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03-18-2019, 08:30 PM #15000 RPM
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Few four stroke questions on cats
Been doing research and haven’t found an answer figured you guys could help me out. For all these newer outboard cats with either 400r or even on these 32 Doug Wright’s that have 350sci (a few converted raceboats have 350sci) do they use 20 inch shafts or different size? Also I know the verado 350sci has a 5.44 gearcase standard so for a cat is the sport master what is desired? If so does that also have the 5.44 gearcase? Just trying to educate myself thanks for any help.
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03-18-2019, 09:24 PM #2Supporting Member
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Yes they are 20 inch midsections. Yes you want a sport master case. Yes they are the 5.44 dia. gear case.
Joe
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03-18-2019, 09:30 PM #36000 RPM
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As far as I know, all currently in production sportmaster are 5.44”. The larger case has more drag in the water so they must be run high for max speed. Merc moves the water inlet very low on the case to allow higher running heights.
The only 350-400 hp outboard that was available in 15” was the [$$$] 400ros.
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03-18-2019, 09:41 PM #45000 RPM
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Thanks for the information guys. This site is a wealth of knowledge.
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