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Thread: xr6 Lower unit change
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08-14-2019, 10:15 PM #1Member
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xr6 Lower unit change
I have a '92 150 xr6 S/N-0D137211. According my research the lower unit is a 4 1/4 inch diameter gearcase with a 1.87 gear ratio. Will a 4 3/4" gearcase fit this motor and will there be any performance difference?
Thanks
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08-15-2019, 02:55 AM #2
Small cases have a 1.78 ratio. You may need to reprop or buy the filler ring for your prophub to close off the exhaust
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08-15-2019, 04:33 AM #3
https://bobsmachine.com/product/blow-out-ring/
maybe/maybe not?.. try it without first.. its gonna ventilate but sometimes that's a good thing.. depends on purpose and your overall rig...
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08-15-2019, 07:37 AM #4Screaming And Flying!
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Depending on your application, the larger case with a 1.87 may be better
Erik Kiser
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08-15-2019, 08:54 AM #5Member
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Thanks for the info guys. Re-propping is a definite as it was over propped when I bought it. Any recommendations on where to get a good reman lower unit at a fair price? Also looking at props but there is a ton of different ones out there. Prop will be going on a Ranger451V. Length 17.5 ft. 84'beam Speed is not the #1 priority but looking for a good balance between hole shot and top end. Any recommendations on props to consider would be appreciated.
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08-15-2019, 02:42 PM #6
Prolly trophy or similar for a good starting point
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08-15-2019, 03:18 PM #7Member
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Thanks Merc
You are the second one to recommend a Trophy, so I am going to try to find one to test.
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08-16-2019, 07:31 AM #8
if ya go to a bigger case try a tempest also if ya run across one..... kinda scarce but work good on some rangers..
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