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Old 07-19-2016, 04:44 AM   #1
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Default 96 2300 SC alpha one 5.7 liter 300 HP

I recently purchased a 96 2300 SC alpha one 5.7 liter 300 HP. Before taking it out I purchased the prop I was told was original (was kept as backup to prop that came on boat that I had to remove); Mercury Mercruiser Black Max Propeller 48-16440- A40 16P. I water tested it this weekend, while light chop and windy it maxed out about 23 knots. What prop do you recommend for better performance?

Secondly, I noticed it does not have a blower, but fume hose leading to side vent in engine compartment. Thoughts?
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Old 07-19-2016, 11:16 AM   #2
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A 5.7 300 HP, is this a repower MPI engine? In 96' the original engine was most likely a 5.7 260HP 4 bbl carb.

Try Mercuisers prop calculator

https://www.mercurymarine.com/en/us/...tor/#/step-one

What you want in a prop is to achieve the engines rated WOT which for your engine should be 4400 - 4800 rpm

Add a blower no question.
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