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Mercury 4hp with stripped crankshaft splines
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<blockquote data-quote="Sinkingfast" data-source="post: 367743" data-attributes="member: 15306"><p>Interesting situation you are in as I'm rebuilding a 4.5 single at this moment. The model series I have has the drive splines open to the crankcase to keep the splines lubed with premix. And is a great place to let in unwanted air. My pwc is a greased spline with a seal at the impeller. Wonder about that 2cyl Gnat? I'm also curious how much shaft whip might be controlled by the amount of interface between the male and female spline. I would maybe look for a tighter interface spline assy and find a way to keep things lubed. </p><p></p><p>Someone here had been given a motor, I think single cyl 4hp, that acted to them as a stripped spline. It turned out to be the prop hub slipping.</p></blockquote><p></p>
[QUOTE="Sinkingfast, post: 367743, member: 15306"] Interesting situation you are in as I'm rebuilding a 4.5 single at this moment. The model series I have has the drive splines open to the crankcase to keep the splines lubed with premix. And is a great place to let in unwanted air. My pwc is a greased spline with a seal at the impeller. Wonder about that 2cyl Gnat? I'm also curious how much shaft whip might be controlled by the amount of interface between the male and female spline. I would maybe look for a tighter interface spline assy and find a way to keep things lubed. Someone here had been given a motor, I think single cyl 4hp, that acted to them as a stripped spline. It turned out to be the prop hub slipping. [/QUOTE]
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Mercury 4hp with stripped crankshaft splines
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