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                           RotaxEngines-List Digest Archive
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                     Total Messages Posted Sun 03/05/06: 2
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Today's Message Index:
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     1. 03:05 AM - Re: 912uls battery for cold starting   ()
     2. 10:30 PM - Skilled 914 mechanic close to New York?  ()
 
 
 
________________________________  Message 1  _____________________________________


Time: 03:05:59 AM PST US
Subject: RE: RotaxEngines-List: 912uls battery for cold starting 
From: <max.johansson@nokia.com>

--> RotaxEngines-List message posted by: <max.johansson@nokia.com>

RE: 912-ULS starting battery - lessons from cold Finland: 


SAL, my friends in their 912ULS equipped 701 have had 
a lot of battery related starting problems this winter 
and this is what they recommend:


(1) Never mind to get the biggest Ampere-hour (Ah) 
capacity, go for the minimum internal resistance 
(milliohms) instead. 

(2) Make the battery cables short and exchange the 
starting current cables to low resistance types,
typically thick, and expensive and with soldered ends.

(3) The engine grounding strap is equally important.

(4) Buy a spare relay and try with that if you suspect
that you might for some reasons have increased relay 
contact resistance. Good to have as a spare anyhow.

(5) Use the correct starting procedure, that is no 
throttle at all when the choke is engaged and use
throttle only after the engine has started. 


The battery they finally selected was a low-resistance 
VARTA of less than the required 17Ah capacity but with 
the lowest internal resistance thus giving the highest 
starting current. Today they are surprised if the engine 
does not start at the first try even if not pre-heated. 
The battery weight savings was unfortunately eaten up 
by the heavier cables. On the positive side the battery
allows faster charging with a mains connected charger.

Hopefully these hints are helpful

regards
Max 
CH701-912ULS builder in Helsinki 


> -----Original Message-----
> From: owner-rotaxengines-list-server@matronics.com
> [mailto:owner-rotaxengines-list-server@matronics.com]On Behalf Of ext
> SJA
> Sent: Sunday, March 05, 2006 2:58 AM
> To: rotaxengines-list@matronics.com
> Subject: RotaxEngines-List: 912uls battery?
>  
> --> RotaxEngines-List message posted by: "SJA" <salbore@netzero.net>
> 
> I have a 912uls.  Have a pre-heat and float charger.  And am 
> still having trouble with cold starting this engine.
> 
> What battery are you using with this engine?  Any suggestions?
> Thanks.
> SJA


________________________________  Message 2  _____________________________________


Time: 10:30:07 PM PST US
Subject: RotaxEngines-List: Skilled 914 mechanic close to New York?
From: <rparigor@suffolk.lib.ny.us>

--> RotaxEngines-List message posted by: <rparigor@suffolk.lib.ny.us>

Anyone know of a skilled Rotax 914 mechanic close to Long Island, New
York?

Thx.
Ron Parigoris