ORIGINAL: Dauntae
Depending on tank location or many other variables not all engines have the problem BUT if it does then this theary IS valid, If this does happen this will fix it but it does not mean all inverted engines have this problem nor did I say they do, I have many inverted engines without problems but have had it happen with a plane with a higher tank location. WOW some people just want to shoot down everything that is not happening to them.
Dauntae
ORIGINAL: Artisan
ORIGINAL: Dauntae
If the engine is mounted inverted it sounds like fuel is pooling into the head, I just read a trick to fix it if thats your issue, Forgot who came up with it but put a few washers between the engine mount and engine on one side only to angle it a few degrees so the fuel won't be dead center of the head cooling the plug at lower idle. when the plug cools it will give bad transition until it heats back up at higher RPM'S
Dauntae
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Why doesn't fuel pool in the engines that run well inverted?
Lose this theory. It is not valid.
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Sorry if I sounded rude. That was not my intent.
Four-strokes have the valves to let out lots of excess fuel. Two-strokes, as you know, aren't so fortunate.
I have seen various engines that were impervious to being ran inverted. Likewise, or conversely, I've seen engines that flat did not like being ran inverted. Fortunately, the bad runners were engines from long ago and all two-strokes.
I haven't seen any glow engine, lately, that is particularly sensitive to running inverted. I have seen YS engines that seem to be completely oblivious to whichever position they are ran in.
Personally, I do not run engines inverted as a rule. I'm getting old and lazier with every passing day, so anything that makes modeling more complicated than it absolutely needs to be is forsaken and relegated to the back burner.
Besides, I often pay more for an engine because it is pretty (like Hobbsy). The last thing that I want to do is to hide it away in a cowl. <G>
Ed Cregger