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#1
04-14-2008, 04:51 PM
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V-4 gears in a V- 6 Lower Unit
A wile back I posted about different gear ratios in V-6 OMC lower units. I replaced a lower unit with what I thought was the correct replacement. Over time i suspected it had a lower gearing than the original but come to find out It's a lower unit for certian V-4's, I think!! The gearing is 2.25 to 1 which is specs for some "big lower unit" V-4 models. The lower units appear to be the same except for the gear ratios. First, does anyone suspect I'll have any strength issues with the V-4 gears? My motor is a 150. Second , knowing my ratio for sure lets me calculate a prop slip of .06 at W.O.T. Is that where I should be? By the way, I found out my ratio by turning the prop once and noting the timing wheel movement of 2.25 times so I'm sure of the ratio. Any comments are appreciated.
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" I'm the one thats got to die when its time for me to die; so let me live my life, the way I want to". J. M. Hendrix 
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#2
04-14-2008, 09:05 PM
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Re: V-4 gears in a V- 6 Lower Unit
Many of the v4's came with v6 style or heavy duty gearcases, I have switched many from a v4 to v6 etc with no issues. you should be fine, strengthwise as there is not a Giant power gap between a 135 or 140hp v4 and a 150 v6.
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Seacraft's for life !!!
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#3
04-14-2008, 09:05 PM
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Re: V-4 gears in a V- 6 Lower Unit
Many of the v4's came with v6 style or heavy duty gearcases, I have switched many from a v4 to v6 etc with no issues. you should be fine, strengthwise as there is not a Giant power gap between a 135 or 140hp v4 and a 150 v6.
__________________
Seacraft's for life !!!
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