I am repowering my 28' ODay with either a new yanmar 15 or 20hp diesel. I have spent a lot of time researching with different shipyards and mechanics and had pretty much decided on the 20 hp with a new 3 blade prop 12 " by 14 pitch. Then a yanmar mechanic said that he wouldn't put a 20 in my boat. He gave me lots of reasons/concerns but has not actually measured the engine compartment.
Here is my question: have any of you repowered a 28' ODay with a YM20. How did it work? Did you have to change the shaft ( I have a 1" shaft that was replaced in 2009)? What prop did you put on? Did you have any cavitation problems? I would appreciate any information you can give me! Thank you!
Here is my question: have any of you repowered a 28' ODay with a YM20. How did it work? Did you have to change the shaft ( I have a 1" shaft that was replaced in 2009)? What prop did you put on? Did you have any cavitation problems? I would appreciate any information you can give me! Thank you!