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Old 07 March 2014, 06:16   #1
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Country: UK - Scotland
Town: Edinburgh
Make: XS Ribs
Length: 5m +
Engine: Mercury 90 Optimax
Join Date: Dec 2009
Posts: 194
Which prop?

Currently have a Searider 4.7 with 60hp Mercury 4stroke. It has a 12' prop on it but it is really slow to get on to the plane. Which pitch do you recommend?
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Old 07 March 2014, 09:07   #2
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Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
Guess prop recommendations are not good, you must install an induction tach on engine, with you alone with a light boat on a glass flat calm sea, with well trimmed engine apply full wot. Check achieved max rpm and compare them against wot factory stated min and max wot rpm for than engine. Then you can play with prop pitches all day long to optimize engine best performance. The wot test is to know how much under or over proppeedd you are with current prop.

Happy Boating
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Old 08 March 2014, 17:30   #3
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Country: UK - Scotland
Town: Edinburgh
Make: XS Ribs
Length: 5m +
Engine: Mercury 90 Optimax
Join Date: Dec 2009
Posts: 194
Perfect thanks!
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