Aside from the fact he likely needs a 140 and not the 160 on Amz.-

When you say Amazon version are you referring to the Stewart Warner High Flow I linked, this is actually a Robert Shaw T-stat marketed by SW? Just trying to determine if there is a functional difference or known quality issue with the Stewart Warner (Robert Shaw) T-stat. It is Brass construction. Do we know anything about who manufactures or where the CP T-stat comes from? As I am fresh water I see it as a one in maybe 10 year purchase. I ran my 120 High Flow (unknown brand, bought in 2001) for 10 or 12 years and it still worked same as new. I am just looking to source a 160 high flow for a different boat and or perhaps a 140 depending upon some further testing. Just easier to for me to buy from Amz, Prime, free shipping etc. I am going out on a limb I suspect any Brass one we come across is likely made in the same place.

DonJuan,

I'm not the expert, and I have no empirical evidence, but here are my thoughts....

I guess it depends on whether you have closed cooling or not. From all the reading I can find and contemplating on it, this seems to make all the difference. If you have fresh water cooling, I can definitely see the need for a T-stat. You really don't want pockets of 85° water coursing through your block and heads. But with closed cooling, the coolant is going to warm up regardless, and it will not have the occasional pocket of much cooler water. It may take a bit longer to get to temp, but not significantly. The end result will be more cooling capacity via higher flow than a T-stat will allow.

We're gonna find out.

Thanks. Brad.

@Brad. Yes, stock heat exchanger. 87Mirage thought my temps were good with the 120 tstat. But if a plate cools it down another 5-10 degrees, maybe I should try the plate. More flow seems better. As far as warm up, I have ten minutes in the 5 zone to fast water.

The Amazon did not have the spring loaded bottom plate like the 496 does. I have no idea if necessary or not. I also run the SW High Flow T-stats with no issues.

Rookie,

The one I linked is a Quicksilver, from the Quicksilver store. What's the difference between this one and what you're talking about?

Thanks. Brad.

Never assume (guess) . Sincevyour going in for a cooling issue, Tell’m you want these replaced anyways. :thumbs

SB,

Agreed, and that would be the plan. It's been the better part of two seasons, anyway, so no money lost/wasted. I am just trusting them to not let me forget.

Thanks. Brad.

My screen name is SB.
Most of us , but not all, choose not to use an actual name.
Thanks.

SB,

Heard and corrected.

Apologies.

Thanks. Brad.

Post #7 is the 496 thermostat.