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dougsnash
Joined: 14 Apr 2008
Posts: 281
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 Posted: Fri Jun 26, 2009 2:45 am Post subject: RotaxEngines-List Digest: 1 Msgs - 06/25/09 |
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Johann, think of the elctrical system like a plumbing system. You have a water source (battery +) and a drain (ground and batt -). For an electrical component to work, both must function correctly. The most common electrical problem in airplanes is a bad ground so make sure your engine ground wire is at least the same size as the wire going to your starter. Verify that it has a good connection at both ends. That should take care an the drain side.
Next, check the start solenoid. It is possible for the contacts to become bad. This is kind of like a water valve that won't open all the way.
Hope my ideas (and gooofey analogies) help.
Doug MacDonald
CH-701 Scratch Builder
NW Ontario, Canada
| Quote: |
Subject: Rotax 912 ul hard starting
Hello fellow listers.
I am having a problem with starting my Rotax 912 UL engine.
A full
battery is not turning the starter, but if I remove the
starter and
charge it directly from a battery, it turns.
I removed the spark plugs and started again, and the engine
is turning
very slowly and then slowing down. I thought the
problem was with the
regulator and after testing it, it showed no charging.
But that should not affect the starting ???? I replace the
Ducati
rectifier/regulator with a Schicke GR 6 regulator.
The engine has a high compression and everything is turning
normally
when turned by hand.
Do you have any suggestions to this problem?
Thank you in advance.
Johann G.
Zenith 701
Iceland.
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__________________________________________________________________
Get the name you've always wanted (at)ymail.com or (at)rocketmail.com! Go to http://ca.promos.yahoo.com/jacko/
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joeing701(at)internet.is
Guest
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| Posted: Fri Jun 26, 2009 5:27 am Post subject: RotaxEngines-List Digest: 1 Msgs - 06/25/09 |
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Hello Doug.
Thank you very much for your input. I will definitely recheck all the
ground system. The cables are the same size, so it could be the
connections or the solenoid. I will let you know tonight of the outcome.
Best wishes,
Johann G.
Iceland.
On 26.6.2009, at 10:43, MacDonald Doug wrote:
| Quote: |
>
Johann, think of the elctrical system like a plumbing system. You
have a water source (battery +) and a drain (ground and batt -).
For an electrical component to work, both must function correctly.
The most common electrical problem in airplanes is a bad ground so
make sure your engine ground wire is at least the same size as the
wire going to your starter. Verify that it has a good connection at
both ends. That should take care an the drain side.
Next, check the start solenoid. It is possible for the contacts to
become bad. This is kind of like a water valve that won't open all
the way.
Hope my ideas (and gooofey analogies) help.
Doug MacDonald
CH-701 Scratch Builder
NW Ontario, Canada
>
> Subject: Rotax 912 ul hard starting
> Hello fellow listers.
>
> I am having a problem with starting my Rotax 912 UL engine.
> A full
> battery is not turning the starter, but if I remove the
> starter and
> charge it directly from a battery, it turns.
> I removed the spark plugs and started again, and the engine
> is turning
> very slowly and then slowing down. I thought the
> problem was with the
> regulator and after testing it, it showed no charging.
> But that should not affect the starting ???? I replace the
> Ducati
> rectifier/regulator with a Schicke GR 6 regulator.
> The engine has a high compression and everything is turning
> normally
> when turned by hand.
> Do you have any suggestions to this problem?
>
> Thank you in advance.
>
> Johann G.
> Zenith 701
> Iceland.
__________________________________________________________________
Get the name you've always wanted (at)ymail.com or (at)rocketmail.com! Go
to http://ca.promos.yahoo.com/jacko/
|
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hdwysong
Joined: 06 Jun 2008
Posts: 21
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| Posted: Fri Jun 26, 2009 10:19 am Post subject: RotaxEngines-List Digest: 1 Msgs - 06/25/09 |
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| Quote: | I am having a problem with starting my Rotax 912 UL engine.
....
Do you have any suggestions to this problem?
|
Sounds like you need a new battery, Johann. While the voltage says your battery is the battery is "full", a load test will likely show that it isn't able to source the current required.
D
[quote][b]
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