answers...
it was running great - it was starting easily by hand... WOT @ 4,000 RPM with 2 out on the high needle and 6 out on the low needle (set with the throttle closed) very rich - a lot of black oil coming out of the motor
cylinder temps - 185 degrees cylinder two, 195 degrees cylinder 1, and 205 degrees cylinder 3 - all F with a digital laser temp gauge on the top of the cylinder
exhaust - no "pooling" that I could see/hear... started by hand
crankcase vent - no tube or blockage
Originally Posted by
hpergm
Sorry to hear about this outcome...
- When you say it ran great, you mean it was running near optimum mixture or still overly rich (but not stopping)? If it was run lean, then the cylinder might have simply seazed. With any luck, you won't have crankshaft damage and will simply need to replace cylinder/piston/ring.
- Then, the cylinder temps; 195 is F or C? I take it this was during running @ WOT. How did you measure - by IR?
- Also, any chance one of the lower exhaust tubes creating some sort of siphon to allow gravity poolling of fuel/oil? Did you crank the engine by starter or hand?
- Was the air vent of the crankcase free-breathing?