Today's Message Index:
----------------------
1. 11:19 AM - Electrical Issue (Mike Chaney)
2. 02:07 PM - Re: Electrical Issue (Guy Buchanan)
3. 03:51 PM - Re: Electrical Issue (Michael Gibbs)
Message 1
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| Subject: | Electrical Issue |
I would like to throw an issue to the group to see If there are any suggestions.
This involves a Kitfox IV with Jabiru 2200 .
Before departure last week I pushed the "push to talk" button to announce my intentions
and noticed my electrical oil pressure gauge needle went down. The engine
continued to run fine. When I released the PTT button the gauge indicated
normal again. If fact any time I turned on a electrical device; strobes or
transponder, the oil pressure needle went down.
I have checked for loose wires, chafed wires, loose connections and found nothing.
I replace the oil pressure gauge and the problem persisted.
I am in no way an electrical expert and not sure if I even understand the problem
let alone solve the problem. I didn't just change the oil pressure gauge as
a shot in the dark hoping for a fix, there were a few other things which didn't
seem right with the gauge. However, I really don't want to begin buying and
replacing parts just to see if it fixes the problem. This can get expensive.
Any comment are welcome.
Mike
1996 Kitfox IV, Jabiru 2200
Sent from my iPad
Message 2
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| Subject: | Re: Electrical Issue |
Ima gonna say bad ground, somewhere. The oil pressure is voltage based
so any time an additional electrical load causes a voltage variation to
the sender it will change the signal. If your's is a single wire sender
then the sender's trying to ground through it's attachment, which can
frequently be a problem. I changed my single wire sender to a double
wire with dedicated ground for that reason. Otherwise there might be a
problem with your engine ground strap.
Guy Buchanan
Ramona, CA
Kitfox IV-1200 / 912-S / Warp 3cs / 600 hrs
Glider pilot, too
On 7/6/2017 11:19 AM, Mike Chaney wrote:
>
> I would like to throw an issue to the group to see If there are any suggestions.
> This involves a Kitfox IV with Jabiru 2200 .
> Before departure last week I pushed the "push to talk" button to announce my
intentions and noticed my electrical oil pressure gauge needle went down. The
engine continued to run fine. When I released the PTT button the gauge indicated
normal again. If fact any time I turned on a electrical device; strobes
or transponder, the oil pressure needle went down.
>
> I have checked for loose wires, chafed wires, loose connections and found nothing.
I replace the oil pressure gauge and the problem persisted.
>
> I am in no way an electrical expert and not sure if I even understand the problem
let alone solve the problem. I didn't just change the oil pressure gauge
as a shot in the dark hoping for a fix, there were a few other things which didn't
seem right with the gauge. However, I really don't want to begin buying
and replacing parts just to see if it fixes the problem. This can get expensive.
> Any comment are welcome.
> Mike
> 1996 Kitfox IV, Jabiru 2200
>
> Sent from my iPad
>
>
Message 3
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| Subject: | Re: Electrical Issue |
I agree with Guy. I think a lot of times builders decide that using the fuselage
weldment as a ground is the easy solution but, in my experience, it seldom provides
reliable performance. My starter solenoid was originally wired that way
and it seemed like everything was good but, after a while, I realized it was
only working intermittently. Running a wire from the solenoid to a good ground
fixed the problem.
Mike G.
Phoenix, AZ
Kitfox IV-1200 Speedster/Series 7
> On Jul 6, 2017, at 2:06 PM, Guy Buchanan <gebuchanan@cox.net> wrote:
>
>
> Ima gonna say bad ground, somewhere. The oil pressure is voltage based so any
time an additional electrical load causes a voltage variation to the sender it
will change the signal. If your's is a single wire sender then the sender's
trying to ground through it's attachment, which can frequently be a problem. I
changed my single wire sender to a double wire with dedicated ground for that
reason. Otherwise there might be a problem with your engine ground strap.
>
> Guy Buchanan
> Ramona, CA
> Kitfox IV-1200 / 912-S / Warp 3cs / 600 hrs
> Glider pilot, too
>
>
>
>> On 7/6/2017 11:19 AM, Mike Chaney wrote:
>>
>> I would like to throw an issue to the group to see If there are any suggestions.
>> This involves a Kitfox IV with Jabiru 2200 .
>> Before departure last week I pushed the "push to talk" button to announce my
intentions and noticed my electrical oil pressure gauge needle went down. The
engine continued to run fine. When I released the PTT button the gauge indicated
normal again. If fact any time I turned on a electrical device; strobes
or transponder, the oil pressure needle went down.
>>
>> I have checked for loose wires, chafed wires, loose connections and found nothing.
I replace the oil pressure gauge and the problem persisted.
>>
>> I am in no way an electrical expert and not sure if I even understand the problem
let alone solve the problem. I didn't just change the oil pressure gauge
as a shot in the dark hoping for a fix, there were a few other things which
didn't seem right with the gauge. However, I really don't want to begin buying
and replacing parts just to see if it fixes the problem. This can get expensive.
>> Any comment are welcome.
>> Mike
>> 1996 Kitfox IV, Jabiru 2200
>>
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