80 HP 912UL will not start

by David Wallis in 912 / 914 Technical Questions 10 years ago

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Re: 80 HP 912UL will not start

by Roger Lee » 10 years ago

Roger Lee

125 5.12k 4.53k

Hi David,

I have been noticing a terrible trend of 2006-2007 modules failing. I have talked to at least 20 people over the last few months with failing modules and read on forums of more. Due to the high demand for modules right now there is a longer than normal delay in getting them.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Re: 80 HP 912UL will not start

by itemprop='name' » 10 years ago

0 0 0

Hi roger

There is a lot in those years have failed in Australia too , we have pulled a few apart and a friend has drawn up the full circuit with all component values he has found a few things they should have put in the circuit to help stop them from failing . The caps inside need to have a higher heat rating then 80c deg temp there are 100 c rated caps out there for cents more . A few of the chips need a little circuit protecting so stop them burning out if ever started with one spark plug lead not on or grounded properly . You are only looking at 5 dollars more in total cost bring hole unit manufacture cost to under 70 dollars . Cheers Daniel .

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Re: 80 HP 912UL will not start

by David Wallis » 10 years ago

David Wallis

2 13 0

What a shame all this had to happen for a few pennies so to speak after the large amount they charged initially for these Modules. Are they made by Ducati I wonder? They should offer a trade in program for bad units.

I was going to stop flying until the new modules arrived but decided to try ice instead of hot air today. I have a small fridge in my hanger and chemical ice packs in the freezer. I put one on the module and did my usual preflight. I was pleasantly surprised when the engine started immediately on the first try after all the checks were done.

I still don't venture very far from the airfield. The air was very pleasant with low temperatures (75 °F is equal to 23.89 °C. ) and not too bad humidity and a very slight crosswind. Just enough to make it interesting doing T& G in the pattern.

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Re: 80 HP 912UL will not start

by Roger Lee » 10 years ago

Roger Lee

125 5.12k 4.53k

Hi David,

The failing modules seem to only have a starting circuit issue and if they start should do fine once running. Just keep in mind that repeated attempts to start either one time or multiple days may ruin your starter or shorten its life. Just be careful.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Thank you said by: Maarten Lobker

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Re: 80 HP 912UL will not start

by Hans Ryrstedt » 10 years ago

Hans Ryrstedt

0 3 0

, we have pulled a few apart and a friend has drawn up the full circuit with all component values .

Hi I am planning to take one apart, maybe you can post the circuit diagram instead?

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80 HP 912UL will not start

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