1987 19ft 4.3 merc prop size

[Clarko1988]

I just need to know what the best prop size would be for this size of boat. Thanks in advance.

 

[Scott06]

I just need to know what the best prop size would be for this size of boat. Thanks in advance.

do-you have a prop on it currently? And if so what prop is it and what is WOT rpm?
best is a relative term depending on how you use the boat.
generally for basic all around performance you will have a 19” thre blade aluminum black max type When sitting on a dealers lot, maybe a 17” if its heavier and has a 2 bbl vs the 4 bbl carb.

there are a lot of variables though like outdrive gear ration, weight and beam of boat , how loaded down the boat is.

 

[Clarko1988]

So i had to put a spare prop on it and its 13x13 and barley moves the boat. And feels like it slips at higher rpms not sure of the wot.

 

[jbcurt00]

See prop discussion

Alpha 1 gen 1 4.3 merc prop size

Just use the boat for fishing dont want anything crazy. My main prop spun and there was a spare prop in the boat its 13x13 barley feels like it moves the boat. Feels like if i go to high rpm it does move at all.. Can you guys recommend a prop please thank you.

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