Zenith-List: 912 hard start when hot

[caspainhower@xxxxxxx]

--> Zenith-List message posted by: caspainhower@xxxxxxx


I'm not that familiar with the 912, but something to keep in mind is that a
manifold or carb base can warp when hot and cause an air leak when the
engine reaches temperature.  That will lean the mixture further heating the
engine.  An air leak closely emulates fuel starvation, although typically
air leakage will cause rough idling, it will definitely cause hard starts.
Especially if one or two cylinders are affected more than the others.  Just
an idea to consider. Vacuum leaks can be one of the hardest problems to
diagnose.

Craig S.
N601XS


>
>  If you land and shut down, will not
start at all using any combination of inputs. choke/no choke (enricher).
Throttle /no throttle. cussing/praying. boost pump/no boost. After 30
minute
cool down starts fine.
>     If you land and let idle for 10 or so minutes, (I know this is not
good for engine, but has been part of trying to find problem) when you take
off, r.p.m. will drop off around 3500 or 4000 and engine won't make full
power. sometimes will die completely.
>     I'm out of ideas and will try anything. Thanks.


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