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Old June 14th 21, 08:02 PM posted to rec.aviation.soaring
Dan Marotta
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Posts: 4,601
Default Russia AC-5M Engine Problem

Increasing throttle after turning off the ignition might just make it
diesel longer.* Perhaps reducing the idle RPM with the idle adjustment
screw would help but you may then need to apply a little throttle to
keep it running.* I recall a 1973 Chevelle that I owned that had an
anti-dieseling solenoid which kept the throttle opened enough to idle
with the ignition on and, when the ignition was turned off, the solenoid
allowed the throttle to close completely choking off the air.


On 6/13/21 5:38 PM, Branko Stojkovic wrote:
On Sunday, June 13, 2021 at 3:36:32 PM UTC-7, Dan Marotta wrote:
Do you have a fuel cut off valve? How about a choke lever, pulling the
choke on a hot engine might kill it.

On 6/13/21 9:34 AM, Branko Stojkovic wrote:
I have been having a problem with shutting down the MZ35 engine in flight on my Russia AC-5M. The engine keeps running (dieseling) for a couple of minutes until it cools down enough and finally quits. I changed the spark plug, took off the cylinder head and cleaned the carbon deposits, but to no avail. Does anyone have any ideas on what I could try next? Thanks in advance!

BTW, there used to be good AC4 a Yahoo group before Yahoo shut all their groups down. Has anyone archived it?


Thanks for the suggestions Dan. The fuel cut-off valve is installed in the engine bay and there is no choke. I haven't tried giving it full throttle, do you think that might work.