Does anyone know what the best propeller size is for a coronet 21 DC with Volvo Penta aq170/270? And what topspeed should be expected?

Best Regards

Hello! i would think 15x15" or maybe 15x17", topspeed will be about 27-30 knots
god luck Per

I forget one thing,if you have the orginal (1,89-1 )unit
Per Åkerström

Thank you Per! The unit is 1,89-1