280 gear ratio

[parm]

i am trying to use aprop. calculator to calculate the right prop for my boat and i need to know the gear ratio for my volvo 280 drive can anyone help me here

boat is a sealine 22 with a volvo aqd40a 130hp diesel, 280 outdrive and a 16 x 13 righthand prop at moment max rpm at moment 3800 max speed 18knts


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[Happy1]

I tried some of the calculators when I was upgrading to a SS prop, however I found that Steel developments in Merton, SE London, took all the worry away with their expertise and sold me the perfect prop, I know have an extra 7mph and a much smoother ride /forums/images/icons/wink.gif

<hr width=100% size=1><font color=purple> "You only see what you recognise, and you only recognise what you know" <font color=purple>

 

[scottie]

ratio is marked on top of the drive as part of pznr***************

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[parm]

thanks i will have a look

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