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1. 06:20 PM - Timing (BobbyPaulk@comcast.net)
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I am need of help.
I had the flywheel and the back end of the engine removed to make repairs. The
drives for both mags were removed and re-installed. ( I didn't need to do this
but it was too late when I realized it. )
I purchased a degree wheel and found TDC of No. 1 by going about 30 degrees before
and 30 degrees past ( measuring the piston down travel the same ) and splitting
the difference to find the center of the dead spot. I lined up both rotor
buttons with the timing marks on the side of the distributor support at 25 deg.
BTC and made sure they were parallel. We did this about 12 to 15 times until
we were satisfied it was correct. When the engine is at TDC on #1 the rotors
are pointing to #1 on the distributor cap.
I used a Honda Coil on the right side and the Rotec E-Mag on the left.
The engine started but ran very, very rough and sounded like it was out of time.
It also would not run with the choke off nor would it take the throttle. We
used fresh 100 LL and took the bowl off the carb and made sure we had plenty of
fuel flow with the elec. boost pump.
The engine would start easily but ran very rough and would not take the throttle
even after warm up. Outside temp was 72 F. deg.
Going to either one mag made no difference in how the engine ran although you could
hear a little drop in RPM.
Can anyone offer a solution. I sure do not want to remove the engine and flywheel
and start over. Could I be a tooth off on the distributors??
The carb was removed from the rubber connector and left on the aircraft while the
engine was removed and on a stand and not touched during this time ( all linkage
remained in tact.
Bobby
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 236 hrs.
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