| Bill,
What plugs are you running? My 20b runs much better on the Renesis irridium plugs. It used to "hiccup" with the factory NGK plugs, now it only does it when it is time to change plugs.
Mark S. On Wed, Jan 9, 2013 at 8:22 AM, Jeff Whaley <jwhaley@datacast.com> wrote:
Bill, something you can check that doesn’t take too long:
Pop the top off your EC2 and slowly press on the socketed, micro-controller chips one at a time – they should not move; if one does it is not 100% seated in the socket.
Jeff
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No, I have the 2.85 gearbox. I have the MT electric prop, so I fly WOT and use the prop to govern the engine speed.
I have changed the plugs with no effect. The mixture is fine when this is happening. Fuel pressure also. I had an incident once on take off like you
describe where the plane was backfiring like crazy just after I lifted off. I had the mixture too rich. I dialed it back and everything smoothed out. This is different. It doesn’t really backfire. It is a thump and it jerks the engine and plane. You
can hear and feel it. It seems to be a single thump and it has varying degrees of violence. Some are just a little miss and some are so bad it shakes everything. These are less frequent, but they are bad enough that I don’t think they are good for the PSRU,
prop, or engine mount.
That is why I have been bugging Tracy about the change for the EC-2. I have my fingers crossed that this will fix it. :>)
Bill B
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