[Boss Man]

Hi Guys,
I posted on the Yahoo site, but thought I'd post this here also.

Since the weather is turning cold here again in the Northeast, a
thermostat question has come to mind. Joe had asked me if a
thermostat the hadn't been drilled, could be run with the new style
water pump. I told him I didn't know, but I believe the info on the
pump stated they could be run "dead head" as in the use of a hose end
nozzle when used with a garden hose. (On a boat I presume)
So I'm wondering if anyone that has the new pump, has used a non-
drilled thermostat.
I know some of the guys here are at Biketoberfest now, so I might
have to wait a bit for an answer. But I'd appreciate any thoughts on
this. Thanks..........Don

 

[hossbuilder]

Thermostat

I posted this on the Yahoo site. But here it is as well. This info comes directly from the Product Manager at Jabsco.

==============================================

I sent an email to to Keith Evans, the Product Manager for the water pumps used on the Boss Hoss. He is the person I worked with to get the new higher capacity pump. Here is his answer to the "thermostat question".

-------------------------------------------------------------------------------------

Neil

It is never a bother, we are here to help.

A centrifugal pump, such as the Cyclone(stainless head) or
Centri-puppy(older brass head) can both be run against a closed head.
The impeller used here does not produce any significant discharge head
pressure, so no damage is expected. You will actually see a lower
current usage when closed on the discharge. You only have to be
concerned is the pressure to the pump exceeds the seals capacity to
remain sealed to the shaft. In the typical applications, or such as Boss
Hoss Hoss, you are fine.
If this pump were a rubber impeller or in some designs, such as a vane
pump, back pressure would damage the pump, but not centrifugal.

Hope this helps.

Keith M. Evans
Market Specialist - Marine

-------------------------------------------------------------------------------------

Therefore, you can run a thermostat with no modification in the Hoss.

Neil

Phone: 352-429-4907
email: [email protected]

 

[Bryan Ward]

Boss Man,

I tried a non-drilled 180 thermostat in my 04 SB. It was a very cool day last spring and I don't think I even rode 4 miles before the temp was at 200. The fan came on and I knew I would have trouble keeping it cool like that, so I put the drilled 180 back in. It works fine like that, winter and summer. Hope this helps a bit.

Bryan

 

[Boss Man]

Brian,
Thanks for the info. I'll try a thermostat over the Winter. But with your info, I'll probably put in a 160 degree. Right now, the fan comes on at 180-185, and shuts off at 170. That's in the warmer months. Days when it's only in the 50's, it doesn't get hotter than 150 on the gauge, unless I'm stuck in traffic. So maybe a 160 will do the trick. We'll see. But thanks again for the info. :capwin: .......Don

 

[Zenbiker]

I'm also going to try the 160 thermostat without the drilling of holes. If I run into the same problem I'll drill the holes but I have to trust the company. We'll see...Joe

 

[Zenbiker]

Anyone know the correct part number for a 160 degree thermostat for the small block? The catalogs are confusing and give auto applications that I can't translate into our use...Thanks, Joe