I noticed before i ever started the engine on this boat that the coupler had a fair amount of runout in it.Â* I check the crankshaft and it is fine, but the flywheel or coupler is where the problem is located.Â* I've been reading through the big thread, and i noticed that a few others have had this problem as well.Â* Since it is still under warranty, i assume hobby services will send me a new one, but will a new one be any better than the one i already have? I'd rather not have to pay for an ''upgraded'' part since the stock one should have been made properly to begin with.Â* Thoughts?
IÂ*ruined one flex shaft trying to pull it out of the coupler because there is some kind of burr or something inside my drive coupler that makes it really hard to get the shaft in or out.Â* When i was trying to remove it, even with the collet threaded all the way loose, pulling on the prop to get the whole assembly out fo the tube unwound the flex shaft and pulled it most of the way out of the stub.Â* I tried to spread the teeth of the coupler apart, but i still bascially have to thread the flex shaft into and out of the collet, it will NOT slide in, even with pretty sever pressure.
Also, the last few times i've run, i've noticed that there seems to be some play between the strut/stuffing tube and the stub, such that the propeller seems to vibrate in the stuffing tube when turning at idle.Â* I.e., the center of the prop basically oscillates around a circle with diameter equal to the play between the tube and the stub.Â* I'm sure it doesn't get better at high rpm. I don't remember this much play being there before, butÂ*even if it was it can'tÂ*be the ideal.Â* Everything i'm running is stock, prop, shaft, strut etc.Â* Is it possible that the stub has been worn down against the brass stuffing tube?Â* Somehow i think the law of material science prevent this,Â*Rockwell hardness and all.Â* If anything was going to wear out first it would seem to be the brass stuffing tube, not the stainless stub.Â* But, obviously, i'm a noob and don't know what i don't know.Â* More importantly, now that i know that there is play in the strut/stub location, how do i fix it?Â* I guess i need to know what's out fo spec first. Are there published specs with tolerances on teh diamter of the stub, and the inside dimater of the stuffing tube at the strut?