Damage done?
Moderators: Redneck_Randy, badmoonrising, lakerunner
Damage done?
A buddy of mine pulled his pontoon out of the water and hit the master switch to kill the motor. About 2 minutes later he realized motor was still running. Master switch kills everything else but motor. I was at least 100 deg out that day, but the motor was simply idling. Motor is an outboard Yamaha. Damage done?
'Miss Kelley'
2015 Berkshire 253 RFX Super Sport
Yamaha F200 LB
14.5" X 15P SS Reliance
2015 Ram 1500 Eco Diesel
2015 Berkshire 253 RFX Super Sport
Yamaha F200 LB
14.5" X 15P SS Reliance
2015 Ram 1500 Eco Diesel
Re: Damage done?
My best guess is if it was only 2 minutes at idle no damage was done. Water pump would probably be the first thing to go and since it started wet I wouldn't worry about it if it has good water pressure now. When I did that my 2 cycle Johnson was noisy enough I knew what I had done the minute the motor was out of the water...I pulled up out of the way and redfacedly shut it off...No harm done.
[color=#FF0000]SOLD[/color]1975 24 ft Kayot, 1980 70hp Johnson formerly "Joy Toy", now named "Waterlogged" Sold
'03 F250 Powerstroke
2 60's 17ft Richline canoes Sold one
A place for everything...Everything out of place!
'03 F250 Powerstroke
2 60's 17ft Richline canoes Sold one
A place for everything...Everything out of place!
Re: Damage done?
WOW!
And +1 on the impeller, I would replace it.
And +1 on the impeller, I would replace it.
Last edited by Tlowry on Mon Aug 17, 2015 11:49 am, edited 1 time in total.
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- moregooder
- Posts: 153
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Re: Damage done?
Water pump would be highly suspect. even with starting out wet the impeller is still only mad of rubber
Re: Damage done?
Check to see if the alternator still works. Running without a load is not a good thing.
2006 Suntracker Party Barge 21
Mercury 90 4 stroke
Mercury 90 4 stroke
Re: Damage done?
Maybe a silly question, but if there were some kind of damage, wouldn't an alarm have sounded before hand?
Roland & Jo
2010 Bennington 20 Sfi
Yamaha 75 4 Stroke
Shreveport, Louisiana
2010 Bennington 20 Sfi
Yamaha 75 4 Stroke
Shreveport, Louisiana
- rancherlee
- Posts: 580
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- Location: Eveleth MN
Re: Damage done?
Probably not until major damage had happened already, temperature sensor usually need liquid passing by them to be accurate on liquid cooled engines. It takes along time for heat to transfer through the block or head to get where the sensor is with no coolant flow. Also most outboards don't have a Water pressure sensor either which in this case would have been nice as it would have tripped an alarm as soon as the pressure hit zero. In his case 2 minutes probably only will cost him a 50$ water pump impeller. I've messed around with some junk cars and got over 45 minutes of idle time out of an engine without coolant in it!ROLAND wrote:Maybe a silly question, but if there were some kind of damage, wouldn't an alarm have sounded before hand?
1988' Kennedy 20' "Haley's Comet"
Rebuilt 2016 with 25" single strake outer tubes and a 25x23" straked U-tube
2003 Suzuki DF140 - Yamaha 9.9HT kicker - 39.1@6300rpm
Rebuilt 2016 with 25" single strake outer tubes and a 25x23" straked U-tube
2003 Suzuki DF140 - Yamaha 9.9HT kicker - 39.1@6300rpm
Re: Damage done?
Huh???babock wrote:Check to see if the alternator still works. Running without a load is not a good thing.
2014 Sun Tracker Fishin Barge 22 DLX w/ 2014 Merc 90 FS
1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
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1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
[url=https://soundcloud.com/tom-lowry-1][u]Couple Tunes[/u][/url]
[url=https://www.flickr.com/photos/14121089@N06/][u]Some Pictures[/u][/url]
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Re: Damage done?
Which part didn't you understand?Tlowry wrote:Huh???babock wrote:Check to see if the alternator still works. Running without a load is not a good thing.
2006 Suntracker Party Barge 21
Mercury 90 4 stroke
Mercury 90 4 stroke
Re: Damage done?
Well, let's keep this short and talk in layman terms please. Could you explain how running an outboard in the water vs out of the water affects the load on the alternator?babock wrote:Which part didn't you understand?Tlowry wrote:Huh???babock wrote:Check to see if the alternator still works. Running without a load is not a good thing.
