T90 overheating problem solved

[chas]

I post this in case it is of some use to anyone else out there. My T90 has had an overheating problem since the end of last season which has proved a bu$$ar to trace. I went through the whole of the salt water system, replaced the impeller, cleaned the heat exchanger tubes etc. etc. but made no difference. I then changed the thermostat, changed the fresh water hoses, checked the water pump. Still overheated. I have been through both systems several times, checked the thermostat at least three times and replaced it again with another thermostat that I had checked. Then came the GBO. I remember from my youth when you could work on car engines, thermostats had a little hole in the disk, just in from the rim. Both my replacements had not, so I drilled one and put it back in. Problem solved and no overheating! Obviously an airlock was forming under the thermostat and it was not operating correctly.

Hope this helps someone.

 

[castaway]

Good tip..well done.

I must say that when I get an over heating problem I usually take out the thermostat all together as part of the 'remove anything that could possibly restrict the flow approach'

All best Nick

 

[graham]

Nice one.Its little tips like that that you cant get from reading a manual.