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Old June 17th, 2008, 02:29 PM
baleon baleon is offline
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Default 1970 Mercury 800 choke not functioning

I have a 1970 80hp Mercury that runs very well but recently the electric choke stopped functioning when my 3 year old put it in the on position and then left it. This makes the engine a bit of a bear to get started unless I use starting fluid which requires taking the cover off, the manual choke was disconnected by the previous owner but would still require cover removal. Once we get going all is good. Any ideas?
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Old June 17th, 2008, 03:44 PM
Chris1956 Chris1956 is offline
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Default Re: 1970 Mercury 800 choke not functioning

Ok, Why not replace the solenoid or choke button or fix the linkage of the electric choke?
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Old June 17th, 2008, 04:03 PM
baleon baleon is offline
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Default Re: 1970 Mercury 800 choke not functioning

Well I was not sure if there might be a way to test or reset the solenoid. They are fairly hard to find. The linkage and the plunger still function properly.
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Old June 17th, 2008, 07:40 PM
Moody Blue Moody Blue is offline
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Default Re: 1970 Mercury 800 choke not functioning

Would recommend not using starting fluid. No lubrication there. Possible engine damage may occur.

The choke button should be a momentary type switch. Once released the choke should shut off automatically.

Are you sure the solenoid is the problem? They can not be reset/repaired but you can test them. Using an ohm meter check between the wire terminal and the body of the solenoid. Should measure about 1 ohm if good. An open circuit is bad news.

To check the wiring, connect a voltmeter (or test lamp) between the solenoid terminal and a ground. Have someone push the choke button. You should get 12V (or lamp lights). If neither of the above, then wiring or the choke button is the problem.

Good luck.
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Old June 18th, 2008, 12:26 PM
baleon baleon is offline
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Default Re: 1970 Mercury 800 choke not functioning

Okay, I will check it with a test light and quit using starting fluid. Thanks for the help.
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Old June 18th, 2008, 12:40 PM
baleon baleon is offline
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Default Re: 1970 Mercury 800 choke not functioning

Okay, that was simple enough. It appears the choke is bad. It is getting power from the switch just not operating. Thanks again.
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