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Old 08 April 2019, 06:25   #11
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Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Mercury
Length: 3m +
Engine: Suzuki Outboard/25/4
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Posts: 5,167
if you read this link it answers most questions, as dave says you might struggle to find a four blade although these might have them but you'll lose top end speed with one more for weight towing toys etc
for the OP the increase in pitch could be the straw that breaks the donkeys back but only he will know what performance he's getting OMO if it works with an 11 pitch i would stick with it or maybe go stainless steel youll get about a 5% extra performance out of one, but then some dont like stainless because it can cause more damage than aluminium if you hit something

https://www.propeller-shop.eu/propeller-info/
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Old 08 April 2019, 08:37   #12
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Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Mercury
Length: 3m +
Engine: Suzuki Outboard/25/4
MMSI: 235074042
Join Date: Oct 2011
Posts: 5,167
honda do a 20hp with a four blade prop
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