Re: Stuck prop
Hi kend20gw, interesting problem, I assume the anti-seeze spark plug thread stuff would reduce this problem. To answer your question about heat expansion. Aluminum has a heat conductivity 4 times that of iron or steel, the thermal expansion of aluminum is twice that of steel, so, if you could heat both materials with the same amount of heat the aluminum would absorb the heat 4 times faster and expand 2 times as fast as the steel. Enough of the physics, basically the aluminum prop would expand and loosen on the steel shaft and with some gentle hammering or pulling come off. Perhaps you should evenly heat the aluminum prop only, no need to expand the steel shaft, this should loosen the prop faster and reduce the possibility of ruining the rubber parts, maybe, maybe not. Since you have to remove the prop you have little to lose, Good luck.