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connection on thermostat housing

Posted: Thu Jun 04, 2020 8:30 am
by johngosnell
anybody tell me what the electrical connection on the top of the thermostat housing is for

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regards John

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Re: connection on thermostat housing

Posted: Thu Jun 04, 2020 4:17 pm
by John Quilter
That is the Otter switch, a thermostatic switch that controls the starting carb solenoid by grounding it at this switch. Many have bypassed this switch with a switch on the dash that controls the starting carb AKA the "hisser" or AED, (automatic enrichment device).

Re: connection on thermostat housing

Posted: Thu Jun 04, 2020 10:50 pm
by Glyn Ruck
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Invar spring.

Re: connection on thermostat housing

Posted: Fri Jun 05, 2020 9:03 am
by johngosnell
Thanks for the reply, my son asked me what is for and as I never been able to see it I was not sure because the water temp works so I now know


Many thanks John

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Re: connection on thermostat housing

Posted: Fri Jun 05, 2020 5:41 pm
by John Quilter
Your AED must be set up for manual control since there is no wire connection to the Otter switch showing. Yours shows a being mounted with three studs rather than small bolts. Is this common or a conversion? I like this set up as it would make it easier to remove the nuts rather than the small bolts that go into the aluminum thermostat housing.

Re: connection on thermostat housing

Posted: Tue Jun 09, 2020 8:21 am
by johngosnell
yes my car has been converted, long before I bought the car . Again with regard to studs rather than bolt bolts I don't know. If they were always bolted I guess that it has been changed possibly when the manual choke was fitted.


Regards John

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