merryfisher 925 calorifier

[sundancer9000]

Engine survived the big freeze over winter! However i forgot the calorifier!!! so it is damaged the internal element/tubes are fractured. Any ideas for next year? should i take all hoses off the 'boiler' and drain it completely?

 

[Ripster]

I run a small 60w tube heater next to mine (the cal) that comes on at the same time as the main engine room tube heater and the cabin oil rad. First time I have tried this as I too was worried about the cal and all the pipes around it. It worked a treat and does not cost much more to run. This as well as releasing the pressure by running the taps and leaving them open with the pump off.

 

[David of Essex]

I have a 925 and for the last 3 winters have drained the cal and making sure the pressure relieve valve is open, touch wood is ok this time.
David

 

[Scubadoo]

I keep two tube heaters on a theromostat in the engine bay, and as Ripster has said, leave the taps open to reduce the risk.

It has worked for me for many years and I don't bother draining the system down as I use the boat during the winter.

 

[PaulGooch]

I have a Merry Fisher 805, for the worst of Winter weather i drain the potable water and the calorifier. Taps are all then left open and the pumps off. No problems in the three Winters we've owned the boat.