Perkins 4.236 Thermostat question

Happy New Year everyone!! I posted a while back on a head gasket job and happy to say I completed that project which also turned into rebuilding to injectors, professionally servicing the heat exchanger and oil cooler, a new water pump, and all new hoses. I had to replace the thermostat about a year ago and I used a 180 degree thermostat. The sender is towards the aft of the engine so what I end up getting is reading that is a hotter temp, up to 200, before the thermostat opens up and then it holds an even 180. It was doing this before I changed the thermostat because I thought the original one was sticking. The alarm is closer to the thermostat. I’m wondering if I should switch out the locations for the alarm and sender for a more accurate reading. I’m also thinking of going with a 170 thermostat. I just serviced the whole cooling system (except for replacing the thermostat) so I know I have good cooling and lots of water running through the engine. Any input is appreciated! Thanks, Keenan Smith S/V Madison de Sante

Keenan, If it is viable, with wire extensions, it might be good to place all the senders and thermostat in a pan of water on the galley stove along with a decent kitchen thermometer and check accuracy. Also, I seem to remember a Cal 46 /Maison de Sante/ at Kona Marina, San Diego before we sailed /Marlyn/ up to Frisco. Same boat? Still there? Duane Duane Knize S/V Marlyn 1978 Cal 2-39 #18 berthed: Emeryville, CA kn… [at] san.rr.com On 1/2/2018 11:29 AM, Keenan Smith ke… [at] gmail.com [Cal_Boats] wrote: > > Happy New Year everyone!! I posted a while back on a head gasket job > and happy to say I completed that project which also turned into > rebuilding to injectors, professionally servicing the heat exchanger > and oil cooler, a new water pump, and all new hoses. > > I had to replace the thermostat about a year ago and I used a 180 > degree thermostat. The sender is towards the aft of the engine so what > I end up getting is reading that is a hotter temp, up to 200, before > the thermostat opens up and then it holds an even 180. It was doing > this before I changed the thermostat because I thought the original > one was sticking. The alarm is closer to the thermostat. I’m wondering > if I should switch out the locations for the alarm and sender for a > more accurate reading. I’m also thinking of going with a 170 > thermostat. I just serviced the whole cooling system (except for > replacing the thermostat) so I know I have good cooling and lots of > water running through the engine. > > Any input is appreciated! > > Thanks, > Keenan Smith > S/V Madison de Sante > >

Hi Duane, Thanks for your insight. I just noticed today that my cockpit gauge and interior gauge are two different temp ranges so I bought two new gauges today and a dual sender online. This is the Maison de Sante you’re thinking of but I have been the owner only since last December. The previous owner had her 30yrs so it didn’t feel right changing the name. Plus, I need all the good luck I can get. She was in pretty good shape when I bought her but I have since done a total re-rig and engine overhaul plus a bunch of normal things like a new water heater, fridge, and batteries. I think I’m just about done going through ever inch of the boat. Today was a new sump pump and check valves for the forward head. I should post photos :) > On Jan 2, 2018, at 1:58 PM, Duane Knize Boat <kn… [at] san.rr.com> wrote: > > Keenan, > > If it is viable, with wire extensions, it might be good to place all the senders and thermostat in a pan of water on the galley stove along with a decent kitchen thermometer and check accuracy. > > Also, I seem to remember a Cal 46 Maison de Sante at Kona Marina, San Diego before we sailed Marlyn up to Frisco. > > Same boat? Still there? > > Duane > Duane Knize > S/V Marlyn > 1978 Cal 2-39 #18 > berthed: Emeryville, CA > kn… [at] san.rr.com >> On 1/2/2018 11:29 AM, Keenan Smith ke… [at] gmail.com [Cal_Boats] wrote: >> Happy New Year everyone!! I posted a while back on a head gasket job and happy to say I completed that project which also turned into rebuilding to injectors, professionally servicing the heat exchanger and oil cooler, a new water pump, and all new hoses. >> >> I had to replace the thermostat about a year ago and I used a 180 degree thermostat. The sender is towards the aft of the engine so what I end up getting is reading that is a hotter temp, up to 200, before the thermostat opens up and then it holds an even 180. It was doing this before I changed the thermostat because I thought the original one was sticking. The alarm is closer to the thermostat. I’m wondering if I should switch out the locations for the alarm and sender for a more accurate reading. I’m also thinking of going with a 170 thermostat. I just serviced the whole cooling system (except for replacing the thermostat) so I know I have good cooling and lots of water running through the engine. >> >> Any input is appreciated! >> >> Thanks, >> Keenan Smith >> S/V Madison de Sante >> >> >