ignition failure

by Hans Labruyere in 912 / 914 Technical Questions 5 years ago

Hi all,

Today I finally started my overhauled 912ULS. It runs smoothly, I balanced the carbs mechanically and pneumatically. The latter stuck with trying, because I couldn't get enough RPM (some 3000). Switching off showed no RPM drop on L, and a shut-off when the key turned to R.

So, one ignition box seems to be missing here? I swapped all 4 plugs and tried again: still shut-off when turned to R.

I swapped the key-block for another one, to see if that could help: still shut-off when turned to R.

Now, these items are very expensive, so I'd like to do some investigation before I order a new one: anyone ideas what to do next?

Re: ignition failure

by Garrett Wysocki » 5 years ago

Garrett Wysocki

1 572 1.45k

Check for a pushed pin in the connectors, sometimes when reconnecting individual pins can get pushed out just enough to not make electrical contact. It also may be a ground problem check that all grounds are common. If the engine was just reinstalled a ground connection may have been missed. It seems unlikely an ignition module failed while waiting for the engine to be overhauled probably a wiring issue.

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ignition failure

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