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Old 10-28-2002, 08:14 PM
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RSB
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Default Outboard in water when below freezing?

I plan to do some weekend fishing on a lake in the Mountains of N.C. (Lake Fontana) this winter. My inlaws have a dock where I can put my boat for the weekend. Often the night time temp goes below freezing. If my boat only stays in the water for a night or two, is there any way to safely leave the boat and motor in the water? Motor is Yamaha F115. Boat ramp is several miles away and prefer not to pull it out every night. Appreciate any thoughts?
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Old 10-28-2002, 08:21 PM
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Default Outboard in water when below freezing?

I wouldn't leave it in the water, RSB.

Water remaining in the cooling system could freeze and break stuff.

Pull it out and leave the engine down so any water in the system will drain.

Good luck.

Red sky at night. . .
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Old 10-28-2002, 08:43 PM
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Default Outboard in water when below freezing?

Tricky question. Normally manufacturers recommend keepin the engine trimmed down when the temps are below freezing. You may be OK to leave it in the water, to be safe, why don't you contact Yamaha to be sure.
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Old 10-28-2002, 08:48 PM
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Default Outboard in water when below freezing?

If it were me, I'd check the water temp. The air can be below freezing, but if the water temp is above 35, I'd think there's no way for anything inside the motor to freeze overnight.

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Old 10-28-2002, 08:56 PM
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Default Outboard in water when below freezing?

I keep my boat in the water all winter and when the temps go near freezing I put the outboard down. I've been doing it as long as I've been living on the water. The only thing is I have a constant flow from a lake upstream into my canal. The constant flow prevents freezing. Many people who don't have a flow use bubbler systems. The end result is that I've never had a problem. Like BadAttitude said if the water is above freezing-no sweat. The last thing you want is to have the prop up to catch water, then freeze and do damage
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Old 10-29-2002, 05:22 AM
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Default Outboard in water when below freezing?

So if you leave the boat in the water for an extended time will algae grow in very cold water? Billy (Buy American!)
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Old 10-29-2002, 06:15 AM
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Default Outboard in water when below freezing?

billy boy,
With the proper application of bottom paint, the only thing I have after two seasons, is a thin cover of slime which I power wash right off.
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Old 10-29-2002, 10:11 AM
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Default Outboard in water when below freezing?

The main thing you do not want to do is to put the boat on the trailer on a cold night and then try to turn over the engine before you put it back into the water. Any water around the impeller will freeze and cause damage to it. You should not have any problems if you leave the motor in the run position so the impeller does not freeze.
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Old 10-29-2002, 11:14 AM
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Default Outboard in water when below freezing?

If you leave it in the water just keep the motor trimmed all the way down and you won't hurt a thing. When you start it up just make sure you have a cooling stream coming out once the motor is warm. If not, shut it down, wait 5 minutes and start her up again. We used to leave the boat in the water late in the year. Occasionally the boat would get frozen in if we had a cold snap. Just fired things up, made sure the cooling water was flowing and headed out...busting ice for a mile or two until we hit the drop off. From that point on it was ice fishing from a boat.

As for yanking it out in cold weather...also no problem. The motor will drain and there will be no freeze damage. When you want to use it, dunk the boat in the water, trim the motor down, let it sit a couple minutes, & fire the motor up.
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Old 10-29-2002, 02:27 PM
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Default Outboard in water when below freezing?

I'm going to try to fish a few more weeks up here in Boston and the air temps are getting into the low 30's. The boats in a slip so what you all are saying is that it is recommended that I leave the outboards in the down position instead of tilted out of the water. Is there going to be a corrosion problem over the next couple weeks that the lower units are in the water? Thanks for the advice, I was wondering about how to handle this situation.

JayB

2002 Bluewater 2550 w/ T200 HPDI's
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Old 10-29-2002, 02:42 PM
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Default Outboard in water when below freezing?

Remember, corrosion is a chemical reaction and as such is governed by that principle you learned in high school, the rate of a chemical reaction doubles for every 10 degrees Centigrade increase in temp. So when it's cold, not much happening! Also, most algae and other microbes including marine flora and fauna will grow very little (if at all) at near freezing temps.

In short, I'd be a lot more concerned about freezing water busting something mechanical than I would about corrosion and algae.

Hal
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Old 10-29-2002, 03:46 PM
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Default Outboard in water when below freezing?

Seems to be overwhelming response that ok to leave motor in water as long as motor if fully trimmed down. I guess logic is that all water in motor will flow down to and below the lake level. In this region, lake temperature seldom goes below freezing, even if air temp well below freezing. In addition, I would only leave it in the water for only a few days at a time.
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Old 10-29-2002, 06:03 PM
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Default Outboard in water when below freezing?

Remember, water freezes from the top,down! It is possible to lower your motor in water that may freeze,and the water in the exhust housing will also freeze. BUT, it will not bust(expand) because the water on the outside is also freezing. Now the water may eventually freeze all the way also till you have a complete "frozen" exhust housing but that is extreme and you should remove your boat unless you plan on having it lock'd into position 'till the spring with three or four feet of ice and people ice-skating around it till then. Like mention'd above, the ice dam built inside (assuming it's not too thick) will melt if the motor is started for a moment but monitor the tell-tale and engine temp. The ice build-up will also plugg the water-tube, too!! But again, exhust temps will melt that also in short order! For those too paranoid to leave it down, AT LEAST, bump the motor over and ensure the water pump is not capturing water. But be carefull of water in the prop area! Pour a little enviromental anti=freeze in there!!
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Old 10-30-2002, 07:57 PM
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Default Outboard in water when below freezing?

Fontana is a beautiful lake. I hear the winter fishing is good, but tva drops the bottom out of it in the winter. I live about a hour away, but don't get over there that often. Enjoy Fontana!!

Take care,

BC

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