CP, what you say explains observations I witnessed in a previous endeavor; I had difficulty telling what was going on during climbs/dives. Replies in another thread suggest turning tank around in pusher config but was wondering if engine can draw fuel through long hose w/o crankcase or some kind of pressure and would this change get rid of sagging during climbs? CC, I can't remember seeing dark, residual oil around drive plate/crankcase union on pusher config in distant past*, but what Pond Skipper said above has me a little concerned, so I'm undecided at this point on shim/washer. Will probably hand prop rear. My start procedure plan is to start rear first, tune and shut down, start fwd, tune, then start rear again and launch. Hopefully fwd engine cools rear some prior to launch. Thanks for all the advice though; I'm still learning stuff and that's cool.
*Doesn't mean it didn't happen - just don't remember...
Last edited by H5606; 06-08-2015 at 08:10 AM.