on the drive shaft seals.
if you look carefully at the driveshaft bearing housing you will see its counterbored to allow the black rubber/metal oil slinger thingy to seat.
the top of that counter bore is where the seal depth is.
that slinger serves two functions
one is it helps hold the seal in place cause as you have noted the press fit in the bore is light.
two is it helps keep the suction of the water pump intake from sucking the oil past the seals.
Yamaha is about the only one that places both springs up.
dunno what to say about bottoming out the prop seals, cant really see where it would hurt anything.
if not seated deep enough the line cutter on the fwd end of the prop thrust washer tears it up.
if you look carefully at the driveshaft bearing housing you will see its counterbored to allow the black rubber/metal oil slinger thingy to seat.
the top of that counter bore is where the seal depth is.
that slinger serves two functions
one is it helps hold the seal in place cause as you have noted the press fit in the bore is light.
two is it helps keep the suction of the water pump intake from sucking the oil past the seals.
Yamaha is about the only one that places both springs up.
dunno what to say about bottoming out the prop seals, cant really see where it would hurt anything.
if not seated deep enough the line cutter on the fwd end of the prop thrust washer tears it up.
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