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Hard starting.

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joeing701(at)internet.is
Guest

Posted: Fri Jun 26, 2009 4:48 pm Post subject: Hard starting.

Hello list members,  Doug and D. Wysong.



I found out the problem with the hard starting. Grounding was good,  

battery good but the starter solenoid  was bad.

One friend mentioned that this could be caused by a low voltage  

starting from when the regulator/rectifier died. When I tried to start  

the engine a few times with a low voltage,

the solenoid may have partly connected and created a blockage between  

the internal connection.????



At least I found the cause and had to let you all know.

Thank you for your advise Doug and D. Wysong.



Best regards,

Johann G.

Zenith 701

Iceland.

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John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Sun Jun 28, 2009 5:01 pm Post subject: Re: Hard starting.

Hi Johann:



Good to see you have your 701 flying.



What engine do you have on your airplane?



I had a hard starting problem with my first 912 back in 1994.  Eventually discovered closing the spark plug gap from .028 down to .020-.025" eliminated the problem.  Haven't had it with my two 912ULS engines.



Haven't read the thread or anything else on the Rotax List, so I am probably repeating something someone else has shared with you.  Starter needs to turn the engine 200 rpm to get the Ducati ignition system to fire.  A low battery, poor connections, solenoid, etc., all contribute to this problem.



Give me a shout back copy some times.



john hauck

mkIII

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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

rampil

Joined: 04 May 2007
Posts: 870

Posted: Mon Jun 29, 2009 5:28 am Post subject: Re: Hard starting.

Johann,



Low voltage is unlikely to harm the starter solenoid, it will

either close the connector or not, and is not likely to chatter.

Corrosion is much more likely.



The starter normally runs exclusively off battery. The voltage regulator

controls the alternator and doesn't effect the battery voltage.



Ira

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_________________
Ira N224XS

joeing701(at)internet.is
Guest

Posted: Mon Jun 29, 2009 6:06 am Post subject: Hard starting.

Hello Ira.



Thank you very much for the advice. Could there be a corrosion inside  

the solenoid?

The original Ducati regulator/rectifier was tested with engine running  

on the C connection, and there  was no charging detected.

Because the charging was not keeping the battery fully charged, it  

drained during my flight that day.

I wanted to fly one more circuit before calling it a day, and then  

discovered that the battery was drained.

Replaced the regulator/rectifier, charged the battery and then  

nothing, just a very slight turn of the prop, like the battery was dead.

Jumped it with my car, and no change. When we gave the solenoid a  

direct hit from a fully charged battery, at the same time I turned the  

switch starter, it turned normally.

After that, everything has  been working, but I decided to replace the  

solenoid if it could be in and out. Do not want to be stranded  

somewhere with a bad solenoid.



I have checked all connections from the battery to the starter and  

everything is clean.



Best regards,

Johann G.



On 29.6.2009, at 13:28, rampil wrote:



 	  Quote: 	
		   

 >



 Johann,



 Low voltage is unlikely to harm the starter solenoid, it will

 either close the connector or not, and is not likely to chatter.

 Corrosion is much more likely.



 The starter normally runs exclusively off battery. The voltage  

 regulator

 controls the alternator and doesn't effect the battery voltage.



 Ira



 --------

 Ira N224XS





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