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Overpowering a 1991 coastal 236 by 30 hp

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Topic author
outkast
Posts: 2
Joined: Wed Jul 31, 2019 2:46 pm
Vessel Info: 1991 wellcraft coastal 236

Overpowering a 1991 coastal 236 by 30 hp

Postby outkast » Sun Aug 11, 2019 4:04 am

Hi all. I'm trying to decide between repowering my coastal 236 with a Yamaha 250 , or 300. The capacity plate says it's rated for 270 max hp. I'm leaning towards the 300 because it's pretty much the same weight as the 250, and it's fuel economy is nearly identical. I figure it would be nice to have plenty of punch in heavy seas. My concern is whether or not I should be worried about over stressing the transom. My current setup is a Yamaha 2.8 200. Boat has a 2' metal offshore bracket. Does an offshore bracket increase the strength of the transom at all?


CptBill
Posts: 76
Joined: Fri Sep 07, 2018 6:37 am
Vessel Info: Jester Toy
2002 270 Coastal, Twin Yamaha 4 stroke 250
Location: Hudson Fl
Has thanked: 2 times
Been thanked: 2 times

Re: Overpowering a 1991 coastal 236 by 30 hp

Postby CptBill » Mon Aug 12, 2019 1:58 pm

Just the opposite, larger HP more Torque, more strain on the transom
The trouble with trouble is it starts as fun!

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