ORIGINAL: chuck l
bubbagates,
Not sure what the apology was for, if I sounded harsh, I hadn't meant to. BTW, all my gas engines have the line running into the fuselage. I don't think it is a clunk problem because of what I experience with the sudden, harsh, up or down movement. The engine hasn't had a chance to run low on fuel because it happens both upright and inverted. I'm going to switch back to Zenoah's straight velocity stack that came with the engine, replacing the beveled one, and see what happens. If that doesn't solve it, I'll replace the clunk as you described.
Chuck
Chuck,
Nope, I did not take it as harsh, I apologized for making suggestions that you had already done. I thought maybe you might have been slightly offended by me suggesting the obvious, it's just the desire of me to help people out and sometimes certain people take offense to that even though I meant well. I can see that is not the case here so as far as I am concerned, it's a done deal
Have you tried just removing the stack or did that make it worse? The g-26 I have in my Super Stearman hates having the stack installed no matter which type.