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klehman(at)albedo.net
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 Posted: Wed Jul 03, 2013 11:34 am Post subject: Master Switch/Contactor and Starter Questions |
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That is what I did. Not zero risk but not something I worry about.
We always check for normal charging voltage after start and before
takeoff which should catch a failed on starter solenoid.
I think it is likely that turning off the battery contactor would stop a
stuck on on starter at least one time but I've never tested that.
I've seen a lot of grief when conversions try to "improve" something
over the tried and true method used in thousands of automobiles. The
subaru starter was not designed to run with an external starter
contactor. If you add the additonal starter contactor, how often would
you test it for having failed closed anyway. I like simple and I like
most modern automotive technology - well up to a couple of years ago
anyway...
Ken
| Quote: | > The Corvair uses a Subaru starter which has an almost zero weld closed
> failure rate so I'm still thinking of running a large wire from the
> battery contactor to the big lug on the starter and using the starter
> solenoid as an independent way to turn the engine over. Two less
> junctions in the high current path.
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dgaldrich
Joined: 24 Apr 2009
Posts: 267
Location: Naples, Fl and Belfast, ME
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| Posted: Wed Jul 03, 2013 4:13 pm Post subject: Re: Master Switch/Contactor and Starter Questions |
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I agree. It seems pointless to have 2 solenoids operating at the same time. The other issue is that I believe the Subaru solenoid moves the gear before the contactor part puts juice to the motor brushes. An aircraft type contactor would do both at the same time rather than sequentially. Have not dismantled one so I may be in error.
Dave
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