Prop size on O'Day 28

[RickN19488]

Am repowering my (new for me) O'Day 28, replacing the original Universal MD 5411 with a Yanmar 14 hp 2YM15. My boat is missing the original prop which I'm told was a 2 bladed one. Short of hauling and measuring clearance, can anyone tell me what size prop was original equipment, or what diameter can the shaft clearance accept?Thanks,RickN

 

[dave]

O'Day 28 prop size

Went thru this exercise about 8 months ago. Tried for months to determine the correct size and submitted a lot of info and measurements to Michigan Wheel Corp, who ran the numbers I gave them and told me I needed a 12R13 (wrong!). I finally was able to contact Rudy at D & R narine(after about 2 dozen calls to him) and he knew right away that the stock size for the 1981 O'Day 28 was 12R8. I purchased a 12R8 bronze 2-blade sailer prop with a 3/4" bore, which they bored to a 1" standard taper shaft size, and shipped to me for $369 including freight, from H & H Propeller (www.hhprop.com, 800-325-0117). It has very little prop walk and seems to function quite well, I'm very happy with it.

 

[Frederick Pierce]

prop size 28 oday

HI, Rick, In my 28 oday 85 the orignal owner repowered from the universal 11 HP. to a yanmar 3gm30f which is a 27 HP and during a sea test I found I was overloading the engine it was over prop. I took it to H&H Propeller inc which they put all the information about he boat and the transmission ratio in the conputer and opened up the pitch angle all for $104. and what a difference it made excellent.as DAVE said he went to H&H Propeller they are great co, they are in MA. & ME good luck Frederick Pierce