59]

Re: How To Test T-Stat?

thanks guys! sounds easy enough.

 

[athens1]

Re: How To Test T-Stat?

Hot water test is the best way to test it. New thermostats are dirt cheap and if there is any doubt, replace the thing.

athens1