X-Mozilla-Keys:                                                                                 
Finn Lassen wrote:

Thanks for all the responses.

Things are looking up. I thought I'd list some of the problems I've run
into so far, their causes and solutions:

Carbs flooding no matter how I adjusted float level.
Cause: Collapsed walls on (brass) floats.
Solution: Open up the small soldered-to hole, solder on a small brass
tube, and squirt enough air from compressor via vinyl tube to pop out
the wall, remove spacer and solder small hole shut.

Couldn't figure out how to properly jet all three carbs.
Covered up two outer carbs at intake manifold.

Could not get the engine started on center carb no matter what choke and
throttle setting.
Found and cleaned blocked (choke/start) passage in carb.

Engine starting to run lean and miss above 3000 RPM
Float set too low.
Adjusted float higher.

Now I'm getting 4200 RPM with full open throttle, on just the center
carb. I've jetted it too rich. O2 sensor reads about 820mV, and optimum
is 600mV.
Need to solder main jet shut and drill up  with #50 or #49 drill.

The problem I haven't solved yet is the air box. I had thought that ram
air would be a good idea, but when putting on the air box the engine
runs terribly lean. That, by the way, caused me a lot of confusion when
jetting the carb.

That prop sure generates a lot of wind even at a "low" 4200 PRM (1935
prop RPM). How do you guys check timing at 5000 RPM? Tie yourself to a
pole with a rope? Or maybe remove the prop?

Finn

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