Hi John
Thanks for the info. As this problem is happening with many 912S engines
---From new I would suggest that the fault is unlikely to be any of items 1,2
or 3 on your list. From what I have been told, kickback accelerates sprag
clutch wear which in turn makes the problem worse so sparg clutch wear is
more a symptom of the problem rather than the cause. As well as the suggestions
you mention I position the prop just after a compression before start so
it gets the best possible run at its first compression. Having tried all
these ideas I still find the single ignition start the best way to avoid
kickback especially on cold starts.
Nigel Charles
>-- Original Message --
>Date: Wed, 23 Jun 2004 16:23:08 -0400 (GMT-04:00)
>From: Europa Aircraft <europa@gate.net>
>To: europa-list@matronics.com
>Subject: Re: Europa-List: Starter kickback
>Reply-To: europa-list@matronics.com
>
>
>Hi All & Nigel,
>
>We investigated the starter kickback issue on the 912ULS a great deal at
>the US office lately. Basically, it is down to a number of issues.
>
>Including the following:
>
>1. Carbs out of balance.
>2. Gearbox too loose, dog gears may need to be shimed. Skydrive, or Lockwood
>can do this.
>3. Insufficent power to the starter. On cold days, unless you have a large
>battery, external power may be nessicary on the 912S.
>4. Sprag clutch loose or warn - replace this last as it is the hardest.
>
>The high torque starter also helps, however, with enough power you should
>still be fine.
>
>Also, carbs out of balance, a loose gearbox, or weak battery can damage
the
>sprag clutch, so you may have more than one issue.
>
>We have also found that is is helpfull to get the prop spinning fast before
>pulling the choke to prevent kickback due to flooding.
>
>Hope that helps!!
>
>John Hurst
>Europa Aircraft
>Lakeland, FL
>
>-----Original Message-----
>From: nigel charles <nigelcharles@tiscali.co.uk>
>To: europa-list@matronics.com
>Subject: Re: Europa-List: Starter kickback
>
>
>>I am told there is an up rated starter motor available that cures the
>problem.
>
>The motor is about an inch longer and turns the engine over faster
>during the start.<
>
>Yes there is and I know that it ceratinly helps to spin the engine quicker.
>However as it is longer I am told it cannot be used with Classic engine
>mounts so this is an option for XS owners only.
>
>Nigel Charles
>
>
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