Poor Starting 912iS

So it would appear NOT to be a fuel issue.

The 912is engines start on the Lane "B" ECU initially and then toggle to the "A" side shortly thereafter.

When the engine quits, what do the Lane lights indicate?  Watch closely!

Bill Hertzel wrote:

So it would appear NOT to be a fuel issue.

The 912is engines start on the Lane "B" ECU initially and then toggle to the "A" side shortly thereafter.

When the engine quits, what do the Lane lights indicate?  Watch closely!

Started the engine today and as usual then engine quit after 2 seconds.  2nd attempt started fine.  I watched the Lane lights as you suggested and nothing illuminated when it quit.

Fuel, Air, Squeeze, Spark, Bang!

Are you cracking the throttle as instructed on page 3-7 of the Operators Manual?

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Operators Manual Section 3.4.9; Throttle valve:

Put throttle between 1 to 2 cm throttle opening (correlates with 55%-65% throttle valve opening).

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The ECU simulates a choke by supplying extra fuel at the initial startup and it may just be flooding until it gets a little heat into the head if the throttle is not open.

* * *  Let's see if this sticks to the wall! 

Yes, I crack the throttle as instructed in the OM.

Well Nuts!!! Again!

I am running out of ideas.
I might suggest putting it on a BUDS dongle and see if there are any error messages.
All those uncommanded stops should have logged something.

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During the 3 seconds that it does run, are you able to get it above 2500rpm?
That is where it switches to dual lane operation.

Do you have a feel as to how long you need to wait between starts before the problem reappears?