Experienced our first overheating this weekend > Running for 10 min before I noticed appx. 200˚ before I shut her down. Thankfully the winds were great we sailed the entire journey giving the engine enough time to cool only to set the anchor.
Our 1975 C&C33 came with a new A4 from MMI (still in the break-in period!). Besides change the oil, plugs and fuel filters, I haven't touched the engine nor the FWC system in the 3 seasons we've owned her. I thought with a new engine there's not much I need to do, right? Wrong.
The forums have been so helpful:
1) Must be the thermostat – so today I checked and NO thermostat installed! (there is a 160˚ one that came with the boat). Note-1: There is thermostat housing spacer installed. Note-2: Cooling system bypass kit has also installed and set to full open.
2) I check the sacrificial zinc anode at the HX and it was GONE. Just the plug. The hole was completely blocked with crud so I cleared it out with an awl and got it draining nicely again. Zinc replaced.
I have my thermostat housing off and now wondering what to do next?
> Install this existing Tstat that I have here?
> Order one of the MMI 150˚ thermostats?
> Keep it as is with NO thermostat?
> Was the plugged HX from the zinc causing it to not be able to cool the coolant?
> Do I need to install new gaskets the Tstat housing?
Thanks all!
Our 1975 C&C33 came with a new A4 from MMI (still in the break-in period!). Besides change the oil, plugs and fuel filters, I haven't touched the engine nor the FWC system in the 3 seasons we've owned her. I thought with a new engine there's not much I need to do, right? Wrong.
The forums have been so helpful:
1) Must be the thermostat – so today I checked and NO thermostat installed! (there is a 160˚ one that came with the boat). Note-1: There is thermostat housing spacer installed. Note-2: Cooling system bypass kit has also installed and set to full open.
2) I check the sacrificial zinc anode at the HX and it was GONE. Just the plug. The hole was completely blocked with crud so I cleared it out with an awl and got it draining nicely again. Zinc replaced.
I have my thermostat housing off and now wondering what to do next?
> Install this existing Tstat that I have here?
> Order one of the MMI 150˚ thermostats?
> Keep it as is with NO thermostat?
> Was the plugged HX from the zinc causing it to not be able to cool the coolant?
> Do I need to install new gaskets the Tstat housing?
Thanks all!
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