I think it's time for a new prop, what are the pros/cons of going to a 4 blade as opposed to the 3 blade im using now of the yami 250

Check this site

http://www.solas.com/newweb/propeller/tech/basic.asp


http://yamahaoutboards.com/propellers/propeller-engineering

Are you running stainless now?
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thx flyrod. not stainless mike

Go stainless.
also ronnie went thru all that trial and error 3 to 4 blades on his parker
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Previous owner of my boat switched to a three blade stainless he gained speed and fuel economy
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If you have a heavy load on the boat the 4 blade is the way to go.

If you have a heavy load

I heard back in the day that Paul had many heavy loads....

:doh: i'll find a prop shop and see what they have to say

You asking on the wrong website.
go to
www.classicparker.com
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joined up there a few weeks ago

Get a mercury revolution 4 prop.
just not sure you want a 17 or 19.
All depends on rpms.
19 you may not reach max rpms.
Your center console is a bit lighter than a sport cabin so a 19 could be fine.
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Try prop gods. Ken knows props. I went to a four blade SS from a 3 blade SS.

I can plane at a lower speed, less bowlift, and only lost MAYBE 1MPH at WOT.

Greater low end torque. Not much to gain in speed though. We use 4 blades on the Towboats for that reason.
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