Oday 30 Raw water flow and folding props - SailNet Community

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  #1  
Old 08-11-2007
deniseO30's Avatar
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Oday 30 Raw water flow and folding props

I love my Oday!

A few things...

Now that I've had my O30 a year, and I didn't ck before the splash this spring. Would anyone know what size and rotation folding prop/s fit the Oday 30? I has a Universal 5416 diesel.

Also. It's never even come close to over heating and (the 5416 has a oberdorfer pump) But, the water flow out the exhaust is not typical of other boats I see. Most shoot a large stream of water about every 10-20 seconds. Mine only makes a continous sputter and small shots of water when on higher rpms. All the lines are clear and strainer is also. Heat exchanger I thnk is new. The flow of water to the dripless shaft seal is quite high and we cut that back by using a smaller water tube. Still I'm not happy with the output flow. The exhaust hose rises almost 3ft above the muffler in a arching curve and the muffler is about 16" below the exhaust manifold.

One other thing bothers me. When ever the boat is motoring the exhaust outlet is in the backwash of the boat.. Should it be above the motoring water line? It doesnt' seem to hurt anything but it really makes a mess of the transom and even gets one's backside wet if they are sitting behind the wheel on top the transom.

Denise

thanks in advance!
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Old 08-12-2007
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Hi Denise,

Post this question on the O'Day e-mail list. You will get a better response. At the top of this page click on resources then e-mail list and sign up under the O'Day e-mail. O'day owners there are very helpfull.

Dennis
O'Day 302
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O'Day 302

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Old 08-13-2007
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O'Day conserns

denise; first the exhaust being under water when motoring is normal. when under power the stern squats about 7 or 8". the high loop is there so that under certain circumstances such as running under sail with big following seas that the water can't get past the anti siphon loop to back up into the engine.
i can't help you a lot on the prop size for your boat as mine has a yanmar. prop rotation should be clockwise as viewed from the stern. as to size that depends on the gear reduction of trans. my guess for size would be a 15" dia w/ a 10" pitch or maybe a 15/9. i have a 15/12 on mine, but i know its over propped and i have to get it cut down. over propping isn't a good thing as it overloads the engine. 15" dia is the biggest dia folding prop that can be put on it because , when folded it would interfere with the rudder.
get used to the dirty transom, its just the nature of this beast. I have to clean mine down several times every season.
if the engine isn't overheating i wouldn't worry about it.
S/V Que Pasa?
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