2014 Sun Tracker Fishin Barge 22 DLX w/ 2014 Merc 90 FS
1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
[url=https://soundcloud.com/tom-lowry-1][u]Couple Tunes[/u][/url]
[url=https://www.flickr.com/photos/14121089@N06/][u]Some Pictures[/u][/url]
[img]http://img.photobucket.com/albums/v249/DesertSkies/toonahfish_zpsb114cedf.jpg[/img]
1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
[url=https://soundcloud.com/tom-lowry-1][u]Couple Tunes[/u][/url]
[url=https://www.flickr.com/photos/14121089@N06/][u]Some Pictures[/u][/url]
[img]http://img.photobucket.com/albums/v249/DesertSkies/toonahfish_zpsb114cedf.jpg[/img]
Re: Damage done?
We are talking different types of loads. Nothing to do with being in the water obviously. By turning off the battery, you have removed the battery load from the alternator. This can cause huge voltage spikes that can damage it.
Never ever ever turn a battery switch to off while engine is running.
Never ever ever turn a battery switch to off while engine is running.
2006 Suntracker Party Barge 21
Mercury 90 4 stroke
Mercury 90 4 stroke
Re: Damage done?
I see your point but wouldn't this only be true if the master switch was a Pergo style switch that disconnects the batteries from the motor and the boat?
My older boats master switch disconnects just the boats fuse panel from the battery but leaves the battery connected to the motor and its charging system. This is important if you want to tilt the motor with the master switch off.
My older boats master switch disconnects just the boats fuse panel from the battery but leaves the battery connected to the motor and its charging system. This is important if you want to tilt the motor with the master switch off.
2014 Sun Tracker Fishin Barge 22 DLX w/ 2014 Merc 90 FS
1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
[url=https://soundcloud.com/tom-lowry-1][u]Couple Tunes[/u][/url]
[url=https://www.flickr.com/photos/14121089@N06/][u]Some Pictures[/u][/url]
[img]http://img.photobucket.com/albums/v249/DesertSkies/toonahfish_zpsb114cedf.jpg[/img]
1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
[url=https://soundcloud.com/tom-lowry-1][u]Couple Tunes[/u][/url]
[url=https://www.flickr.com/photos/14121089@N06/][u]Some Pictures[/u][/url]
[img]http://img.photobucket.com/albums/v249/DesertSkies/toonahfish_zpsb114cedf.jpg[/img]
Re: Damage done?
On my boat, the master switch is a Perko type switch and it came that way. I know its a hassle but I prefer being able to disconnect all power from the motor. To me. its a safety issue in case something goes majorly wrong. Example...starter solenoid sticking.Tlowry wrote:I see your point but wouldn't this only be true if the master switch was a Pergo style switch that disconnects the batteries from the motor and the boat?
My older boats master switch disconnects just the boats fuse panel from the battery but leaves the battery connected to the motor and its charging system. This is important if you want to tilt the motor with the master switch off.
Last edited by babock on Wed Aug 19, 2015 10:20 am, edited 1 time in total.
2006 Suntracker Party Barge 21
Mercury 90 4 stroke
Mercury 90 4 stroke
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Re: Damage done?
I saw this happen not that long ago at our boat ramp. Guy drove off with his stern drive running! He was hammered though! I agree, impeller and if parts are missing, back flush the passages. The parts can get caught in the piss tube and t-stats.
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Re: Damage done?
Had this happen on a 115 once. Piece of the impeller came off and went into the feed tube to the power head. It restricted the flow to where it would overheat if run on plane for around a mile. Took a while to figure it out cause at slower speeds, I got no alarm.
2014 Sun Tracker Fishin Barge 22 DLX w/ 2014 Merc 90 FS
1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
[url=https://soundcloud.com/tom-lowry-1][u]Couple Tunes[/u][/url]
[url=https://www.flickr.com/photos/14121089@N06/][u]Some Pictures[/u][/url]
[img]http://img.photobucket.com/albums/v249/DesertSkies/toonahfish_zpsb114cedf.jpg[/img]
1984 Mon Ark 20 w/ 2000 Merc 50 FS Bigfoot (now belongs to nephew)
[url=https://soundcloud.com/tom-lowry-1][u]Couple Tunes[/u][/url]
[url=https://www.flickr.com/photos/14121089@N06/][u]Some Pictures[/u][/url]
[img]http://img.photobucket.com/albums/v249/DesertSkies/toonahfish_zpsb114cedf.jpg[/img]