I am looking to purchace a new motor for my O'Day 25. I have a bracket that allows the motor to set into the water nicely. The motor that is on there now has a standard length shaft and I think that it does well. I am looking to replace it with another standard length shaft model. I just wonder if there is a real need for a long shaft sice I have this plate that allows me to lower the motor to a level that I feel is acceptable. What I am really looking for is an explanation of what application is a long shaft or extra long shaft motor truly needed. Does my 25 draft enough to warrant a long shaft?
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Paul
long shaft
I also have a 25 O"Day and have a mariner 15 hp long shaft. Under calm conditions you can get away with the normal length shaft. If you get into rough conditions the motor will have a tendency to come out of the water even with the drop down plate.
I also have a 25 O"Day and have a mariner 15 hp long shaft. Under calm conditions you can get away with the normal length shaft. If you get into rough conditions the motor will have a tendency to come out of the water even with the drop down plate.
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justin - o'day owners' web
I'd go long shaft
I would go longshaft. The issue is not so much the length at rest but what happens when the boat pitches in chop or a swell. Since the engine is so far aft of the center of pitch, it tends to lift. I'd go long shaft or even extra-longshaft. Justin - O'day Owners' Web
I would go longshaft. The issue is not so much the length at rest but what happens when the boat pitches in chop or a swell. Since the engine is so far aft of the center of pitch, it tends to lift. I'd go long shaft or even extra-longshaft. Justin - O'day Owners' Web
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Mike
Long shaft worth it
If you can, get an extra long shaft (25") model. The deeper the propeller, the better off you will be in any sort of chop.
If you can, get an extra long shaft (25") model. The deeper the propeller, the better off you will be in any sort of chop.
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Craig Edwards
Extra Long Shaft
I have an '84 O'Day 25 with a Mercury 9.9 with the extra long shaft. In heavy chop the boat just keeps chugging along. If you think the boat moves fine with a standard length motor you'll love how she handels with the extra long shaft!
I have an '84 O'Day 25 with a Mercury 9.9 with the extra long shaft. In heavy chop the boat just keeps chugging along. If you think the boat moves fine with a standard length motor you'll love how she handels with the extra long shaft!
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Rod Johnson,
Extra-long is worth it.
I know someone that had a 1975 O'Day 25 and used to complain that even with a longshaft he would at times have the prop lift out of the water in a sea. I'd go with the extra-longshaft (25") due to this, but also because having that extra 5" of depth may let you raise the mounting board up one notch instead of being dropped fully down, this will reduce the chance of dunking the powerhead of the motor in a sea.
I know someone that had a 1975 O'Day 25 and used to complain that even with a longshaft he would at times have the prop lift out of the water in a sea. I'd go with the extra-longshaft (25") due to this, but also because having that extra 5" of depth may let you raise the mounting board up one notch instead of being dropped fully down, this will reduce the chance of dunking the powerhead of the motor in a sea.
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Rod Johnson,
Extra-long is worth it.
I know someone that had a 1975 O'Day 25 and used to complain that even with a longshaft he would at times have the prop lift out of the water in a sea. I'd go with the extra-longshaft (25") due to this, but also because having that extra 5" of depth may let you raise the mounting board up one notch instead of being dropped fully down, this will reduce the chance of dunking the powerhead of the motor in a sea.
I know someone that had a 1975 O'Day 25 and used to complain that even with a longshaft he would at times have the prop lift out of the water in a sea. I'd go with the extra-longshaft (25") due to this, but also because having that extra 5" of depth may let you raise the mounting board up one notch instead of being dropped fully down, this will reduce the chance of dunking the powerhead of the motor in a sea.
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Nathan
Extra Long Shaft
I think it depends on your sailing grounds. I've got a 26 with a long shaft that pops out in heavy chop (6+ foot rollers), but for normal 2-4 footers, it is fine. I will tell you, though that I've been stuck in heavy weather, when it seemed that the prop was out more than half of the time and believe me, when your running for shelter, the LAST thing you want to hear is the racing scream of your prop popping out of the water. You want all the help you can get when your surfing down the backside of an eight footer in the driving rain.
I think it depends on your sailing grounds. I've got a 26 with a long shaft that pops out in heavy chop (6+ foot rollers), but for normal 2-4 footers, it is fine. I will tell you, though that I've been stuck in heavy weather, when it seemed that the prop was out more than half of the time and believe me, when your running for shelter, the LAST thing you want to hear is the racing scream of your prop popping out of the water. You want all the help you can get when your surfing down the backside of an eight footer in the driving rain.
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Lionel
8 hp Yamaha
I just replaced my OMV Saildrive and the mechanic at the boatyard recommended the 8hp yamaha longshaft high thrust model. I'm very pleased as it has electric start, remote control and best of all power tilt. I was leary about loosing the inboard and the cockpit controls but this has it all. Good luck!
I just replaced my OMV Saildrive and the mechanic at the boatyard recommended the 8hp yamaha longshaft high thrust model. I'm very pleased as it has electric start, remote control and best of all power tilt. I was leary about loosing the inboard and the cockpit controls but this has it all. Good luck!
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Mike Whalen
How much is it worth
I see that you are on Kentucky lake. I sail on the Tennessee River. I have a 9.9 standard length. I've been out in about the worst weather I expect to ever see on the lake and the prop was seldom out of the water. I guess if there is a chance you will take this boat to open seas then maybe but if you or I ever see 8 foot rollers on our lakes, the prop is the least of our worries. I'd expect that the end times were here and let go of the tiller so as not to be destracted from the wild s*** that must be coming. So the question is how much would you pay for the unlikely prospect of big waves on an inland lake? Good Luck, Mike
I see that you are on Kentucky lake. I sail on the Tennessee River. I have a 9.9 standard length. I've been out in about the worst weather I expect to ever see on the lake and the prop was seldom out of the water. I guess if there is a chance you will take this boat to open seas then maybe but if you or I ever see 8 foot rollers on our lakes, the prop is the least of our worries. I'd expect that the end times were here and let go of the tiller so as not to be destracted from the wild s*** that must be coming. So the question is how much would you pay for the unlikely prospect of big waves on an inland lake? Good Luck, Mike
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