Triple-tapered prop shaft normal?

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Joined
Oct 24, 2018
Messages
715
Location
USA
Vessel Name
Mischief Managed II
Vessel Make
1992 Tollycraft 44 CPMY
A friend of mine replaced a Tides seal on one of is prop shafts. His shaft is tapered at the coupler, the prop end, AND he claims there's a taper just aft of the seal. Is that normal? Seems odd to me. Boat is a 2003 Carver 410 Sport Sedan.
 
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